JPS6018770A - Digital insulation resistance meter - Google Patents

Abstract

PURPOSE:To enable automatic printing out of measured values and measuring date eliminating handwriting while allowing the morization of the measured values by providing a microcomputer, a listing device and corresponding execution keys. CONSTITUTION:This insulation resistance meter is equipped with a listing device 11 for printing out the results of calculation with a microcomputer 9, a print out execution key 12a which is used to print out an insulation resistance value calculated and measured with the listing device 11 while getting it memorized into the computer 9, a memory call execution key 12b which is used to display the measured values stored in the computer 9 on a digital display 10 while printing it out and a measuring data print out execution key 12d which is used to memorize the data of measurement while printing it out. The operation of the execution keys 12a and 12d enable automatic printing out of the measured values and measuring data eliminating handwriting while allowing the memorization of the measured values.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a digital insulation resistance network.

Configuration of conventional example and its problems This type of conventional digital insulation resistance meter is used as a maintenance instrument to maintain safety, but when performing an insulation resistance test using this insulation resistance meter, The test results must be recorded and stored for five years.

In this case, unless the conventional insulation resistance reduction wrist device is added, the person performing the test must write down the measured values and the date of measurement by hand, which is very time-consuming for the tester. This method has the problem that it takes a lot of time.

Purpose of the Invention In view of the above-mentioned conventional problems, the present invention provides a method for automatically printing out measured values and measurement dates without having to be handwritten by the person conducting the test, and in which the measured values are memorized. To provide a digital insulation resistance meter that can digitally display the measurement results stored as many times as necessary for submission to related offices, for storage by parties, etc., and can also automatically print out. The purpose is to

Structure of the Invention In order to achieve the above object, the present invention provides a measurement terminal circuit consisting of a DC constant voltage power source, a measurement terminal voltage detection resistor connected to the DC constant voltage source, a pair of measurement terminals, and a measurement current detection resistor. , an analog multiplexer for sequentially inputting the voltage outputs generated in the respective detection resistors to the A/D converter, and A for A/D converting the voltage outputs sequentially selected by the analog multiplexer and inputting them to the microcomputer. A/D converter, a microcomputer that calculates the insulation resistance by processing the A/D converted signal, a digital display that digitally displays the calculation results of the microcomputer, and a printout of the calculation results of the microcomputer. a wrist device to print out, a printout execution key for printing out the insulation resistance value calculated and measured by the microcomputer on the wrist device and storing it in the microcomputer, and a digital display for displaying the measured value stored in the microcomputer. It is equipped with a memory call execution key for sequentially displaying and printing out on the wrist device, and a measurement date printout execution key for storing the calculated measurement date in the microcomputer and printing out the measurement date on the wrist device. According to this configuration, by operating the printout execution key and the printout execution key, the measured value 6 ;-
] and the date of measurement can be automatically printed out, and as a result, there is no need for the person conducting the test to write down the measured values and date of measurement by hand, so the work efficiency is extremely streamlined. In addition, by operating the memory call execution key, the measurement results stored in the microcomputer can be displayed digitally as many times as desired, and can also be automatically printed out.
Measurement results can be recorded and saved easily and reliably.
Moreover, the insulation resistance can be easily controlled throughout.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows the circuit configuration of a digital insulation resistance meter according to an embodiment of the present invention, including measurement terminal voltage detection resistors 3a and 3b, a pair of measurement terminals 4 and 6, and a measurement current detection resistor 6. It is composed of. 7 is an analog multiplexer for sequentially inputting the voltage output generated at the measurement terminal voltage detection resistor 6 vanes sa, sb and the voltage output generated at the measurement current detection resistor 6 to the A/D converter 8; /D converter 8
The analog multiplexer 7 sequentially selects, that is, the ordered voltage outputs are A/D converted and input to the microcomputer 9. The microcomputer 9 processes the A/D converted signals and calculates the insulation resistance. 10 is a digital display for digitally displaying the calculation results by the microcomputer 9; 11 is a wrist device for printing out the calculation results by the microcomputer 9; 12 is a matrix circuit for inputting numbers and functions; This matrix circuit 12 prints out the insulation resistance value calculated and measured by the microcomputer 9 using the wrist device 11, and also prints out the insulation resistance value calculated and measured by the microcomputer 9.
A printout execution key 12a for storing the measured values in the computer 9, and a memory call execution key 12b for sequentially displaying the measured values stored in the microcomputer 9 on the digital display 11 and printing them out on the wrist device 11. , a date setting execution key 12C for storing the calculated measurement date in the microcomputer 9, and a measurement date printout execution key 12d for printing out the measurement date on the wrist device 2.

