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WO2014097458A1 - Système d'identification de dispositif électrique, générateur de signal d'identification de dispositif électrique et dispositif d'identification de dispositif électrique - Google Patents

Système d'identification de dispositif électrique, générateur de signal d'identification de dispositif électrique et dispositif d'identification de dispositif électrique Download PDF

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Publication number
WO2014097458A1
WO2014097458A1 PCT/JP2012/083133 JP2012083133W WO2014097458A1 WO 2014097458 A1 WO2014097458 A1 WO 2014097458A1 JP 2012083133 W JP2012083133 W JP 2012083133W WO 2014097458 A1 WO2014097458 A1 WO 2014097458A1
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WIPO (PCT)
Prior art keywords
identification
identification signal
current waveform
electrical
feature vector
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Ceased
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PCT/JP2012/083133
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English (en)
Japanese (ja)
Inventor
尚和 内田
鴨川　浩二
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Hitachi Consumer Electronics Co Ltd
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Hitachi Consumer Electronics Co Ltd
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Priority to PCT/JP2012/083133 priority Critical patent/WO2014097458A1/fr
Publication of WO2014097458A1 publication Critical patent/WO2014097458A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/2513—Arrangements for monitoring electric power systems, e.g. power lines or loads; Logging

Definitions

  • the present invention relates to an electric equipment identification system, an electric equipment identification signal generator, and an electric equipment identification device.
  • Patent Document 1 discloses a plurality of power devices to which power is supplied through a power receiving unit for the purpose of accurately determining the operation status of individual power devices without measuring each time at the operation site of the power device.
  • a power monitoring system that monitors the operating status of the power supply unit, a current measuring unit that measures the total current of the power receiving unit and the load current of each power device, and a load that is measured through the current measuring unit for each power device.
  • a plurality of harmonic generation means for generating harmonics at a level proportional to the current, and a total current measured through the current measurement means is Fourier-transformed into a time series of effective current values at each frequency, and the harmonic generation means
  • An electric power monitoring system is disclosed that includes analysis means for analyzing the operating status of each electric power device based on the generated harmonics.
  • Patent Document 2 is a technique for individually measuring the operating state of an electric device used in a general home or the like, and even if the electric device does not generate a harmonic component during operation, the operating state can be accurately detected.
  • a device operation detection system or the like for example, it is installed between a power supply line and an electric device, and it is determined whether or not the electric device is in operation.
  • a frequency component different from the harmonic component of the commercial power supply frequency is generated on the power supply line by cutting off the current from the power supply line to the electrical device at a frequency different from the fundamental frequency of the power supply frequency and its multiplication.
  • a signal generator configured as described above is disclosed.
  • Patent Document 1 the operating status of the power equipment is monitored using harmonics at a level proportional to the load current of the power equipment. For example, when harmonics are superimposed near the peak of the load current. There is a problem that the harmonic component may not be properly detected. There is also a problem that it is necessary to continuously analyze the total current measured by the current measuring means during the period of monitoring the operating status of the power equipment.
  • Patent Document 2 a specific frequency component is generated on a feeder line by interrupting a current to the electrical device at a frequency different from the basic frequency of the commercial power supply frequency and its multiplication for the electrical device in operation.
  • the frequency component may not be properly detected, and the current to the electric device is continuously applied during the monitoring period of the electric machine. There is a problem that it is necessary to keep monitoring.
  • an object of the present invention is to identify an electric device that allows a user to easily and accurately monitor the operation status of the electric device without requiring a complicated setting / registration operation for the measurement target device.
  • a system, an electric equipment identification signal generator, and an electric equipment identification device are provided.
  • one aspect of the present invention is an electrical system for identifying the electrical devices from each other and monitoring the operation status of the electrical devices for a plurality of electrical devices connected to an AC power source.
  • An electrical equipment identification signal generator that is electrically connected between the electrical equipment and the AC power source and generates an identification signal for identifying the electrical equipment from the other electrical equipment.
  • An electrical device identification device that measures a current waveform of a current flowing from the AC power source and determines whether the identification signal corresponding to any of the electrical devices is included in the current waveform, the electrical device identification signal The generator generates a plurality of identification signals for identifying the electrical devices from the current waveform of the AC power supply in a magnitude proportional to the current consumption of each connected electrical device.
  • An identification signal generator that assigns each identification signal to a plurality of identification signal setting sections discretely set at a constant time interval from a zero-cross point of the current waveform of the AC power supply, and the identification signal generator generates An identification signal superimposing unit that superimposes the identification signal on a current from the AC power source, and the electric device identification device stores identification signal data that is data of a feature vector included in the identification signal A data storage unit, acquiring the current waveform of the AC power supply, extracting a feature vector of a period corresponding to the identification signal setting section from the current waveform, and identifying the feature vector and the identification signal in the identification signal setting section An identification signal analysis unit that identifies the electrical devices connected to the electrical device identification signal generator by comparing the signal data with each other. And which is an electric device identification system.
  • the other aspect of this invention includes the electric equipment identification signal generator and electric equipment identification device which are used in said electric equipment identification system.
  • an identification signal generator and an electrical equipment identification device can be provided.
  • 10 is a flowchart illustrating an example of a setting flow of the installation of the identification adapter 300 and the device identification apparatus 200. It is a flowchart which shows an example of the check processing flow of the identification wave which can be used.
  • 5 is a flowchart showing an example of an installation guidance process flow for an identification adapter 300. It is a flowchart which shows an example of an operation equipment identification result display processing flow. It is a flowchart which shows an example of an operation equipment identification result display processing flow. It is a flowchart which shows an example of the electric current waveform registration process flow of an electric equipment.
  • FIG. 6 is a diagram illustrating a configuration example of an initial setting screen displayed on the device identification apparatus 200.
  • FIG. 6 is a diagram illustrating a configuration example of an initial setting screen displayed on the device identification apparatus 200.
  • FIG. 6 is a diagram illustrating a configuration example of an initial setting screen displayed on the device identification apparatus 200.
  • FIG. 6 is a diagram illustrating a configuration example of an initial setting screen displayed on the device identification apparatus 200.
  • FIG. 6 is a diagram illustrating a configuration example of an initial setting screen displayed on the device identification apparatus 200.
  • FIG. 6 is a diagram illustrating a configuration example of an initial setting screen displayed on the device identification apparatus 200.
  • FIG. 6 is a diagram illustrating a configuration example of an initial setting screen displayed on the device identification apparatus 200.
  • FIG. It is a figure which shows the structural example of the apparatus operating condition display screen displayed on the apparatus identification device.
  • the figure which shows the structural example of the apparatus operating condition display screen displayed on the apparatus identification device 200 The figure which shows the structural example of the apparatus operating condition display screen displayed on the apparatus identification device 200
  • It is a figure which shows the structural example of the current waveform learning screen displayed on the apparatus identification device.
  • the electric device identification system 1 illustrated in FIG. 1 includes an electric device identification device 200 and electric device identification adapters 300A and 300B (electric device identification signal generators).
  • the electric device identification system 1 is abbreviated as the identification system 1
  • the electric device identification device 200 is abbreviated as the device identification device 200
  • the electric device identification adapters 300A and 300B electric device identification signal generators
  • the identification adapter 300A, 300B when describing the identification adapter 300A, 300B alone, it will be referred to as the identification adapter 300.
  • the identification system 1 of this embodiment is installed to monitor the operating status of the electric devices 400A to 400N that receive power supply from the AC power supply 110 via the power supply line 120.
  • the electric devices 400A to 400N are also referred to as the electric device 400 when specifying a single electric device.
  • FIG. 1 shows a configuration in which at least four electrical devices 400 are installed, the identification system 1 can be applied to two or more electrical devices 400.
  • the electric devices 400A to 400N are respectively connected to a wiring 120A branched from a power supply line 120 drawn into the distribution board 100 via a security device (not shown).
