JP2012247245A - Energy measuring unit - Google Patents

Abstract

An energy measuring unit that can easily check setting contents by displaying setting items in a list and prevents erroneous setting is obtained.
A measurement calculation unit 4 that calculates a measurement value from a current and a voltage of an electric circuit, a display unit 5 that displays a measurement value calculated by the measurement calculation unit 4 and setting contents, a measurement calculation and a display unit by the measurement calculation unit 4 Display unit control unit 7 that performs various display settings and display content switching control in FIG. 5, operation unit 8 that performs switching operation of the display unit control unit 7, and setting content storage that stores selectable setting values of setting items Via the unit 9 and the display unit control unit 7, a logging unit 6 for storing the measurement values calculated by the measurement calculation unit 4, and a memory for reading the setting data from the storage medium and writing the logging data and the setting data to the storage medium A medium control unit 10 is provided, and after the setting data is read out by the storage medium control unit 10, at least phase line type, primary voltage, and primary current setting data are displayed on the display unit 5.
[Selection] Figure 1

Description

  The present invention relates to an energy measurement unit that measures, for example, the voltage and current of a three-phase AC circuit and calculates the amount of electricity such as voltage, current, power, reactive power, power factor, and frequency. It is equipped with a logging display unit that displays measured values and saves them in time series.

  A conventional energy measurement unit has a display unit that switches between a measurement setting menu screen and a setting content display screen that display a list of setting items such as a phase wire type, a primary voltage, and a primary current, and a display of a predetermined position of the display unit An operation unit for performing necessary operation processing on the item is provided. The operation unit can correspond to, for example, a front key, a rear key, or a display item at a specific position selected by the cursor, which enables the cursor to be moved in the vertical direction toward a desired display item. It has a plus key and a minus key to change the display contents. As methods for confirming the setting contents in the setting item display field and the setting contents display field in the main display unit, the following two methods have already been proposed in the conventional energy measurement unit.

  First, the first point is a method of confirming by displaying the setting item contents one by one on the main display unit. In this method, the display is switched in order until a specific setting item display field, for example, a setting item display field for the primary current, is displayed until all desired setting contents are displayed. The settings were confirmed by repeating the display process.

  The second point is a method of checking using a numerical value as a setting code. This method is to display a list of setting items on one screen by coding, that is, digitizing the setting items. Logging display for energy measurement unit that eliminates the hassle of switching screens when checking the setting details You get a unit. However, since the setting contents are coded, in order to confirm the setting contents, the codes are inquired and confirmed by the setting code table (for example, see Patent Document 1).

JP 2010-32366 A

  The conventional energy measurement unit is configured as described above, and since the number of dot matrices in the display unit is limited, a plurality of setting items cannot be displayed at a time, and only one setting item is displayed. At the same time, only the method of confirming the setting contents for each item or displaying the code could be considered. However, when setting the energy measurement unit by inserting a storage medium such as a memory card storing a plurality of different setting data into the main body and reading the setting data from the storage medium, the plurality of setting data stored in the storage medium When reading the corresponding data from the list and confirming whether it has been set in the energy measurement unit, there are problems that the conventional method takes time to check and is inefficient, and the confirmation work is troublesome because it cannot be performed intuitively. there were.

The present invention has been made to solve the above-described problems, and immediately after reading the setting data from the storage medium, the setting contents are displayed by displaying the setting contents of the phase wire system, the primary voltage, and the primary current. The object is to obtain an energy measuring unit that can be efficiently performed.

  An energy measurement unit according to the present invention includes a measurement calculation unit that calculates various measurement values from current and voltage input from an electric circuit, a display unit that displays measurement values and setting contents calculated by the measurement calculation unit, and the measurement Display unit control unit that performs measurement calculation by the calculation unit, various settings for display on the display unit, and display content switching control, an operation unit that performs switching operation of the display unit control unit, and selection of each setting item A setting content storage unit that stores possible setting values, a logging unit that stores measurement values calculated by the measurement calculation unit for a certain period via the display unit control unit, and reading setting data from the storage medium and logging to the storage medium A storage medium control unit for writing data, setting data, and the like. After the setting data is read by the storage medium control unit, the setting data for the phase wire type, primary voltage, and primary current are set. It is intended to display the data on the display unit.

  According to the energy measuring unit of the present invention, the setting contents of the primary voltage, the primary current, and the phase wire type are displayed immediately after reading the setting data from the storage medium, thereby eliminating unnecessary screen switching and checking the setting contents. Can be made more efficient.

