JP2009033861A - Power supply sequence measuring apparatus and power supply sequence measuring method - Google Patents

Abstract

[PROBLEMS] With regard to the overall controller of a device having a plurality of voltage systems, anyone can easily and quickly execute a power supply sequence with a system having a simplified configuration without using an oscilloscope that requires a large device / environment and enormous effort. A power supply sequence measurement apparatus and a power supply sequence measurement method that enable observation are provided.
SOLUTION: It comprises an analog switch 3, an ADC 4, a CPU 6 having sequence information (ROM: corresponding to storage means) 7, an LCD 5, etc., and a data storage memory (RAM) 8. The analog switch 3 is an analog input from a CTL 2. Since the analog input selected by the analog switch 3 is repeatedly A / D converted by the ADC 4 and sent to the CPU 6, the number of A / D converters is not required for each measurement target. The configuration for observing the power supply sequence can be simplified.
[Selection] Figure 1

Description

  The present invention relates to a power supply sequence measuring apparatus and a power supply sequence measuring method, and more particularly to a power supply sequence measuring apparatus and a power supply sequence measuring method for measuring a power supply sequence of a controller having a plurality of voltage systems.

  As a conventional multi-channel measurement device, there is known a multi-channel measurement device that measures each measurement target at an optimum timing in consideration of measuring a plurality of completely different measurement targets having no temporal relationship. (See, for example, Patent Document 1). Further, a multi-channel AD converter reading method has been proposed in which the processing time at the time of channel switching is shortened and the processing performance is improved (see, for example, Patent Document 2). A power supply sequence detection device and a power supply capable of detecting a power supply sequence abnormality between the power supply unit and the power supply unit by detecting a power supply sequence abnormality (undervoltage or overvoltage power supply abnormality) in the power supply unit A sequence detection method has been proposed (see, for example, Patent Document 3). In addition, when confirming the control signal and response signal for sequence control exchanged between the control unit and the controlled unit, even if each of the control unit and the controlled unit is a single unit, the sequence can be confirmed. An evaluation device has been proposed (see, for example, Patent Document 4).

Also, in an image forming apparatus having a plurality of voltage systems, each voltage system of the controller starts up in turn when the main power is turned on or when returning from the energy saving mode, but at the specified voltage level in the order and timing as designed. You have to check if it has reached. One of the means is to measure with an oscilloscope.
JP 2006-071445 A Japanese Patent No. 2507149 JP 2000-188829 A JP 2004-264974 A

  However, the above techniques have the following problems. When using an oscilloscope, the device itself is large-scale, environment setting is difficult, and the usage is complicated. In addition, there are many oscilloscope channels with 4 channels, and measuring each voltage of equipment with a voltage system with dozens of patterns in 4 channels requires a huge amount of man-hours and is complicated. . In addition, there is a problem in that a determination result may be broken due to a determination error or a person because a human performs OK / NG determination of the measurement result. These problem solutions are required not only in design zones but also in various scenes including production zones such as factories. Further, the multi-channel measuring device requires an A / D converter for each of a plurality of objects to be measured, and the configuration of the device is complicated.

  The present invention has been made in view of such a situation, and with regard to the overall controller of a device having a plurality of voltage systems, the configuration is simplified without using an oscilloscope that requires a large-scale device / environment and enormous effort. The purpose of this system is to make it possible for anyone to observe power supply sequences quickly and easily.

  According to the first aspect of the present invention, A / D conversion means for converting input analog data into digital data and analog data to be sent to the A / D conversion means among at least one analog data are switched and selected. A power supply comprising: analog data switching means; control means for controlling the entire apparatus; and measurement data storage means for storing data converted into digital data by the A / D conversion means as measurement data It is a sequence measurement device.

  According to a second aspect of the present invention, in the power supply sequence measuring apparatus according to the first aspect, the analog data is a voltage system of a controller provided in the image forming apparatus.

  According to a third aspect of the present invention, in the power supply sequence measurement apparatus according to the first or second aspect, the storage means for storing the sequence information, the display means for performing output display, the measurement data is compared with the sequence information, Determination means for performing OK / NG determination of measurement data, the sequence information is predetermined voltage level timing information of each channel, and the display means is a determination result (OK / NG) by the determination means Is displayed.