  • the distribution board 100 is provided with a voltage / current measurement unit 101, and a device identification device 200 is connected to the voltage / current measurement unit 101.
  • the voltage / current measuring unit 101 may be installed at a place other than the inside of the distribution board 100.
  • the voltage / current measurement unit 101 includes voltage / current detection means such as PT (Potential Transformer) and CT (Current Transformer) (not shown).
  • the device identification apparatus 200 analyzes the characteristics of the current waveform measured by the voltage / current measuring unit 101, thereby allowing the electric devices 400A to 400A to which power is supplied from the distribution board 100 on which the voltage / current measuring unit 101 is installed. The operation state of 400N is estimated. Since the current waveform of the load current of each electric device 400 shows a different shape for each device, it is possible to estimate which electric device 400 is operating by analyzing this.
  • the device identification device 200 When causing the device identification device 200 to identify the electric device 400, the device identification device 200 performs current waveform measurement and feature extraction in advance, and registers the feature in the device identification device 200.
  • the identification adapter 300 is a device that generates a predetermined current waveform previously registered in the device identification device 200 in accordance with the state of the electric device 400 connected to the power line 120 and the wiring 120A and superimposes it on the power line 120.
  • the electric device 400A to which the identification adapter 300A is connected allows the device identification device 200 to identify the current waveform that the identification adapter 300A superimposes on the power line 120 without registering the characteristics of the current waveform. Is possible.
  • the current waveform as the identification signal generated by each identification adapter 300 is referred to as “identification wave”. Further, the identification wave is assumed to be synchronized with the cycle of the AC voltage / current of the AC power supply 110.
  • the identification adapter 300 is configured to be able to select and generate a plurality of types of identification waves according to settings. When a plurality of identification adapters 300 are used, interference between identification waves can be prevented by setting each identification adapter 300 to generate a different identification wave.
  • FIG. 5 shows an example of an identification wave generated by the identification adapter 300.
  • Reference numeral 510 represents an example of identification waves 511 to 516 generated by the identification adapter 300
  • reference numeral 520 represents an example of a current waveform of an alternating current obtained as a result of superimposing the identification wave 513 on the power line 120, for example.
  • the AC cycle 500 is determined by the power supply frequency of the AC power supply 110, and is 20 ms for a single-phase AC of 50 Hz.
  • the identification waves 511 to 516 are synchronized with the cycle of the AC power source 120 and are always superimposed at the same timing as the AC cycle. For example, in the example of FIG.
  • FIG. 5 A current waveform indicated by reference numeral 510 having the same number indicates that it is a pair of identification waves.
  • a plurality of identification waves 511 to 516 are illustrated by reference numeral 510, but as indicated by reference numeral 520, the identification adapter 300 that has completed the initial setting has any one of the identification waves 511 to 511. 516 is generated and superimposed on the power line 120.
  • the types of identification waves are not limited to this number.
  • the structure of the identification adapter 300 can be simplified correspondingly and can be realized at low cost.
  • the types of identification waves to be generated are increased, the number of identification adapters 300 that can be used simultaneously in the same system can be increased.
  • FIG. 5 indicates that there is no identification wave to be superimposed in the section between the identification waves 513 and 514. Since this section in the AC power supply cycle includes the peak point of the current waveform, even if the identification wave is superimposed, it is easily buried in the component of the current waveform. Therefore, in the identification adapter 300 of this embodiment, the identification waves 511 to 516 are superimposed on a section other than the section including the peak point.
  • the length of the section including the peak point where the identification wave is not superimposed can be defined as, for example, about 1/3 of the half cycle of the current waveform.
  • the electric device 400 is a variety of electric devices used for consumer and industrial purposes, and includes a wide variety of electric devices such as televisions, refrigerators, air conditioners, etc. in general homes, various machine tools installed in factories, etc. Included.
  • FIG. 2 shows a configuration example of the device identification apparatus 200 according to the first embodiment of the present invention.
  • 2 includes a power supply circuit 201, a display device 202, an instruction input unit 203, an I / O interface 204, a processor 205, a memory 206, a timer 207, an auxiliary storage interface 208, and a measurement input unit 219. And these components are communicatively coupled to each other via an internal bus.
  • the voltage / current measurement unit 101 provided outside the device identification device 200 is connected to the measurement input unit 219 of the device identification device 200.
  • the voltage / current measurement unit 101 and the measurement input unit 219 have a function of sampling the AC voltage / current on the power supply line 120 at a frequency of about 20000 times per second and digitizing the voltage / current waveform.
  • the device identification apparatus 200 measures instantaneous values of voltage and current at least at the time of the AC voltage cycle (20 ms in the case of single-phase AC 50 Hz) at the aforementioned time interval.
  • the display device 202 is a display unit for displaying various information related to the identification system 1 by a display device such as an LCD (Liquid Crystal Display) or an organic EL (Electroluminescence). Screens for displaying various types of information include a series of operation screens such as a data registration screen and an identification result screen.
  • a display device such as an LCD (Liquid Crystal Display) or an organic EL (Electroluminescence).
  • Screens for displaying various types of information include a series of operation screens such as a data registration screen and an identification result screen.
  • the instruction input unit 203 is a device that receives an operation instruction from a user, and includes a pointing device represented by a mouse, a touch panel integrated with the display device 202, and the like.
  • the typical instruction input unit 203 is realized by operating a button displayed on the screen of the display device 202 using a pointing device such as a mouse of the instruction input unit 203 or a touch panel.
  • the I / O interface 204 is an interface circuit for communicably connecting the display device 202 and the instruction input unit 203 to other parts such as a processor 205 described later.
  • the processor 205 includes arithmetic devices such as a CPU (Central Processing Unit) and an MPU (Microprocessing Unit), and controls each unit of the device identification apparatus 200 by executing a control program 210 loaded in a memory 206 described later.
  • arithmetic devices such as a CPU (Central Processing Unit) and an MPU (Microprocessing Unit)
  • the memory 206 includes a semiconductor storage device such as a ROM (Read Only Memory) or a DRAM (Dynamic Random Access Memory), and provides a storage area for temporarily storing programs, data, and the like.
  • a semiconductor storage device such as a ROM (Read Only Memory) or a DRAM (Dynamic Random Access Memory), and provides a storage area for temporarily storing programs, data, and the like.
  • the timer 207 includes an oscillation element such as a crystal oscillation mechanism, and is used to hold the current time and measure the timing at which the voltage / current measurement unit 101 performs measurement.
  • an oscillation element such as a crystal oscillation mechanism
  • the auxiliary storage interface 208 is an interface circuit that plays a role of connecting an auxiliary storage device 209, which will be described later, and the other part of the device identification device 200.
  • the auxiliary storage device 209 is a storage device such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive), and is used when the control program 210 executed by the device identification apparatus 200 and the control program 210 are executed. 220 and the like are stored.
  • HDD Hard Disk Drive
  • SSD Solid State Drive
  • the control program 210 includes a user interface control unit 211 (hereinafter referred to as “UI control unit 211”), a measurement control unit 212, a feature vector extraction unit 213, a feature vector comparison unit 214, a data access unit 215, and an identification wave selection unit 216.
  • UI control unit 211 user interface control unit
  • the measurement control unit 212, the feature vector extraction unit 213, the feature vector comparison unit 214, the data access unit 215, and the identification wave selection unit 216 constitute an “identification signal analysis unit”.
  • the control program 210 is divided into a plurality of functional blocks as described above. However, if the data processing function in this embodiment can be achieved, the control program 210 is organized in other forms. May be.
  • the stored data 220 includes identification adapter data 221 (identification signal data), electrical equipment data 222, and current sampling data 223. The contents of each data will be described later.
  • the UI control unit 211 is a program that controls display / switching of a screen displayed on the display device 202.