It is a block diagram which shows an example of the connection relation and function of each part of the energy measurement unit which concerns on Embodiment 1 of this invention. It is a front view which shows an example of the external appearance of the logging display unit for energy measuring units which concerns on Embodiment 1 of this invention. It is a block diagram which shows an example of the installation example of the energy measurement unit which concerns on Embodiment 1 of this invention, and an example of a setting system. It is a block diagram which shows an example of the preservation | save area | region in a storage medium (memory card | curd) used in Embodiment 1 of this invention, and a file. It is a flowchart which shows an example of setting operation implement | achieved via the logging display unit for energy measurement units which concerns on Embodiment 1 of this invention, and its confirmation procedure. It is a figure which shows an example of the screen display transition at the time of the setting data reading of the logging display for energy measurement units which concerns on Embodiment 1 of this invention. It is a block diagram which shows an example of the preservation | save area | region in a storage medium (memory card | curd) used in Embodiment 1 of this invention, and a file. It is a figure which shows the setting copy operation implement | achieved via the logging display unit for energy measurement units which concerns on Embodiment 2 of this invention. It is a figure which shows in a flowchart an example of the setting copy operation implement | achieved via the logging display unit for energy measurement units which concerns on Embodiment 2 of this invention, and its confirmation procedure. It is a figure which shows an example of the screen display transition at the time of the setting data writing of the logging display for energy measurement units which concerns on Embodiment 2 of this invention.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the energy measurement unit according to Embodiment 1 of the present invention includes an energy measurement unit main body 100 and a logging display unit 200. The energy measuring unit main body 100 is input to the current input unit 2 that converts the input from the current transformer CT and the instrument transformer VT of the plurality of electric circuits 1 to N (only electric circuit 1 is shown in the figure) into a digital signal. A measurement calculation unit 4 that calculates various electric quantities such as voltage, current, power, reactive power, power factor, and frequency from the current value and the voltage value input to the voltage input unit 3, and a setting content storage unit 9 to be described later I have.

  The logging display unit 200 includes a display unit 5 that displays measurement values and setting items calculated by the measurement calculation unit 4 of the energy measurement unit main body 100, and time-series data of measurement calculations performed by the measurement calculation unit 4 of the energy measurement unit main body 100. A logging unit 6 for storing a predetermined period of time, a measurement calculation by the measurement calculation unit 4 of the energy measurement unit main body 100, a display unit control unit 7 for performing various settings for display on the display unit 5 and switching control of display contents, An operation unit 8 that performs a switching operation of the display control unit 7 and a storage medium control unit 10 that can read setting data from the storage medium and write to the storage medium are provided.

The setting content storage unit 9 provided in the energy measuring unit main body 100 includes a circuit name storage unit 9a that is data serving as a file name of logging data, and a phase / wire type setting that is setting data necessary for measuring and calculating the amount of electricity. The selectable set values of the respective setting items such as the storage unit 9b, the primary current setting storage unit 9c, and the primary voltage setting storage unit 9d are stored for the number of circuits. In addition, each settable data in the setting content storage unit 9 includes, for example, a three-phase three-wire type, a three-phase four-wire type, a single-phase three-wire type, a single-phase two-wire type, a primary The current setting storage unit 9c is 5A to 30 kA,
The primary voltage setting storage unit 9d is 110V to 110kV.

In FIG. 2, the display unit 5 of the logging display unit 200 displays a circuit display LED (light emitting diode) 5 a indicating a selected / displayed circuit, and measured values, setting menus, and setting contents of the selected / displayed circuit. For example, the measurement mode (a) displays the measured value, the multiplier, and the unit, and the setting mode (b) displays a list of setting menus. The operation unit 8 is a circuit switching key 8a for switching the selected circuit, a setting key 8b used when switching between the setting mode and the measurement mode, a confirmation key 8c used when determining the content of the selected item, and used when canceling the selected content. A reset key 8d for switching, a front key 8e and a rear key 8f for switching selection items, and a plus key 8g and a minus key 8h for switching selection contents.

  In FIG. 3 showing an example of a system diagram in which the energy measuring unit as described above is installed, 101 to 104 are energy measuring unit bodies, 201 to 204 are logging display units, 300 is a PC (personal computer), 400 is a storage medium ( Memory card). The energy measurement unit 101 is a single circuit, and the setting contents are a three-phase three-wire system (3P3W), a primary voltage is 6600 V, and a primary current is 30 A. The energy measurement units 102 and 103 are a single circuit, and the setting contents Is a three-phase three-wire system (3P3W), a primary voltage is 200V, and a primary current is 50A. The energy measuring unit 104 has three circuits, and the setting contents are respectively a single-phase three-wire system (1P3W). ), The primary voltage is 200V, and the primary current is 100A. At this time, the setting of these energy measurement unit main bodies is a storage medium 400 that can store setting data of each circuit of the dedicated application necessary for creating the setting data or the PC 300 installed with spreadsheet software and the energy measurement unit main bodies 101 to 104. To do. The storage medium 400 can read and write setting data and logging data with both the PC 300 and the logging display unit 200.