  According to a fourth aspect of the present invention, in the power supply sequence measuring apparatus according to the third aspect, the determination means immediately notifies NG determination by sequentially referring to the sequence information and the measurement data. To do.

  According to a fifth aspect of the present invention, in the power supply sequence measuring apparatus according to the third aspect, the power supply sequence measuring apparatus further comprises a detecting unit that detects that the measurement of all the channels has been completed, and the determination unit detects that all the measurements have been completed In such a case, OK / NG determination is performed.

  According to a sixth aspect of the present invention, in the power supply sequence measuring apparatus according to any one of the second to fifth aspects, an ON / OFF control means for performing ON / OFF control of the main power supply of the controller is provided. .

  According to a seventh aspect of the present invention, there is provided the power supply sequence measuring apparatus according to the sixth aspect, further comprising an ON / OFF control time setting means for setting an interval time T of the main power supply ON / OFF control to a predetermined time. Features.

  According to an eighth aspect of the present invention, in the power supply sequence measuring apparatus according to the sixth or seventh aspect, the ON / OFF control means enables the analog input to be measured sequentially by switching ON / OFF of the main power supply. Features.

  The invention according to claim 9 is the power supply sequence measurement device according to any one of claims 6 to 8, wherein the ON / OFF control means detects that the measurement of all channels has been completed by the detection means. The main power supply is turned ON / OFF, and the power supply sequence measurement after the second round is continuously performed.

  The invention according to claim 10 is a step of selecting any of at least one or more analog data, a step of converting the selected analog data into digital data, and a step of storing the digital data as measurement data; A power supply sequence measuring method.

  According to an eleventh aspect of the present invention, in the power supply sequence measurement method according to the tenth aspect, the measurement data is compared with sequence information including predetermined voltage level timing information of each channel stored in advance, and the measurement data The step of performing the OK / NG determination and the step of displaying the determination result (OK / NG) are provided.

  According to the present invention, with regard to the overall controller of a device having a plurality of voltage systems, anyone can easily and quickly use a system with a simplified configuration without using an oscilloscope that requires a large-scale device / environment and enormous effort. The power supply sequence can be observed.

  Embodiments of the present invention will be described below in detail with reference to the drawings. The embodiments described below are preferred embodiments of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. As long as there is no description which limits, it is not restricted to these aspects.

  FIG. 1 shows the configuration of a power supply sequence measuring apparatus 9 according to an embodiment of the present invention. Analog switch 3 as analog data switching means, ADC (A / D converter) 4 as A / D conversion means, CPU 6 as control means for controlling the whole power supply sequence measuring device, LCD etc. 5 as display means, measurement It comprises a data storage memory (RAM) 8 which is a data storage means. The CPU 6 has sequence information (ROM: corresponding to storage means) 7.

  In this configuration, an input from the CTL (controller) 2 is A / D converted by an A / D converter (ADC) 4, and the converted data is stored in the data storage memory 8.

  The analog switch 3 repeats switching of the analog input from the CTL 2. An example in which input switching is repeated with the analog switch 3 is shown in FIG. As shown in FIG. 2, the analog input selected by the analog switch 3 is A / D converted by the ADC 4 and sent to the CPU 6.

  According to the above embodiment, the number of inputs to be measured (analog input from CTL2) is switched by an analog switch and conversion is performed by the A / D converter 4, so that an A / D converter for each measurement target is not required, The number of A / D converters can be reduced, and the configuration for observing the power supply sequence can be simplified. An example of the measurement timing of the power supply sequence measurement apparatus according to this embodiment is shown in FIG.

  Further, by switching the analog switch 3, it is possible to repeatedly switch the analog input, determine the OK / NG with reference to the sequence information 7 of the CPU 6 (corresponding to the determination means), and display / output on the LCD 5 or the like. obtain.

  According to the above-described embodiment, since there is no step for humans to perform OK / NG determination automatically, there are no determination variations and errors, and anyone can easily measure the power supply sequence by reducing the number of work steps. it can.

  The OK / NG determination and output timing will be described below as another embodiment. Specifically, two types can be considered which are executed sequentially for each sample or when all channel measurements are completed.

  First, an embodiment in which determination results are sequentially output will be described with reference to FIG. FIG. 3 is a flowchart showing the operation processing of this embodiment.