  • the measurement control unit 212 has a function of taking the AC voltage value / current value in the power supply line 120 acquired from the external voltage / current measurement unit 101 by the measurement input unit 219 into the control program as digital data.
  • the feature vector extraction unit 213 has a function of generating a feature vector by performing time-frequency analysis of an AC current waveform in the power supply line 120 measured by the voltage / current measurement unit 101.
  • “temporal frequency analysis” is a method of examining frequency information at a certain point of the analysis target signal.
  • time-frequency analysis for example, there is a short-time Fourier transform in which a Fourier transform is performed by multiplying an analysis target signal while shifting a window function.
  • the calculation is performed while continuously shifting the window function.
  • the window function is set at regular time intervals in order to reduce the amount of calculation required for the short-time Fourier transform processing. Calculations are performed with discrete shifts.
  • the identification adapter 300 which will be described later, overlaps the identification wave by dividing the window width into sections indicated by reference numerals 531 to 533 in FIG.
  • a short-time Fourier transform is performed at a position (time) where the image can be generated. By doing so, the presence or absence of each identification wave 511 to 516 can be confirmed with a minimum calculation.
  • one to several power spectra selected in descending order of power from the spectrogram obtained by short-time Fourier transform and the time information of each spectrum are used as feature vectors as feature vectors.
  • power refers to the sum of the power (magnitude) of all frequencies constituting the spectrum. The reason for selecting a spectrum with high power is that identification is easier as the power of the spectrum is larger.
  • time information is information indicating the number of the spectrum in the section as indicated by reference numerals 531 to 533 in FIG.
  • the feature vector comparison unit 214 has a function of determining whether the feature vector extracted by the feature vector extraction unit 213 matches the feature vector in the identification adapter data 221 and the electrical device data 222.
  • the feature vector match determination is, for example, a well-known method in which, after normalizing a feature vector and aligning the sizes, a square error of each numerical value constituting the feature vector is calculated, and the closest error is determined as a match. It can be implemented using a method.
  • the feature vector match determination method may be any method that can quantitatively calculate how close the feature vectors to be compared are, and a method other than the square error may be used.
  • the data access unit 215 has a function of referring to and writing data stored in the identification adapter data 221, the electric device data 222, and the current sampling data 223.
  • the stored data 220 includes identification adapter data 221, electrical device data 222, and current sampling data 223.
  • the identification adapter data 221 is data relating to the feature vector of the identification wave generated by the identification adapter 300, and is created in a table format.
  • FIG. 8 shows an example of the identification adapter data 221.
  • the identification adapter data 221 includes items of an identification wave ID 801, an identification wave feature vector 802, a reference wave feature vector 805, a registered device name 808, an availability flag 809, and a display availability flag 810.
  • the identification wave ID 801 is an ID uniquely given to the identification wave generated by the identification adapter 300.
  • the identification adapter 300 is provided with a switch for setting the identification wave ID, and any identification wave ID is selected for each identification adapter 300.
  • the registered device name 808 is the name of the electric device 400 connected to the identification adapter 300 and is input by the user by a method described later.
  • the example of the first row in the table of FIG. 8 indicates that “TV” is connected to the identification adapter 300 whose identification wave ID is set to “1”.
  • the identification wave feature vector 802 and the reference wave feature vector 805 are feature vectors acquired for the identification wave to which the corresponding identification wave ID 801 is attached.
  • the identification adapter 300 also generates a signal referred to as a reference wave, which will be described later, and uses these two signals to identify the electric device 400. Therefore, two feature vectors exist for one identification wave ID 801. It is registered.
  • the identification adapter data 222 has one spectrum for each feature vector. This is because, as shown in FIG. 5, the identification wave and the reference wave of the identification adapter 300 are characterized only in a predetermined section of the alternating current waveform, and can be identified by analyzing only that section. It is.
  • the availability flag 809 is a flag indicating whether or not the identification wave specified by the corresponding identification wave ID 801 is usable.
  • “in use” is recorded in the availability flag 809.
  • “usable” is recorded in the availability flag 809 as illustrated in FIG.
  • it is checked whether or not such identification wave interference occurs by a method described later. If it is determined that interference occurs, “unusable” is set.
  • the electrical device data 222 is data in which feature vectors of the current waveform of the electrical device 400 are recorded in a table format.
  • the electric appliance 400 is identified by the appliance identification device 200 without using the identification adapter 300, it is necessary for the user to measure and register the current waveform of the electric appliance 400.
  • the feature vector extracted from the alternating current waveform measured for each electrical device 400 is stored as electrical device data 222.
  • FIG. 9 shows an example of the electrical equipment data 222.
  • the electrical device data 222 includes a device ID 901, a feature vector 902, a registered device name 910, and a display enable / disable flag 911.
  • the device ID 901 is uniquely assigned to each feature vector, and is used when referring to each feature vector.
  • the feature vector 902 further includes items of feature 1 (903, 904), feature 2 (905, 906), feature 3 (907, 908), and power 909. As features 1 to 3, the top three spectra having the highest power are selected from the spectrogram.
  • Reference numerals 904, 906, and 908 indicate spectra acquired for each feature vector
  • reference numerals 903, 905, and 907 indicate time information corresponding to each spectrum (which time point in the spectrogram the spectrum is at).
  • the power 909 is the power when the spectrum appears, and is calculated from the current sampling data 223 when the feature vector 902 is registered.
  • feature 1 of feature vector 902 identified by device ID 901 of 1 in FIG. 9 is expressed as a spectrum indicated by “a1, a2,..., An” in “section 1”.
  • the registered device name 910 is the name of the device indicated by the feature vector 902 such as “TV” and “air conditioner”, for example.
  • the registered device name 910 is input by the user by a method described later.
  • the display enable / disable flag 911 indicates whether or not to display a corresponding feature vector 902 on the device operation status display screen (FIG. 19) described later when the device identification device 200 identifies the registered feature name. It is input by the user as in 910.
  • the current sampling data 223 is data recorded by the data access unit 215 as the measurement value based on the sampling result of the current waveform that is always performed at regular intervals by the measurement control unit 212 of the device identification apparatus 200. It is. In other words, the current sampling data 223 is data obtained by measuring the alternating current waveform on the power supply line 120 by the measurement control unit 212 and digitizing it by a known method.
  • FIG. 3 shows a configuration example of the identification adapter 300 according to the first embodiment of the present invention.
  • the identification adapter 300 includes a power supply circuit 301, a rectangular wave shaping unit 302, a delay amount changeover switch 303, a reference wave generation unit 304, an identification wave generation unit 305, a gain adjustment unit 306, a current measurement unit 307, a current waveform superposition unit 308, and an outlet.
  • a plug 309 and an outlet 310 are provided.
  • the rectangular wave shaping unit 302, the delay amount changeover switch 303, the reference wave generation unit 304, the identification wave generation unit 305, and the gain adjustment unit 306 constitute an “identification signal generation unit”.
  • the identification adapter 300 is connected to the AC power supply 110 by inserting the outlet plug 309 into the outlet 130 provided in the customer facility. Further, by connecting the outlet plug 311 of the electric device 400 to the outlet 310 of the identification adapter 300, the electric device 400 is connected to the AC power supply 110 via the power line 120 of the identification adapter 300.
  • the power circuit 301, the current sensor 306, and the current waveform superimposing unit 308 are connected to the power line 120 connected to the AC power source 110 connected by the outlet plug 309.
  • the power supply circuit 301 is a circuit for supplying DC power as a circuit power supply in the identification adapter 300.
  • the rectangular wave shaping unit 302, the delay amount changeover switch 303, the reference wave generation unit 304, the identification wave generation unit 305, and the gain adjustment unit 306 are circuits for generating the identification wave illustrated in FIG.
