CN201886142U - Intelligent calibrating device for earth resistance meter - Google Patents
Intelligent calibrating device for earth resistance meter Download PDFInfo
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- CN201886142U CN201886142U CN2010206582997U CN201020658299U CN201886142U CN 201886142 U CN201886142 U CN 201886142U CN 2010206582997 U CN2010206582997 U CN 2010206582997U CN 201020658299 U CN201020658299 U CN 201020658299U CN 201886142 U CN201886142 U CN 201886142U
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Abstract
The utility model relates to an intelligent calibrating device for an earth resistance meter, comprising a high-resistance box, a conversion box and a computer. The intelligent calibrating device for the earth resistance meter is characterized in that an output interface of the high-resistance box is connected with a P0 port of a central processing unit (CPU) of the conversion box, a P2 port of the CPU of the conversion box is connected with a latch, a P1 port of the CPU of the conversion box is connected with a display screen, and a receive data (RXD) port and a transmit data (TXD) port of the CPU of the conversion box are connected with a serial port of the computer through a serial port circuit. The intelligent calibrating device for the earth resistance meter has a simple structure, is convenient to operate, and ensures that previous fussy works of manually reading, calculating and processing data are replaced by the computer so that the working efficiency is greatly improved; an in addition, actual resistance values of indicating values of each resistance dial are input into the processing data of the computer, and the calibrating precision is further improved.
Description
Technical field
The utility model relates to a kind of earth resistance meter intelligence testing device of watthour.
Background technology
The value testing of earth resistance meter all adopts resistance box to realize at present both at home and abroad, and common way is the measuring junction R with earth resistance meter
iInsert megohm box resistance output terminal R
0Shake the earth resistance meter handle and rotate the indicating value of earth resistance meter measuring disk to required calibrating, regulate each resistance dish of megohm box and make earth resistance meter galvanometer pointed 0 scale, write down the indicating value of earth resistance meter and megohm box by hand, can calculate the error of indication of earth resistance meter, carry out according to JJG366-1994 earth resistance meter vertification regulation that verification result calculates and the revision of the convention, and judge whether qualifiedly according to the verification result behind the revision of the convention, provide corresponding calibration certificate or rejection notice of verification.The value testing that uses the method to carry out earth resistance meter can only calculate and write down verification result by hand, can not realize that area of computer aided finishes verification process, operation, calculation of complex, and efficient is low.
Summary of the invention
The purpose of this utility model just provides a kind of high efficiency, good, the simple earth resistance meter intelligence testing device of watthour of operating structure of precision.
Earth resistance meter intelligence testing device of watthour of the present utility model comprises megohm box, transfer trunk and computing machine,
Be characterized in that the output interface of megohm box and the P0 mouth of transfer trunk CPU join, the P2 mouth of transfer trunk CPU links to each other with latch, and the P1 mouth of transfer trunk CPU is connected with display screen, and the RXD of transfer trunk CPU, TXD port link to each other with computer by serial by serial port circuit.
The principle of work of earth resistance meter intelligence testing device of watthour of the present utility model is: the P0 mouth of transfer trunk CPU obtains the real-time resistance of megohm box by the output interface of scanning megohm box, should real-time resistance on display screen, show through algorithm process by the P1 mouth, simultaneously the latch that connects of P2 mouth is data latching, and by serial port circuit data imported computing machine and carry out final calibrating data processing.
Earth resistance meter intelligence testing device of watthour of the present utility model is simple in structure, easy to operate, and it has realized the loaded down with trivial details work of computer generation for former artificial reading, calculating, deal with data, increases work efficiency greatly; And in the deal with data with the actual resistance of each resistance dish indicating value input computing machine, calibration accuracy is further enhanced.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
A kind of earth resistance meter intelligence testing device of watthour, comprise megohm box, transfer trunk and computing machine, the CPU that is characterized in transfer trunk selects 8031 chips of Intel Company for use, wherein the data bus of P0 mouth is connected to the output interface of resistance box by 8255 expansions, obtain the real-time resistance of resistance box, the P2 mouth is connected with the 74LS373 latch, the real-time resistance of the resistance box that obtains is latched, the P1 mouth is connected to digitron display screen, CPU shows on digitron display screen through the real-time resistance of algorithm process with resistance box, and the RXD of CPU, the TXD port realizes that by MAX232 the RS232 serial communication is connected to computing machine, and finally enters data into computing machine and examine and determine data processing.
Claims (3)
1. earth resistance meter intelligence testing device of watthour, comprise megohm box, transfer trunk and computing machine, it is characterized in that: the P0 mouth of the output interface of megohm box and transfer trunk CPU joins, the P2 mouth of transfer trunk CPU links to each other with latch, the P1 mouth of transfer trunk CPU is connected with display screen, and the RXD of transfer trunk CPU, TXD port link to each other with computer by serial by serial port circuit.
2. according to the described insulation resistance meter intelligence testing device of watthour of claim 1, it is characterized in that: the CPU of converter selects 8031 chips for use.
3. according to the described insulation resistance meter intelligence testing device of watthour of claim 1, it is characterized in that: latch adopts 74LS373.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010206582997U CN201886142U (en) | 2010-12-14 | 2010-12-14 | Intelligent calibrating device for earth resistance meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2010206582997U CN201886142U (en) | 2010-12-14 | 2010-12-14 | Intelligent calibrating device for earth resistance meter |
Publications (1)
Publication Number | Publication Date |
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CN201886142U true CN201886142U (en) | 2011-06-29 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN2010206582997U Expired - Fee Related CN201886142U (en) | 2010-12-14 | 2010-12-14 | Intelligent calibrating device for earth resistance meter |
Country Status (1)
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CN (1) | CN201886142U (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102346243A (en) * | 2011-09-22 | 2012-02-08 | 湖南省电力公司科学研究院 | Intelligent resistance box for verification |
CN105785303A (en) * | 2016-04-19 | 2016-07-20 | 国家电网公司 | Grounding ohmmeter calibrating device |
CN106443547A (en) * | 2016-10-20 | 2017-02-22 | 国家电网公司 | Intelligent insulated earth resistance meter calibrating device |
CN108710096A (en) * | 2018-08-22 | 2018-10-26 | 深圳德晋科技有限公司 | Earth-continuity tester calibrating installation |
-
2010
- 2010-12-14 CN CN2010206582997U patent/CN201886142U/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102346243A (en) * | 2011-09-22 | 2012-02-08 | 湖南省电力公司科学研究院 | Intelligent resistance box for verification |
CN102346243B (en) * | 2011-09-22 | 2014-01-22 | 湖南省电力公司科学研究院 | Intelligent resistance box for verification |
CN105785303A (en) * | 2016-04-19 | 2016-07-20 | 国家电网公司 | Grounding ohmmeter calibrating device |
CN106443547A (en) * | 2016-10-20 | 2017-02-22 | 国家电网公司 | Intelligent insulated earth resistance meter calibrating device |
CN108710096A (en) * | 2018-08-22 | 2018-10-26 | 深圳德晋科技有限公司 | Earth-continuity tester calibrating installation |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20121214 |