  As shown in FIG. 4, examples of the storage medium include a setting storage medium 401 and a logging storage medium 402. In FIG. 4, the setting storage medium 401 includes a setting data storage area 41 for storing setting data, and the setting data storage area 41 has circuit names, phase wire types, primary voltages, and primary voltage setting values for the number of circuits. A plurality of setting files 42 are saved. The logging storage medium 402 includes a logging data storage area 43 that stores logging data. The logging data storage area 43 stores a plurality of logging files 44 having logged measurement value data.

Next, an example of the setting operation and its confirmation procedure realized via the energy measurement unit logging display unit will be described with reference to the flowchart of FIG. In the flowchart showing the setting operation of FIG. 5, first, the logging storage medium 402 is taken out from the logging display unit 200 (S101), and the setting storage medium 401 is inserted into the logging display unit 200 (S102). Next, the logging display unit 200 is switched from the measurement mode to the setting mode by the setting key 8b in the operation unit 8 (S103).

  In the setting mode, first, a setting value reading menu is selected (S104). When the front key 8e and the rear key 8f are pressed, the selection items are switched on the LCD 5b in the display unit 5, and the setting file selection screen is displayed by pressing the enter key 8c in a state where setting reading is selected (FIG. 6).

  Now, a number representing the setting file is displayed on the LCD 5b. When the setting file is changed, the number of the setting file is switched every time the plus key 8g or the minus key 8h is pressed. A desired setting file is selected, and the setting file is determined by pressing the enter key 8c (S105).

  When the setting file is specified, the energy measurement unit logging display unit 200 reads and saves the setting value (S106). The setting data read from the setting storage medium 401 by the storage medium control unit 10 (FIG. 1) is transmitted to the setting content storage unit 9 (FIG. 1) of the energy measuring unit main body 100 via the display unit control unit 7 (FIG. 1). ) And exit the setting mode.

After the setting mode is completed, the mode automatically shifts to the confirmation mode, and the set values of the phase wire system, primary voltage, and primary current are displayed on the LCD 5b (S107). When changing the circuit to be checked, the circuit number is switched every time the circuit switching key 8a is pressed (S108). The circuit display LED 5a corresponding to the selected circuit is turned on, and the setting content of the circuit is displayed on the LCD 5b. The circuit name in the setting data is used as the name of the logging file.

  In the confirmation mode, pressing the setting key 8b on the operation unit 8 ends the confirmation mode (S109). After completion of the confirmation mode, the setting storage medium 401 is taken out from the energy measurement unit logging display unit 200 (S110), and the logging storage medium 402 is inserted (S111).

  As shown in FIG. 7, when the storage medium 403 having both the setting data storage area 41 and the logging data storage area 43 is used, before the setting, in the flowchart showing the setting operation of FIG. The procedure of taking out the storage medium 402 (S101) and the procedure of taking out the setting storage medium 401 after the setting is completed and inserting the logging storage medium 402 again (S110, S111) can be omitted.

  According to the present embodiment, immediately after the setting operation, the primary voltage, primary current, and phase wire type setting contents are automatically displayed, so that it is easy to check whether the intended setting data has been set, and erroneous setting Can be prevented. Further, by using the circuit name setting value in the read setting file as the name of the logging file, it becomes easy to distinguish the logging data collected from a plurality of measuring instruments.

  In terminals that can measure multiple circuits, immediately after setting operation, primary voltage, primary current, phase wire type setting contents are shown, and further, the contents set in each circuit can be switched and confirmed, Even when there are a plurality of circuits, it is easy to confirm whether the intended setting has been made.

The storage medium 400 can store a plurality of different setting data.
You do not have to bring in Since the storage medium 400 can acquire the current setting data of the energy measuring unit 100 (101 to 104 in FIG. 3) and send it to the PC 300, the setting data can be managed even when the setting data is changed on site. However, it can be easily performed on the PC 300.

  In this embodiment, the logging display unit main body is separate from the energy measurement unit. However, even if the logging display unit is built in the energy measurement unit main body, the same effects as in the present embodiment can be obtained.

Embodiment 2. FIG.
A second embodiment of the present invention will be described below with reference to FIG. FIG. 8 is an overall view of a setting copy operation realized via the energy measurement unit logging display unit according to the second embodiment of the present invention, and FIG. 9 is a flowchart showing an example of the setting copy operation. If the energy measurement unit main body 106 has not been set, the setting data of the energy measurement unit main body 105 is stored in the storage medium by the energy measurement unit logging display unit 205, and the setting data is passed through the energy measurement unit main body 206 to the energy measurement unit. The operation of copying to the main body 106 is shown.