  • the current waveform superimposing unit 308 is a transformer for superimposing the generated identification wave on the power supply line 120 with a predetermined accuracy, and uses a transformer capable of transmitting harmonics up to about 10 kHz.
  • the current measuring unit 307 is a transformer for measuring the current flowing through the power supply line 120. Since the current measurement unit 307 has a purpose of current measurement, the transformer does not require as high frequency characteristics as the current waveform superimposing unit 308. In the current measuring unit 307, a shunt resistor may be used instead of the transformer.
  • the rectangular wave shaping unit 302 receives the AC voltage waveform from the power supply line 120 as input, and generates a rectangular wave with the same period. Further, a plurality of rectangular waves having different phases are generated based on the rectangular waves and input to the delay amount changeover switch 303.
  • the delay amount changeover switch 303 selects one of the plurality of rectangular waves input from the rectangular wave shaping unit 302 and inputs the selected one to the reference wave generation unit 304 and the identification wave generation unit 305.
  • the reference wave generation unit 304 and the identification wave generation unit 305 are circuits that convert the rectangular wave input from the delay amount changeover switch 303 into a spiked waveform.
  • the reference wave generation unit 304 outputs a waveform having a constant magnitude
  • the identification wave generation unit 305 outputs a waveform having a magnitude proportional to the power consumption of the electric device 400 connected to the identification adapter 300.
  • the device identification device 200 can estimate the power consumption together with the operating state of the electrical device 400 by changing the magnitude of the identification wave according to the power consumption of the connected electrical device 400. I am doing so. Further, when the device identification device 200 observes the identification wave, the identification wave attenuates due to the influence of the impedance of the power supply line 120 from the distribution board 100 to which the device identification device 200 is attached to the outlet 130 to which the identification adapter 300 is attached. Since there is a possibility, the reference wave generation unit 304 outputs an identification wave serving as a reference for the amplitude. This identification wave is called a reference wave (reference signal).
  • the adjustment of the identification wave size is realized by the gain adjustment unit 306 controlling the gain of the identification wave generation unit 305 so as to be proportional to the current input from the current measurement unit 307.
  • the device identification device 200 adjusts the power consumption value of the electric device 400 estimated from the identification wave according to the magnitude of the reference wave. For example, assume that the magnitude of the reference wave is 1. At this time, it is assumed that the magnitude of the reference wave of an identification adapter 300 observed by the device identification apparatus 200 is 0.8. This indicates that the reference wave generated by the identification adapter 300 is reduced by 20% due to the influence of the power distribution path, and accordingly, the power consumption value estimated from the identification wave is adjusted to increase by 25%.
  • FIG. 4 shows a more detailed configuration example of the identification adapter 300 having the configuration illustrated in FIG.
  • the operation of the identification adapter 300 will be described using the detailed configuration example of FIG. 4 and FIG. 6 schematically showing the process of generating the identification wave.
  • the rectangular wave shaping unit 302 in the preceding stage of the delay amount changeover switch 303 is a circuit that generates a rectangular wave from a sine wave of an AC voltage waveform. As shown by reference numeral 601 in FIG. This is achieved by cutting out the signal.
  • the AC voltage waveform indicated by reference numeral 601 becomes a rectangular wave indicated by reference numeral 602 by applying a DC bias through a limiter circuit adjusted to cut out a signal in the range between the voltages V1 and -V1.
  • the rectangular wave shaping unit 302 is not limited to a limiter circuit as long as it can generate a rectangular wave having the same period as that of the input sine wave.
  • the delay unit 3031 is connected next to the rectangular wave shaping unit 302.
  • the delay device 3031 is a circuit that outputs a rectangular wave whose phase is delayed by a predetermined time when the rectangular wave is input from the rectangular wave shaping unit 302, and is realized by a low-pass filter and a comparator.
  • the rectangular wave input to the delay device 3031 is first converted into a waveform with a rounded corner as indicated by reference numeral 603 in FIG.
  • the waveform that has passed through the low-pass filter is then compared with a predetermined voltage by the comparator, binarized with the threshold voltage as a boundary, and output.
  • a waveform obtained by binarizing the waveform indicated by reference numeral 603 using the voltage V2 as a threshold is indicated by reference numeral 604.
  • the delay time can be arbitrarily set at the time of design by changing the circuit constant of the low-pass filter or the threshold voltage of the comparator.
  • the waveform output from the delay device 3031 is input to the next delay device 3031 and the switch 3032.
  • a rectangular wave whose phase is gradually shifted is input to the switch 3032.
  • the switch 3032 selects an arbitrary rectangular wave from the plurality of rectangular waves and inputs the selected rectangular wave to the reference wave generation unit 304 and the identification wave generation unit 305 in the next stage.
  • the reference wave generation unit 304 and the identification wave generation unit 305 are configured by a high-pass filter and an amplifier.
  • the rectangular wave from the switch 3032 passes through the high-pass filter, so that the low-frequency component including the DC component is cut and converted to an AC waveform on the spike as indicated by reference numeral 605 in FIG.
  • the AC waveform is amplified to a predetermined magnitude by the amplifier 3043.
  • the amplified waveform is superimposed on the power supply line 120 by the current waveform superimposing unit 309, and a current waveform including an identification wave as indicated by reference numeral 607 is generated.
  • the reference wave generation unit 304 gives a phase difference by the delay unit 3041 to the rectangular wave input from the delay amount changeover switch 303 as compared with the identification wave generation unit 305.
  • FIG. 7 shows the relationship between the delay devices 3031 and 3041 and the generated identification wave.
  • Reference numeral 701 indicates a rectangular wave that is the basis of an identification wave having a certain identification wave ID 801.
  • the rectangular wave 701 whose phase is delayed by the delay device 3031 is a rectangular wave 702, which becomes a rectangular wave that is the basis of the identification wave of the next identification wave ID 801.
  • the rectangular wave 701 is finally shaped into an identification wave 705.
  • the delay wave 3041 is shaped into a rectangular wave 703 that is the basis of the reference wave, and the rectangular wave 703 finally becomes the reference wave 706.
  • the rectangular wave 702 becomes an identification wave 707 and a reference wave 708.
  • the delay amounts of the delay device 3031 and the delay device 3041 are set so that the identification wave specified by each identification wave ID 801 and the reference wave do not overlap in this way.
  • the identification wave of each identification wave ID 801 and the reference wave are illustrated as being generated adjacent to each other. However, it is sufficient that the identification wave 707 and the reference wave 708 that make a pair do not overlap with each other. , Not necessarily adjacent.
  • Device Identification System 1 Data processing executed by the identification system 1 including the device identification device 200 and the identification adapter 300 having the above-described configuration will be described below with reference to the flowcharts of FIGS.
  • the sampling of the current waveform is always performed at regular intervals by the measurement control unit 212 of the device identification device 200, and the data access unit 215 records the measured value as the current sampling data 223.
  • the data access unit 215 deletes the old data and records new data.
  • FIG. 10 is an example of a flowchart for explaining processing until the identification adapter 300 is connected to an arbitrary electric device 400 and the device identification device 200 identifies the identification adapter 300.
  • the device identification device 200 is already installed and the voltage / current measurement unit 101 is connected to the distribution board 100.
  • the symbol S represents “step”.
  • the control program 210 of the device identification apparatus 200 starts the process (S1000), and first, the identification wave selection unit 216 checks the usable identification wave ID 801 (S1001). In this step, the identification wave selection unit 216 searches for the identification wave ID 801 whose availability flag is “usable” from the identification adapter data 221 (800) of the stored data 220. Furthermore, the identification wave selection unit 216 checks whether the current waveform of the entire system on the power supply line 120 has the same characteristics as the identification wave identified by the identification wave ID 801 that is “usable”.
  • the process in S1001 is a process for checking whether an erroneous determination of the identification wave is caused by the current waveform of the system, and details thereof will be described with reference to the flowchart shown in FIG.
