CN201489102U - Voltage-withstand test instrument correcting device - Google Patents
Voltage-withstand test instrument correcting device Download PDFInfo
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- CN201489102U CN201489102U CN2009200731482U CN200920073148U CN201489102U CN 201489102 U CN201489102 U CN 201489102U CN 2009200731482 U CN2009200731482 U CN 2009200731482U CN 200920073148 U CN200920073148 U CN 200920073148U CN 201489102 U CN201489102 U CN 201489102U
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Abstract
A voltage-withstand test instrument correcting device is characterized in that an input end relay module is connected with an electronic load module, wherein the electronic load module is connected with a true-RMS switching module, the input end relay module is further connected with a resistance voltage dividing module, the resistance voltage dividing module is connected with the true-RMS switching module, the true-RMS switching module is connected with an AD conversion module, the AD conversion module is connected with an ARM control chip, the ARM control chip is connected with the electronic load module, the voltage-withstand test instrument correcting device further comprises a high voltage stopping time checking module, wherein the high voltage stopping time checking module is connected with the input end relay module, the high voltage stopping time checking module is connected with the ARM control chip, and the ARM control chip is connected with the input end relay module. The voltage-withstand test instrument correcting device has the advantages that automatic measurement of a voltage-withstand test instrument can be realized, the working efficiency can be improved, and the working time can be reduced. The correcting device replaces a plurality of sets of equipment and instruments in traditional correcting work, is convenient for transportation, and is beneficial for on-line checking.
Description
Technical field:
The utility model relates to a kind of withstands voltage tester, is specifically related to a kind of withstands voltage tester calibrating installation.
Background technology:
Withstands voltage tester is the electric insulation strength tester again or is the dielectric strength tester.It is the major equipment of the withstand voltage test in i.e. (CCC) authentication of national compulsory authentication.Withstands voltage tester accurately whether, the security of electric equipment is significant, therefore need a kind of withstands voltage tester calibrating installation of design.
Summary of the invention:
The purpose of this utility model is to provide a kind of withstands voltage tester calibrating installation, can address the above problem.
To achieve these goals, the technical solution of the utility model is: a kind of withstands voltage tester calibrating installation, comprise the input end relay module, the output terminal that it is characterized in that the input end relay module is connected with the input end of electronic load module, the output terminal of electronic load module is connected with the first input end of real effective modular converter, the output terminal of input end relay module also is connected with the input end of electric resistance partial pressure module, the output terminal of electric resistance partial pressure module is connected with second input end of real effective modular converter, the output terminal of real effective is connected with the input end of AD modular converter, the output terminal of AD modular converter is connected with the first input end of ARM control chip, first output terminal of ARM control chip is connected with the feedback end of electronic load module, this withstands voltage tester calibrating installation also comprises high pressure residence time detection module, the input end of this high pressure residence time detection module is connected with the output terminal of input end relay module, the output terminal of high pressure residence time detection module is connected with second input end of ARM control chip, second output terminal of ARM control chip is connected with the control end of input end relay module, and the 3rd output terminal of ARM control chip is connected with touch-screen.The 4th output terminal of ARM control chip is connected with outer computer.First output terminal of ARM control chip is connected with the feedback end of electronic load module by the Con_AC module.
The AC signal of current input terminal input converts the current DC signal to through the real effective modular converter after regulating electric current through the electronic load module, and voltage signal then directly converts the voltage direct current signal to through real effective after dividing potential drop.Current DC signal and voltage direct current signal convert digital signal to through the AD modular converter, enter the ARM control chip, and control chip feeds back to electronic load to regulate the size that punctures the alarm current input with the current value of setting.High pressure residence time detection module can be with the time measurement error control of entire circuit in the ms level.Treated signal is delivered to touch-screen to control chip and computing machine shows.Touch-screen and computing machine are provided with corresponding numerical key, function key, reset key, communication key and other buttons.The ARM control chip can the control input end relay module switch, thereby switches to different measurement patterns.The ARM control chip will be delivered to screen displaying through measurement result.Advantage of the present utility model is to realize the automatic measurement of withstands voltage tester, increases work efficiency, and reduces the working time.This calibrating installation has substituted many complete equipments and the instrument in the conventional calibration work, is convenient for carrying, and helps online detection.