  In the flowchart of FIG. 9 showing the setting operation, first, a storage medium is inserted into the logging display unit main body 205 (S201). Next, the logging display unit main body 205 is switched from the measurement mode to the setting mode by the setting key 8b in the operation unit 8 (S202).

  In the setting mode, first, a setting value writing menu is selected (S203). When the front key 8e and the rear key 8f are pressed, the selection items are switched on the LCD 5b in the display unit 5, and in the state where the setting writing is selected, the writing destination setting file selection screen is displayed by pressing the enter key 8c (FIG. 10).

  Now, a number representing the write destination setting file is displayed on the LCD 5b. When the write destination setting file is changed, the number of the write destination setting file is switched every time the plus key 8g or the minus key 8h is pressed. A desired writing destination setting file is selected and determined by pressing the enter key 8c (S204).

  When the designation of the writing destination setting file is completed, the energy measurement unit logging display unit 205 writes the setting value to the storage medium (S205). The setting data of each circuit stored in the setting content storage unit 9 (FIG. 1) of the energy measuring unit main body 105 is transferred by the storage medium control unit 10 (FIG. 1) via the display unit control unit 7 (FIG. 1). Write to a desired setting file in the setting storage medium, and end the setting mode.

  After the setting mode is completed, the mode automatically shifts to the confirmation mode, and the set values of the phase wire type, primary voltage, and primary current written to the storage medium are displayed on the LCD 5b (S206). When changing the circuit to be checked, the circuit number is switched each time the circuit switching key 8a is pressed (S207). The circuit display LED 5a corresponding to the selected circuit is turned on, and the setting content of the circuit is displayed on the LCD 5b.

  In the confirmation mode, pressing the setting key 8b on the operation unit 8 ends the confirmation mode (S208). After completion of the confirmation mode, the storage medium is taken out from the energy measurement unit logging display unit 205 (S209).

The same procedure as in the first embodiment is used to read the setting data from the storage medium storing the copy source setting contents via the logging display unit main body 206, and save / set it in the copy destination energy measurement unit 106. realizable.

  According to the present embodiment, the setting data set in the energy measurement unit main body 105 can be easily copied and set in another energy measurement unit main body, and labor saving of setting work can be achieved. In addition, when saving the setting data of the copy source to the storage medium and reading and setting with the copy destination terminal, the phase / line system, primary voltage, and primary current of the setting data are automatically displayed, so that the copy / Setting mistakes can be prevented.

1 electric circuit, 2 current input section,
3 Voltage input section, 4 Measurement calculation section,
5 Display section, 5a Circuit display LED,
5b LCD, 6 logging section,
7 Display unit control unit, 8 Operation unit,
8a Circuit switching key, 8b Setting key,
8c Confirm key, 8d Reset key,
8e front key, 8f back key,
8g plus key, 8h minus key,
9 setting content storage unit, 9a circuit name storage unit,
9b Phase wire set value storage unit, 9c Primary current set value storage unit,
9d primary voltage set value storage unit, 10 storage medium control unit,
41 setting data storage area, 42 setting file,
43 Logging data storage area, 44 Logging file,
100-106 energy measuring unit body,
200-206 Logging display unit for energy measurement unit,
300 PC, 400 Storage medium (memory card).

Claims (5)

  Measurement calculation unit for calculating various measurement values from current and voltage input from the electric circuit, display unit for displaying measurement values and setting contents calculated by the measurement calculation unit, measurement calculation by the measurement calculation unit and display on the display unit Display unit control unit for performing switching control of display settings, operation unit for switching operation of the display unit control unit, setting content storage unit for storing selectable setting values of each setting item, the display A logging unit for storing the measurement value calculated by the measurement calculation unit via the unit control unit, and a storage medium control unit for reading the setting data from the storage medium and writing the logging data and the setting data to the storage medium, After the setting data is read by the storage medium control unit, at least the phase wire type, primary voltage, and primary current setting data are displayed on the display unit. Energy measurement units.   2. The energy measuring unit according to claim 1, wherein the display of the setting data on the display unit after reading the setting data is automatically performed by the display unit control unit.   2. The energy measuring unit according to claim 1, wherein circuit name data is saved as a file name of a logging file among setting data read by the storage medium control unit.   The energy measurement unit according to claim 1, wherein after the setting data is written to the storage medium by the storage medium control unit, at least the phase wire type, primary voltage, and primary current setting data are displayed on the display unit. Energy measurement unit characterized by   5. The energy measurement unit according to claim 4, wherein the display of the setting data on the display unit after the setting data is written is automatically performed by the display unit control unit.

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