  • the UI control unit 211 displays the check result on the display device 202 (S1002). Note that not all electric devices 400 in the system are operating at the time of checking, and it is usually difficult to confirm whether all the electric devices 400 have interference with identification waves. Therefore, the identification wave selection unit 216 is configured to periodically execute the processing of S1001 other than the processing execution of this flowchart and update the availability flag of the identification adapter data 221 as needed.
  • UI control The unit 211 displays a screen for reviewing the installed device on the display device 202 (S1004).
  • FIG. 23 shows an example of the installed device review screen 1830.
  • the installed device review screen 1830 is provided with a list 1831 of electric devices registered in the identification system 1 and a selection column 1832 for selecting an electric device whose registration is to be deleted.
  • the data access unit 215 stores the information on the electrical device recorded in the identification adapter data 221.
  • the device information is deleted (S1005).
  • the registration cancel button 1834 is pressed (S1004: Cancel)
  • the data access unit 215 cancels the setting of the identification adapter 300 and ends the process (S1008).
  • FIG. 18 shows a screen example of the device name input screen 1810 displayed on the display device 202. The user can perform registration by inputting a device name connected to the input field 1812 on the device name input screen 1810 and pressing a registration button 1813.
  • S1007 When the input of the name of the electric device 400 is completed, setting guidance on the identification adapter 300 side is performed (S1007).
  • S1003 a method for setting the identification wave ID 801 selected by the device identification apparatus 200 to the identification adapter 300 is guided, and the user sets the identification adapter 300 according to the guidance.
  • An example of the identification adapter installation / setting guide screen 1820 is shown in FIG.
  • the illustrated identification adapter installation / setting guide screen 1820 is provided with an icon 1821 illustrating switch settings, and the user presses an OK button 1823 after completion. Details of the identification adapter installation / setting guidance process in S1007 will be described later with reference to FIG.
  • FIG. 11 is an example of a flowchart for explaining the usable ID check process (S1001) in the flowchart of FIG. The process will be described together with the example of the identification adapter data 221 in FIG.
  • the data access unit 215 refers to the current sampling data 223, and the feature vector extraction unit 214 performs spectrum extraction by short-time Fourier transform (S1101).
  • the data access unit 215 refers to the identification adapter data 221 (S1102), and determines whether there is an identification wave ID 801 in which the availability flag 809 is “usable” (S1103).
  • the data access unit 215 ends the process (S1108).
  • the data access unit 215 selects one identification wave ID 801 (S1104).
  • the identification waves ID2 and 3 correspond to this.
  • the feature vector comparison unit 214 compares the spectrum extracted from the current waveform with the spectrum of the identification wave (S1105). The comparison is performed by normalizing the size of the spectrum of the identification adapter data 221 to the same size as the spectrum calculated from the current sampling data 223.
  • the feature vector comparison unit 214 checks whether or not the current waveform of the entire system has the same feature as the identification wave specified by the selected identification wave ID 801, and whether or not an erroneous determination of the identification wave occurs due to the current waveform of the system. Is confirmed (S1106).
  • the feature vector comparison unit 214 determines that there is an identification wave with the ID (S1106: YES)
  • the identification wave selected in S1104 interferes with the current waveform of any of the electrical devices 400 operating in the system, causing an error.
  • the data access unit 215 sets the availability flag 809 corresponding to the identification wave ID 801 of the identification wave to “unusable” (S1107), and the presence / absence determination of the available identification wave in S1103. Return to processing.
  • the availability flag 809 of the identification wave ID 801 is not changed and remains “usable”.
  • the data access unit 215 ends the process (S1108).
  • the device identification apparatus 200 does not interfere with the current waveform of the existing electric device 400 from the identification wave ID 801 recorded as “usable identification wave” in the identification adapter data 221, and actually Usable identification wave IDs 801 can be selected.
  • FIG. 12 shows an example of a flowchart for explaining the installation guidance processing of the identification adapter 300.
  • a guidance screen is displayed on the display device 202.
  • the guidance is given to the device identification device 200. It is also possible to add a known configuration for outputting the contents of the screen by voice so as to perform guidance by voice.
  • the UI control unit 211 connects the identification adapter 300 to an arbitrary outlet 130 to the display device 202, and connects the electrical device 400 to be identified to the identification adapter 300.
  • a guidance screen is displayed (S1201). Further, the UI control unit 211 instructs the identification adapter 300 to set the identification wave ID 801 (S1202).
  • the identification wave ID 801 specified here is the identification wave ID 801 selected by the device identification apparatus 200 in S1003 of FIG.
  • the user sets the identification wave ID 801 with the delay amount changeover switch 303 of the identification adapter 300 according to the instruction.
  • An example of the identification wave ID setting instruction screen 1820 is shown in FIG. On the identification wave ID setting instruction screen 1820, the device name 1821 input by the user on the screen 1810 is displayed.
  • the identification wave ID setting instruction screen 1820 also displays the setting 1822 of the delay amount changeover switch 303.
  • the device identification apparatus 200 checks whether the identification adapter 300 can be normally identified.
  • the UI control unit 211 displays a message for operating the connected electrical device 400 on the display device 202 (S1203).
  • the messages of S1201 to S1203 are displayed together on one screen.
  • the data access unit 215 refers to the sampling data at the time immediately after the OK button is pressed from the current sampling data 223.
  • the feature vector extraction unit 213 extracts a spectrum by short-time Fourier transform (S1204).
  • the feature vector comparison unit 214 compares the extracted spectrum with the reference wave of the identification wave ID 801 recorded in the identification adapter data 221 and the spectrum of the identification wave to determine whether or not they match ( S1205, S1206).
  • the comparison between the two is performed by normalizing the spectrum size of the identification adapter data 221 to the same size as the spectrum calculated from the current sampling data 223.
  • the UI control unit 211 sets the ID setting illustrated in FIG. A confirmation screen 1830 is displayed (S1207), and the process returns to S1203.
  • the data access unit 215 refers to the identification adapter data 221 and determines whether there is another identification wave ID 801 that can be used (S1208). If it is determined that there is another usable identification wave ID 801 (S1208: YES), the data access unit 215 sets the usability flag of the identification wave ID 801 to “unusable” to identify the identification wave to be used. The wave ID 801 is changed to another usable identification wave ID 801 (S1209). In response, the UI control unit 211 guides the user to change the setting to the identification wave ID 801 (S1202, reference numeral 1830 in FIG. 21).
  • the UI control unit 211 displays a completion message (reference numeral 1820 in FIG. 22) on the display device 202. This process is terminated (S1211, S1212). If it is determined in S1208 that there is no alternative identification wave ID 801 that can be used as an alternative (S1208: NO), the UI control unit 211 fails because it cannot identify any identification wave identified by any identification wave ID 801. Is displayed and the present process is terminated (S1210, S1212). With the above configuration, the electric device 400 can be reliably identified by the identification wave set corresponding to the electric device 400 connected to the identification adapter 300.
  • FIG. 13 shows an example of a flowchart of processing for identifying the identification adapter 300 and the electric device 400 and displaying the operation state
  • FIG. 14 shows an example of a flowchart of screen transition in the device identification apparatus 200.
  • the device identification apparatus 200 operates the electrical device 400 connected to the system from the current waveform measured by the voltage / current measurement unit 101 provided on the distribution board 100 for the identification adapter 300 and the electrical device 400 specified by the user. Identify whether or not
  • FIGS. These device operation status display screens are displayed on the display device 202 of the device identification device 200 by the UI control unit 211.
  • the device operation status display screen includes an identification result screen (FIG. 24: 1910) and a display device change screen (FIG. 25: 1920).