  The main power supply (for example, provided in CTL2) is turned on, A / D conversion is performed by the A / D converter 4, and the data is stored in the data storage memory 8 (step S1). The CPU 6 refers to the sequence information 7 and performs OK / NG determination (step S2). The determination result is displayed / outputted on, for example, an LCD 5 (step S3). If the result is OK (step S4 / Yes) and all the measurements are finished (step S5 / Yes), the measurement is finished.

  On the other hand, even if the result is OK (step S4 / Yes), if the measurement is not completed (step S5 / No), the analog switch 3 is switched (step S6) and the measurement is performed (step S2). If the determination result is NG (step S4 / No), the measurement ends immediately.

  According to the above-described embodiment, the determination results are output sequentially, so that it is immediately OK / real time in real time when the first error occurs (measurement result: NG) without waiting until the measurement of all analog inputs is completed. Can know NG judgment.

  Next, an embodiment in which a determination result is output after measuring all channels will be described with reference to FIG. FIG. 4 is a flowchart showing the operation processing of this embodiment.

  The main power supply (for example, provided in CTL2) is turned on, A / D conversion is performed by the A / D converter 4, and the data is stored in the data storage memory 8 (step S10). When all the measurements are completed (step S11 / Yes), the sequence information 7 held by the CPU 6 is referred to, and OK / NG determination is performed (step S12). The determination result is displayed / outputted on, for example, the LCD 5 (step S13), and the process ends.

  On the other hand, when the measurement is not completed (step S11 / No), the analog switch 3 is switched (step S14) and the measurement is performed (step S10).

  According to the above embodiment, by performing the determination after finishing all the measurements, the operation processing at the timing of the measurement and the determination can be divided, and the processing of the CPU can be concentrated on one side, and the two processes of measurement and determination are performed. Compared to the case where the determination is performed in parallel, the amount of determination processing is reduced, the minimum value of the sampling interval can be shortened, and a finer sample can be obtained.

  Next, a power supply sequence measuring apparatus capable of automatically turning on / off a main power supply (for example, provided in the CTL 13) and setting its timing will be described with reference to FIG. FIG. 5 is a configuration diagram of the power supply sequence measuring apparatus 19 according to the present embodiment.

  Unlike the power supply sequence measurement device 9 shown in FIG. 1, the power supply to the main power supply (CTL 13) is controlled by the ON / OFF control unit 15 (the power supply sequence measurement device 19 side CPU 10).

  According to the above embodiment, since the main power supply ON / OFF is controlled by the power supply sequence measuring device 19 side, the power supply sequence can be measured by accurately matching the ON / OFF timing with the desired timing.

  In addition, regarding the power ON / OFF interval: T (time), by changing the conditions and observing the power supply sequence at various ON / OFF timings, the contents of evaluation can be deepened and the reliability of the controller can be improved.

  Next, the operation process of the power supply sequence measuring apparatus according to another embodiment of the present invention will be described with reference to the flowchart of FIG.

  The main power supply (CTL13) is turned on, A / D conversion is performed by the A / D converter 17, and the data is stored in the data storage memory 12 (step S20). When the measurement for the set number of cycles is completed (steps S21 and S22 / Yes), the sequence information 11 of the CPU 10 is referred to, OK / NG determination is performed (step S23), and the determination result is displayed on the LCD 14 or the like. / Output (step S24) and end.

  If even one round of measurement has not been completed (step S21 / No), the main power supply (CTL13) is turned off (step S29), the analog switch 16 is switched (step S30), and the setting is made after the main power supply (CTL13) is turned off. After the interval, the main power supply (CTL13) is turned on again (step S31), and the process returns to step S20.

  When all channels have been measured, but the measurement has not been completed for the set number of times (m cycles) and the measurement is not complete (step S22 / No), the main power supply (CTL13) is turned off (step S25), and the analog switch 16 (step S26), the power ON / OFF switching interval is set again (step S27), the main power source (CTL13) is turned ON again after the set interval after the main power source (CTL13) is turned OFF (step S28), Return to step S2. An example of the measurement timing of the power supply sequence measurement apparatus according to this embodiment is shown in FIG.