The operation will be explained using the circuit configuration shown in FIG. 1 and the flowchart shown in FIG. 2. When the insulation resistance to be measured Rx is connected to the measurement terminal 4.5, the measurement terminal voltage detection resistance 3a,
3b and the measurement current detection resistor 6 generates a voltage. The voltage is sequentially inputted to an A/D converter 8 by an analog multiplexer 7, and then sequentially subjected to analog/digital conversion by the A/D converter 8, and the converted signals are sequentially inputted to a microcomputer 9. Then, the microcomputer 9 calculates the insulation resistance by processing the sequentially input signals.
At the same time, data for digital display and printout is generated in the RAM, and a printout check flag PF is set. At this time, if you want to record the measurement results in real time,
Input the printout execution key 12a. Thereby, the microcomputer 9 checks whether or not the PF is set, and if it is set, outputs the numbered printout data of the measurement results to the wrist device 11. Then, the wrist device 11 receives data from the microcomputer 9 - w I LI
Print out in the format LJ a b c d LJ M OHM Ll. At the same time, if real-time recording is executed, the data number is read in the RAM, the data is stored, and a memory call check flag MF is set. The measurement results recorded in real time in this way are stored one after another in the RAM with a ``number''. Now, if you take measurements at various places and need to store the 1jll+ results stored in the procedure described in 2 or to submit them to related agencies, you can input the memory call execution key 12b. , the microcomputer 9 checks whether MF is set 9 ,
- If it is set, the measurement results stored in the RAM are generated for digital display, and sequentially output to the digital display 10 and sequentially to the wrist device 11. The wrist device 11 receives data sequentially output from the microcomputer 9.
b c -d UMOHM w.

Row 2 Uub a c a duMo HMLJ,,
,,,,,,low 10 uc a @ d bL-
Print out in the stored order in the format JMOHM'u. Furthermore, if you want to record the measurement date together with the measurement result, input the date by pressing the set execution key 120,
Then in September.

By inputting the day (5), o (representing 1958), Sono, (6) (representing June), D+B<2e (representing day) using the numerical keys, the following microcomputer 9
The date of measurement is stored in the RAM of , a date setting check flag DF is set, and the set date is displayed on the digital display 1o. After that, by inputting the measurement date printout execution key 12d, the microcomputer 9
Checks whether the DF is set, and if it is set, the date data stored in the RAM is transferred to the list device 11.
Output to. This wrist device 11 receives data from the microcomputer 9 and prints out the set measurement date in the form of RORORO 58, 06, 260 口口口.

Effects of the Invention As described above, according to the present invention, there is provided a printout device that prints out calculation results by a microcomputer, and a wrist device that prints out insulation resistance values calculated and measured by the microcomputer and stores them in the microcomputer. an out execution key, a memory call execution key for sequentially displaying the measured values stored in the microcomputer on a digital display and printing them out on a wrist device, and a memory call execution key for causing the microcomputer to store the calculated and measured date and for the daily measurement date. 11. Measurement date and date can be automatically printed by operating the printout execution key and the date. As a result, there is no need for the person performing the test to handwrite the measured values and measurement dates, making the work extremely streamlined and requiring only the use of the old memory call execution key. By doing this, the measurement results stored in the microcomputer can be displayed digitally as many times as desired, and can also be automatically printed out, making it possible to easily and reliably record and save measurement results. Moreover, the insulation resistance can be easily controlled throughout.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram of a digital insulation resistance meter showing an embodiment of the present invention, and FIG. 2 is a flowchart of the same insulation resistance meter. 1...DC constant voltage power supply, 2...Measurement terminal circuit, 3a, 3b...Measurement terminal voltage detection resistor, 4, 5...Pair of measurements Terminal, 6...
Measurement current detection resistor, 7... Analog multiplexer, 8... A/D converter, 9... Microcomputer, 10... Digital display, 11 ......Wrist device, 12a...mark/printer)/execution key, 12b...memory call execution key, 12c...date set execution key, 1
2d... Measurement date printout execution key. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 2 Mr. Commissioner of the Japan Patent Office ■ Display of the case 1986 Patent Application No. 126423 2 Name of the invention Digital insulation resistance meter 3 Person making the amendment Relationship to the case Patent application Person in charge Location Oaza, Kadoma City, Osaka Prefecture Kadoma 1006 address name (
582) Matsushita Electric Industrial Co., Ltd. Representative: Toshihiko Yamashita 4 Agent Address: Matsushita Electric Industrial Co., Ltd., 1006 Kadoma, Kadoma City, Osaka Prefecture, Japan [Contact number: Tokyo Law Branch, 437-1121]
6.Drawing to be amended 2-1/7.Contents of amendmentThe attached drawing, Figure 2, will be amended as shown in the attached sheet.

Claims (1)

[Claims] A measurement terminal circuit consisting of a DC constant voltage power supply, a measurement terminal voltage detection resistor connected to this DC constant voltage power supply, a pair of measurement terminals and a measurement current detection resistor, and the voltage output generated at each of the detection resistors are sequentially A/D conversion is performed between an analog multiplexer for inputting to the A/D converter and an A/D converter for A/D converting the voltage outputs sequentially selected by the analog multiplexer and inputting them to the microcomputer. Calculate the insulation resistance by processing the signal - J
- a microcomputer, a digital display for digitally displaying the calculation results by the microcomputer, a wrist device for printing out the calculation results by the microcomputer, and a wrist device for displaying the insulation resistance value calculated and measured by the microcomputer. a printout execution key for printing out and storing it in the microcomputer; a memory call execution key for sequentially displaying the measured values stored in the microcomputer on a digital display and printing them out on a wrist display; Digital % type % equipped with a date printout execution key that stores the date in the microcomputer and prints out the measurement date on the wrist device.