  • the UI control unit 221 first displays an identification result screen (FIG. 24: 1910). On the operating device identification result display screen 1910, a graph 1911 representing the operating status of the identified electrical device 400 and a device name 1912 being displayed are displayed. In S1302, it is determined whether the user has pressed the display end button 1914. If it is determined that the user has pressed the display end button 1914 (S1302: YES), the UI control unit 221 ends this process (S1306).
  • the UI control unit 221 determines whether the user has pressed the display device change button 1913 (S1303). When it is determined that the user has pressed the display device change button 1913 (S1303: YES), the UI control unit 221 switches the display screen of the display device 202 to the display device change screen 1920 (S1304). In the display device change screen 1920 illustrated in FIG. 25, the display flag 1921 indicates whether or not each electric device 400 can be displayed by “YES” and “NO”. When the user selects a desired display flag 1921 and corrects “YES” or “NO” of the display flag 1921 corresponding to each device 400, the electric device 400 that displays the operation status can be switched.
  • the data access unit 215 updates the display availability flag of the identification adapter data 221 and the electrical device data 222 when the OK button 1922 is pressed as a result of the determination of whether or not the user has modified according to S1304. (S1305).
  • the process returns to S1301, and the UI control unit 221 updates the operation status display screen 1910 according to the updated data.
  • FIG. 26 shows an example of the operation status display screen 1910 after the update process in S1305.
  • the operation status of “TV” is added to the operation status display screen 1910.
  • the identification system 1 of the present embodiment the operation status can be displayed for each electrical device 400 whose operation status is identified. Moreover, according to a user's request, the electric equipment 400 which displays an operation condition can be selected.
  • the operation device identification result display processing (S1301) in the operation status display processing flow illustrated in FIG. 13 will be described in detail.
  • the data access unit 215 refers to the identification adapter data 221 and the electrical device data 222, and the display availability flags 810 and 911 are “YES”.
  • the identification adapter 400 (identification wave) and the electric device 400 are listed (S1401).
  • the data access unit 215 retrieves one of the sampling data with reference to the current sampling data 223, and the feature vector extraction unit 213 extracts a spectrum by short-time Fourier transform (S1402).
  • the feature vector comparison unit 214 selects one of the display-designated identification adapter 300 and the electric device 400 listed in S1401 (S1403). Then, the feature vector comparison unit 214 compares the corresponding identification wave with the spectrum extracted in S1402 and determines whether or not they match (S1404, S1405). The comparison between the two is performed by normalizing the size of each spectrum of the identification adapter data 221 and the electrical equipment data 222 to the same size as the spectrum calculated from the current sampling data 223.
  • the feature vector comparison unit 214 determines that the corresponding identification wave matches the spectrum extracted in S1402 (S1405: YES)
  • the feature vector comparison unit 214 of the electric device 400 corresponding to the identification wave that is the determination target.
  • the power value is calculated (S1406).
  • the electric power value is multiplied by the coefficient when the spectrum sizes are aligned in S1404 based on the electric power value 909 of the electric device data 222 and in the case of the identification adapter 300 based on a predetermined fixed value. calculate. For example, when the spectrum calculated from the current sampling data 223 matches a certain spectrum of the electrical equipment data 222 and the size is 1.5 times this spectrum, the power is stored in the electrical equipment data 222. Calculation is performed by multiplying the power corresponding to the spectrum by 1.5.
  • the feature vector comparison unit 214 determines whether the processing target is the electric device 400 or the identification adapter 300 (S1407).
  • the processing target is the identification adapter 300 (S1407: YES)
  • the feature vector comparison unit 214 uses the reference wave corresponding to the identification wave used in the identification adapter 300 for the power value calculated in S1406.
  • Processing is performed (S1408).
  • the “correction processing using the reference wave” is correction means for calculating a correct power value in consideration of the attenuation of the identification wave due to the influence of the impedance of the power supply line 120 described above.
  • the correction value corresponding to the reference wave is not set in the electric device 400, and thus the power value is not corrected. Then, the process proceeds to S1409.
  • step S1409 the feature vector comparison unit 214 determines whether there are other electrical devices 400 designated for display. If it is determined that there are other electrical devices 400 (1409: YES), the processing from step S1403 is repeated to display The same process is performed for all the electrical devices 400 that have been designated. If it is determined that the processing for all the display-designated devices has been completed (S1409: NO), this processing ends (S1410).
  • the operation status is grasped for all the electric devices 400 designated for display by the user, and the electric device 40 specified by the identification adapter 300 is The power consumption is corrected in consideration of the impedance of the power supply line 120.
  • FIG. 15 is a flowchart showing an example of a current waveform registration process flow of the electric device 400, and FIGS. 27 to 29 show examples of operation screens displayed on the display device 202 of the device identification device 200.
  • the current waveform is sampled every time this process is executed.
  • the current sampling data 223 is data that has been sampled immediately before the start of the process. You may refer to the data recorded in
  • the UI control unit 221 When the process illustrated in FIG. 15 is started (S1500), the UI control unit 221 first specifies the name of the electric device 400 input by the user via the instruction input unit 203, as shown in the electric device data 900 (FIG. 9). 222) is registered in the registered device name 910 (S1501). When the name registration is completed, the measurement control unit 212 samples the alternating current waveform on the power supply line 120 (S1502). The current waveform sampled at this point is the current waveform of the entire system when the electric device 400 to be registered is not operating.
  • the UI control unit 211 displays a message screen 2010 (FIG. 27) for instructing the display device 202 to turn on the electric device 400 (S1503).
  • a message is displayed so that the OK button 2011 is pressed after the electric device 400 is operated.
  • the current waveform is sampled after the electric device 400 is reliably operated. Since the current waveform may change greatly immediately after the electric device 400 is activated, it may be possible to wait for the current waveform to stabilize after several seconds to several tens of seconds until sampling starts.
  • the measurement control unit 212 waits for the user to press the OK button 2011 on the current waveform learning screen 2010 in S1504 (S1504: NO), and determines that the user has pressed the OK button 2011 (S1504: YES).
  • the measurement control unit 212 again samples the current waveform (S1505).
  • the current waveform sampled here is the current waveform of the entire system in which the electric device 400 is operating.
  • the measurement control unit 212 obtains a difference from the current waveform of the entire system sampled in S1502 before the electric device 400 is operated (S1506). This difference is a current waveform that characterizes the electric device 400.
  • the feature vector extraction unit 213 performs a short-time Fourier transform process on the current waveform, and extracts a spectrogram (S1507).
  • the feature vector comparison unit 214 selects the top three spectra having the highest power from the spectrogram extracted in S1507, and temporarily registers them in the electrical device data 900 as the feature vectors of the electrical device 400 ( S1508).
  • the feature vector comparison unit 214 tests whether or not the device can be identified from the current waveform of the entire system using the selected spectrum (S1509).
  • S1509 If identification is not possible in S1509 (S1510: NO), the spectrum selected in S1508 may be difficult to identify due to the influence of the current waveform of the other electrical device 400. Then, the spectrum having the next highest power is selected again (S1511), and the process returns to the device identification test step of S1509.
  • the feature vector comparison unit 214 uses the identification wave whose spectrum is already used in the identification system 1 as the spectrum of the electric device 400. It is confirmed whether there is no interference with the feature vector (S1512). The processing in this step is executed for the same purpose as the check of usable identification waves exemplified in the flowchart of FIG. 11, and the current waveform of the electric device 400 to be registered is converted to the existing identification adapter 300. It is investigated whether it interferes with the identification wave which generate
  • FIG. 16 is a flowchart illustrating an example of an interference check processing flow with an identification wave. In this process, it is checked whether or not the feature vector of the electric device 400 interferes with the identification wave in use for all the spectra constituting the spectrogram of the electric device 400. "
  • the feature vector comparison unit 214 selects the spectrum of the first section from the spectrogram of the electric device 400 (S1601).
  • the first section is a section specified by reference numeral 531 illustrated in FIG.