  According to the above-described embodiment, sequential measurement can be performed by switching the channel to be measured in accordance with the main power ON / OFF. Therefore, a multi-channel power sequence can be measured with at least one single A / D converter. , Can be measured in exactly the same time series.

  In addition, according to the above embodiment, it is possible to automatically detect the presence or absence of an error continuously in the second, third, and so on after the first round is completed in conjunction with the main power ON / OFF.

  Note that the program for the CPU to execute the processing shown in the flowcharts of the drawings constitutes a program according to the present invention. As a recording medium for recording the program, a semiconductor storage unit, an optical and / or magnetic storage unit, or the like can be used. By using such a program and a recording medium in a system having a configuration different from that of each of the above-described embodiments and causing the CPU to execute the program, substantially the same effect as the present invention can be obtained.

  Although the present invention has been specifically described above based on the preferred embodiments, it is needless to say that the present invention is not limited to the above-described ones and can be variously modified without departing from the gist thereof.

It is a lineblock diagram of a power sequence measuring device concerning an embodiment of the present invention. It is a figure for demonstrating performing input switching by the analog switch 3 which concerns on embodiment of this invention. It is a flowchart which shows the operation | movement process of the power supply sequence measuring apparatus which concerns on embodiment of this invention. It is a flowchart which shows the operation | movement process of the power supply sequence measuring apparatus which concerns on embodiment of this invention. It is a lineblock diagram of a power sequence measuring device concerning an embodiment of the present invention. It is a flowchart which shows the operation | movement process of the power supply sequence measuring apparatus which concerns on embodiment of this invention. It is a figure which shows an example of the measurement timing of the power supply sequence measuring apparatus which concerns on embodiment of this invention. It is a figure which shows an example of the measurement timing of the power supply sequence measuring apparatus which concerns on embodiment of this invention.

Explanation of symbols

1 AC adapter 2, 13 CTL (controller)
3, 16 Analog switch 4, 17 ADC (A / D converter)
5, 14 LCD, etc. 6, 10 CPU
7, 11 Sequence information (ROM)
8,12 Data storage memory (RAM)
9, 19 Power sequence measuring device 15 ON / OFF control unit

Claims (11)

A / D conversion means for converting input analog data into digital data;
Analog data switching means for switching and selecting analog data to be sent to the A / D conversion means among the at least one analog data;
Control means for controlling the entire device;
And a measurement data storage means for storing data converted into digital data by the A / D conversion means as measurement data.   2. The power sequence measuring apparatus according to claim 1, wherein the analog data is a voltage system of a controller provided in the image forming apparatus. Storage means for storing sequence information;
Display means for performing output display;
A determination means for comparing the measurement data with the sequence information and performing OK / NG determination of the measurement data;
The sequence information is predetermined voltage level timing information of each channel,
The power supply sequence measuring apparatus according to claim 1, wherein the display unit displays a determination result (OK / NG) by the determination unit.   4. The power supply sequence measurement apparatus according to claim 3, wherein the determination means immediately notifies NG determination by sequentially referring to the sequence information and the measurement data. Provided with detection means for detecting the completion of measurement of all channels,
4. The power supply sequence measuring apparatus according to claim 3, wherein the determination unit performs OK / NG determination when the end of all measurements is detected by the detection unit.   6. The power supply sequence measuring apparatus according to claim 2, further comprising ON / OFF control means for performing ON / OFF control of a main power supply of the controller.   7. The power supply sequence measuring apparatus according to claim 6, further comprising an ON / OFF control time setting means for setting an interval time T of the main power supply to a predetermined time.   8. The power supply sequence measuring apparatus according to claim 6, wherein the ON / OFF control means enables the analog input to be measured sequentially by switching ON / OFF of the main power supply.   The ON / OFF control means turns on / off the main power supply and continuously performs power supply sequence measurement after the second round when the detection means detects that the measurement of all channels is completed. The power supply sequence measuring device according to any one of claims 6 to 8. Selecting any one of at least one or more analog data;
Converting the selected analog data into digital data;
And storing the digital data as measurement data. Comparing the measurement data with sequence information including predetermined voltage level timing information of each channel stored in advance, and performing OK / NG determination of the measurement data;
The method according to claim 10, further comprising: displaying a result of the determination (OK / NG).

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