  • the feature vector comparison unit 214 refers to the identification adapter data 222 and checks whether there is an identification wave in the same section as this spectrum (S1602).
  • the feature vector comparison unit 214 compares the selected spectrum with the spectrum of the identification wave (S1603), and discriminates from the selected spectrum. Check for possible interference with the wave spectrum. When it is determined that the selected spectrum matches the spectrum of the identification wave (S1604: YES), the feature vector comparison unit 214 sets the identification wave availability flag 809 in the identification adapter data 800 to “unusable” ( S1605), the process proceeds to S1606.
  • the feature vector comparison unit 214 checks whether other spectra are recorded in the spectrogram of the target electric device 400 with reference to the electric device data 900 (S1606). When it is determined that another spectrum is recorded (S1606: NO), the feature vector comparison unit 214 selects the spectrum of the next section (S1507) and repeats the processing from S1602.
  • the feature vector comparison unit 214 ends this processing and returns the processing to the processing flow of FIG. In this way, by performing the interference check process for all the spectra of the electrical device 400, the identification wave that interferes with the current waveform of the electrical device 400 can be made “unusable”. .
  • the feature vector comparison unit 214 When the identification wave interference check process of FIG. 16 is completed, the feature vector comparison unit 214 returns the process to S1513 of the process flow of FIG. In S1513, the feature vector comparison unit 214 calculates the power value of the current waveform acquired in S1506, and registers it in the electrical equipment data 800 (222) together with the feature vector. Thereafter, the UI control unit 221 displays a completion message on the display device of the device identification apparatus 200 and ends this processing (S1514, S1515).
  • FIG. 29 shows an example of a current waveform learning completion message display screen 2030.
  • the registration process of the electric device 400 using the identification adapter 300 in the identification system 1 of the present embodiment will be described.
  • the registration process of the electric device 400 described with reference to FIGS. 13 to 15 it is necessary for the user to operate the electric device 400 in accordance with the guidance of the device identification device 200 and cause the device identification device 200 to identify the current waveform of the electric device 400. there were.
  • the registration process described below it is not necessary for the user to operate the electric device 400 for registration, so that the usability is improved.
  • the registration process extracts feature vectors only from current values measured in a short time after the operation of the electric device 400, there is a possibility that an incorrect feature vector is registered due to the influence of other electric devices 400. .
  • the feature vector is extracted for a certain time for the electric device 400 to be registered, so that the possibility of such an erroneous determination can be reduced.
  • the outline of this process is that the current waveform on the power supply line 120 is measured for a certain period after the identification adapter 300 is connected to the registered electric device 400, and the change of the measured current waveform and the change of the identification wave of the identification adapter 300 are measured. It is to compare. A component that changes at the same timing as the identification wave is extracted from each component of the current waveform, and is registered as a feature vector of the electric device 400.
  • the screen 2020 including a message indicating that the current waveform learning illustrated in FIG. 28 is being performed is displayed until the registration is completed. Since this processing illustrated in FIG. 17 is executed in the background, such a screen display is not performed.
  • a process executed with the installation of the identification adapter 300 is performed (S1701).
  • This processing is the same processing as the installation / initial setting processing of the identification adapter 300 described with reference to the processing flow example of FIG.
  • the feature vector extraction unit 213 periodically performs reference to the current sampling data 223 and short-time Fourier transform processing (S1702), and the feature vector comparison unit 214 detects the identification wave of the identification adapter 300. It is checked whether there is any (S1703).
  • the electric device 400 When the feature vector comparison unit 214 determines that the identification wave generated by the target identification adapter 300 has been identified (S1703: YES), the electric device 400 has started to operate, so the current current waveform The difference between the spectrogram and the spectrogram of the current waveform is calculated (S1704). This difference becomes a current waveform component of the electric device 400.
  • the spectrogram of the current waveform measured immediately before identifying the identification wave of the object identification adapter 300 is used until the identification wave is no longer identified, in other words, until the electric device 400 to which the object identification adapter 300 is connected does not operate.
  • the spectrogram of the electric device 400 is retained and used.
  • the feature vector of the electric device 400 can be extracted only by obtaining the difference in this way.
  • the spectrogram separated in S1704 includes the current waveform component of the electric device 400 other than the registration target, so let's register it. There is a possibility that an incorrect feature vector is extracted for the electrical device 400.
  • the change in the size of each spectrum with the passage of time is compared with the change in the magnitude of the identification wave.
  • a spectrum that changes differently from the identification wave is determined as a component unrelated to the electric device 400 and is excluded from the feature vector candidates, so that the components of the electric device 400 can be narrowed down.
  • the feature vector extraction unit 213 determines that an identification wave has been identified for the first time in this processing flow (S1705: NO)
  • a large difference is detected in a section where the spectrum has changed by a certain threshold or more, that is, in the difference acquisition process in S1704.
  • the generated portion is selected as a feature vector candidate of the electric device 400 (S1706).
  • S1708 it is determined whether a predetermined measurement time has elapsed, and if it is determined that the predetermined measurement time has not elapsed (S1708: NO), the feature vector extraction unit 213 returns the processing to S1702 and samples the current waveform again. Reference data.
  • the feature vector extraction unit 213 determines that the identification wave has been continuously identified (S1705: YES)
  • the feature vector candidate selected in S1706 is compared with the change in the power of the identification wave.
  • the feature vector is determined to be a current waveform component of another electrical device 400 and is deleted from the feature vector candidates. By repeating this process for a certain time, only the components of the electric device 400 to be registered are extracted.
  • the feature vector extraction unit 213 selects the top three most powerful powers from the remaining feature vector candidates, The feature vector of the electric device 400 is registered in the electric device data 900 (S1709). Further, the data access unit 215 calculates the power value of the current waveform and registers it in the electric equipment data 900 (S1710).
  • the identification system 1 can identify the electrical device 400 without the identification adapter 300. Therefore, the UI control unit 211 displays a message on the display device 202 of the device identification device 200 that the registration of the new electric device 400 is completed and that the identification adapter 300 may be removed, and ends this processing. (S1711, S1712).
  • the current waveform of each electrical device 400 is accurately registered in the device identification apparatus 200 without the user having to start and end the operation of the electrical device 400 every time the electrical device 400 is registered. can do.
  • an identification system 1 according to a second embodiment of the present invention will be described.
  • the identification adapter data 221 (800), the electric device data 222 (900), and the current are connected to the data server that is communicably connected to the device identification device 200 connected via the communication network.
  • a configuration example for storing the sampling data 223 will be described.
  • FIG. 30 shows a configuration example of the device identification system 1 according to the second embodiment of the present invention.
  • the device identification device 200 is connected to a data server 2110 via a communication network 2150 so as to be communicable.
  • the communication network 2150 is typically an open network such as the Internet, but may be a private network such as a LAN laid in a company.
  • the data server 2110 has a form in which a processor 2111, a memory 2112, an auxiliary storage interface 2113, and a network interface 2114 are coupled to each other via an internal bus so that they can communicate with each other.
  • the auxiliary storage interface 2113 includes a circuit for connecting an auxiliary storage device 2118 such as an HDD to the internal bus.
  • the auxiliary storage device 2118 holds identification adapter data 2115, electrical device data 2116, and current sampling data 2117.
  • the device identification apparatus 200 holds the identification adapter data 221, the electric device data 222, and the current sampling data 223 in the auxiliary storage device 209 in that the network interface 2160 is coupled to the internal bus. Except for this point, the configuration is the same as that of the device identification apparatus 200 of the first embodiment illustrated in FIG. Other configurations have the same functions as the configurations denoted by the same reference numerals shown in FIG. 2 and have not been described.
  • the network interface 2160 is connected to the data server 2110 via the communication network 2150, and registers, deletes, and updates the identification adapter data 2115, the electrical device data 2116, and the current sampling data 2117 with respect to the data server 2110.
  • the auxiliary storage device 109 can be configured with an inexpensive ROM, and the manufacturing cost of the device can be reduced.
  • the current sampling data 223 for a longer period can be stored.
  • data having a high access frequency is stored in the device identification apparatus 200. May be.
  • the auxiliary storage device 109 of the device identification device 200 can be realized at a low cost and can store current sampling data for a longer period. The cost can be reduced while making it more convenient to use.
  • an identification system 1 according to a third embodiment of the present invention will be described.
  • a device identification device 200 that performs operation / display using an operation / display terminal connected via a communication network will be described.
  • FIG. 22 shows a configuration example of the identification system 1 according to the third embodiment of the present invention.
  • the device identification apparatus 200 is connected to the operation / display terminal 2210 via the communication network 2150.
  • the communication network 2150 is typically a private network such as a LAN that connects the operation / display terminal 2210 and the device identification apparatus 200 in a communicable manner, but may be an open network such as the Internet.
  • the operation / display terminal 2210 is configured such that a processor 2211 such as a CPU, a memory 2212, a display device 2213, an instruction input unit 2214, an I / O interface 2215, and a network interface 2216 are coupled to each other via an internal bus so as to be able to communicate with each other. .
  • a processor 2211 such as a CPU, a memory 2212, a display device 2213, an instruction input unit 2214, an I / O interface 2215, and a network interface 2216 are coupled to each other via an internal bus so as to be able to communicate with each other.
  • the difference between the device identification apparatus 200 of the present embodiment and the first embodiment is that the display device 202 and the instruction input unit 203 are not provided, and the operation / display terminal 2210 connected via the communication network 2150 The operation and display from the user is performed.
  • Other configurations have the same functions as the configurations denoted by the same reference numerals shown in FIG. 2 and have not been described.
  • the operation / display terminal 2210 does not have to be configured as a dedicated terminal of the identification system 1 as long as the operation / display terminal 2210 has the above-described configuration.
  • the operation / display terminal 2210 can be configured as a personal computer, a smartphone, or a television having a network function. In FIG. 31, only one operation / display terminal 2210 is shown, but a plurality of operation / display terminals 2210 may be provided.
  • the user can be anywhere as long as the operation / display terminal 2210 can communicate with the device identification device 200 via the communication network 2150.
  • the operation status of the electric device 400 can be confirmed, and convenience as the identification system 1 is improved.
  • the device identification device 200 can be configured at low cost.
  • the device identification device 200 when the user operates the device identification device 200 or confirms the measured operation status of the electric device 400, it is necessary to move to the installation location of the device identification device 200. If the operation / display terminal 2210 is provided, the device identification apparatus 200 can be operated from anywhere or the measurement result can be referred to. Therefore, the user-friendly identification system 1 can be provided.
  • FIG. 32 shows a configuration example of the identification system 1 according to the fourth embodiment.
  • the device identification apparatus 200 is connected to the operation / display terminal 2210 and the data server 2110 via the communication network 1450.
  • the details of the constituent elements have the same functions as the configurations denoted by the same reference numerals shown in FIGS. 2, 30, and 31 described above, and thus the description thereof is omitted.
  • the device identification apparatus 200, the operation / display terminal 2210, and the data server 2110 are connected to the same communication network 1450. However, the operation / display terminal 2210 and the data server 2110 are connected to different communication networks. It may be connected to the device identification device 200.
  • This embodiment has the advantages of both the second embodiment and the third embodiment, and the auxiliary storage device 109 can be configured by an inexpensive ROM, and the display device 202, the instruction input unit 203, and The device identification apparatus 200 can be configured at low cost in that the I / O interface 104 is omitted.
  • the operation / display terminal 2210 can communicate with the device identification apparatus 200 via the communication network 1450, the user can check the operation status of the electric device 400 from anywhere and the convenience is improved.
  • data with a high access frequency is considered in consideration of the time taken to store and read the identification adapter data 2115, the electrical equipment data 2116, and the current sampling data 2117 in the data server 2110. May be stored in the device identification apparatus 200.
  • the device identification device 200 can be realized at low cost, and the user does not need to move to the installation location of the device identification device 200. Since the device identification apparatus 200 can be operated and the measurement result can be referred to, the device identification system 1 that is convenient for the user can be provided.
  • FIG. 33 shows a configuration example of the identification adapter 300 according to the fifth embodiment of the present invention.
  • the difference from the identification adapter 300 according to the first embodiment is that the outlet 310 in the configuration of the identification adapter 300 shown in FIG. 3 is not provided, but instead the direct-current power of the output of the AC-DC power supply circuit 2401 is used as the AC adapter plug 2403. Is supplied to the electric device 400 connected to the.
  • the AC-DC power supply circuit 2401 also supplies power to the identification adapter 300 itself.
  • Other configurations of the identification adapter 300 of the present embodiment are the same as the configurations of the identification adapter in the first to fourth embodiments.
  • an external AC adapter is often used. Therefore, by including the rectification / step-down function in the identification adapter 300, the trouble of connecting the AC adapter and the identification adapter 300 can be saved. it can.
  • the output of the AC adapter has various voltages and currents, but the identification adapter 300 provides several outputs with different voltages and currents in the AC-DC power supply circuit 2401, and these are switched by the output voltage switch 2402. Can be made.
  • a direct current can be directly supplied to the electric device 400 to be connected, and therefore the identification system 1 that is easy to use for the user can be provided.
  • the identification waves described in the above embodiments are all superimposed with the same period as that of the alternating current, but this is not necessarily limited.
  • the identification wave may be superimposed once in N periods.
  • Such a method can be realized, for example, by providing a counter in the identification adapter 300 to count the AC cycle and superimposing only once every N times.
  • a process may be performed in which a current waveform having N cycles is sampled and the presence / absence of an identification wave is confirmed for each cycle. Since the identification wave is superimposed once in N cycles, the power consumed by the identification adapter 300 can be reduced.
  • this invention is not limited to the above-mentioned Example, Various modifications are included.
  • the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
  • a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
  • each of the above-described configurations, functions, processing units, processing steps, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit.
  • control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

Le problème décrit par la présente invention est de pourvoir à un système d'identification de dispositif électrique susceptible de surveiller aisément et avec grande précision un état de fonctionnement d'un dispositif électrique sans nécessiter d'opération d'utilisateur fastidieuse de réglage et d'enregistrement d'un dispositif à mesurer. La solution selon l'invention porte sur un système d'identification de dispositif électrique (1) permettant d'identifier individuellement les uns des autres une pluralité de dispositifs électriques (400) connectés à une alimentation en courant alternatif (110) et de surveiller les états de fonctionnement, ledit système étant équipé d'un adaptateur d'identification (300) et d'un dispositif d'identification de dispositif électrique (200). L'adaptateur d'identification (300) génère des ondes d'identification avec une amplitude proportionnelle au courant consommé par le dispositif électrique (400) connecté à celui-ci, attribue les ondes d'identification générées à une pluralité de zones établies de manière discrète à des intervalles de temps constants à partir d'un point de passage par zéro d'une forme d'onde de courant alternatif, et superpose les ondes d'identification sur le courant fourni à partir de l'alimentation en courant alternatif (110). Le dispositif d'identification de dispositif électrique (200) obtient la forme d'onde de courant de l'alimentation en courant alternatif (110), extrait des vecteurs de caractéristiques dans des périodes correspondant aux zones, et compare les vecteurs de caractéristiques avec les vecteurs de caractéristiques des ondes d'identification dans les zones respectives, identifiant ainsi les dispositifs électriques (400) individuellement les uns des autres.
PCT/JP2012/083133 2012-12-20 2012-12-20 Système d'identification de dispositif électrique, générateur de signal d'identification de dispositif électrique et dispositif d'identification de dispositif électrique Ceased WO2014097458A1 (fr)

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