Description of drawings:
Fig. 1 is a fundamental diagram of the present utility model
Fig. 2 is for measuring the theory diagram of electric current
Fig. 3 is the theory diagram of measuring voltage
Fig. 4 is the circuit diagram of high pressure residence time detection module
Fig. 5 is the circuit diagram of electric resistance partial pressure module
Fig. 6 is the circuit diagram of electronic load circuit
Fig. 7 is the circuit diagram of AD modular converter
Fig. 8 is the circuit diagram of real effective modular converter
Fig. 9 is the Con_AC module circuit diagram
Embodiment:
The utility model will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, a kind of withstands voltage tester calibrating installation 1, comprise input end relay module 2, the input end of this input end relay module 2 is connected with withstands voltage tester output terminal 3, first output terminal that it is characterized in that input end relay module 2 is connected with the input end of electronic load module 4, the output terminal of electronic load module 4 is connected with the first input end of real effective modular converter 7, second output terminal of input end relay module 2 also is connected with the input end of electric resistance partial pressure module 5, the output terminal of electric resistance partial pressure module 5 is connected with second input end of real effective modular converter 7, the output terminal 7 of real effective is connected with the input end of AD modular converter 8, the output terminal of AD modular converter 8 is connected with the first input end of ARM control chip 9, first output terminal of ARM control chip 9 is connected with the feedback end of electronic load module 4, this withstands voltage tester calibrating installation also comprises high pressure residence time detection module 6, the input end of this high pressure residence time detection module 6 is connected with the 3rd output terminal of input end relay module 2, the output terminal of high pressure residence time detection module 2 is connected with second input end of ARM control chip 9, second output terminal of ARM control chip 9 is connected with the control end of input end relay module 2, and the 3rd output terminal of ARM control chip 9 is connected with touch-screen 10.The 4th output terminal of ARM control chip 9 is connected with outer computer 11.First output terminal of ARM control chip is connected with the feedback end of electronic load module by the Con_AC module.
As shown in Figure 2, after the alternating current input, at first enter electronic load. in order to realize little current electrons load (as shown in Figure 6) under the high voltage, at first by transformer T101 step-down.After the step-down, by rectifier bridge (D201～D204) with the alternating current rectification.Then divide two-way, the R222 of leading up to keeps the lower limit by electric current, and another road is then by field effect transistor Q207.The dutycycle of the signal CON_AC control field effect transistor Q207 of first output terminal of ARM control chip output is recently regulated size of current by field effect transistor Q207 by regulating duty.Then realize control to the entire circuit electric current.This two-way electric current obtains sampled voltage by earth terminal through the R215 sampling resistor, by the SAMPLE_AC end, delivers to the real effective modular converter.As shown in Figure 8, real effective conversion chip AD536 is converted to alternating current the real effective DC current TRUE AC of equivalence, and deliver to the AD modular converter, after AD conversion chip AD7705 is converted to digital quantity with analog quantity, by A7705DOUT input ARM control chip, the model of this control chip is LPC2214.After control chip obtains digital quantity signal, compare with presupposed information, and realize the negative feedback of dutycycle among the field effect transistor Q207 in electronic load module control by CON AC, and then accurately control realizes the function of electronic load by the size of current of entire circuit.While outputs to touch-screen by the ARM control chip or computing machine shows.
As shown in Figure 3, after the alternating voltage input, behind the divider resistance and sampling resistor dividing potential drop by the divider resistance module, obtain sampled voltage by sampling resistor, obtain very effectively DC voltage by very effective modular converter, convert digital signal to by the AD modular converter then, input ARM control chip outputs to touch-screen or computing machine shows by the ARM control chip.
Fig. 4 is the equivalent circuit diagram of high pressure residence time detection module.Voltage input end V
0Be connected with the end of divider resistance R1, the other end of divider resistance R1 is connected with the end of sampling resistor R2, the other end ground connection of sampling resistor R2, the two ends of sampling resistor R2 are connected with the input end of rectification circuit 41, the output terminal of rectification circuit 41 is connected with the two ends of capacitor C 4, the positive voltage output end of rectification circuit 41 is connected with an input end of optocoupler 42 by resistance R 3, the negative voltage output terminal of rectification circuit 41 is connected with another input end of optocoupler 42, the output terminal of optocoupler 42 is connected with triggering timing circuit 43, the output terminal of triggering timing circuit 43 is connected with ARM control chip 9, and the input end of optocoupler also is parallel with a stabilivolt LM385.During the alternating voltage input, after divider resistance R1 and sampling resistor R2 dividing potential drop, the voltage of control sampling resistor R2 is within 30V, by choose reasonable capacitor C 4, the duration of charging of electric capacity can be controlled in the 1ms, thereby the error control that will cause the time of discharging and recharging is within 2ms.The existence of stabilivolt LM385 can make at input voltage V
0During less than 5000V, can guarantee the optocoupler nonoverload.Because the make-and-break time of optocoupler is in 10 μ s, the time measurement error of entire circuit can be controlled at the ms level.According to JJG795-2004 " withstands voltage tester vertification regulation ", the requirement of voltage duration detection module maximum tolerance 1% can solve most high pressure residence times and detect the particularly resident detection of short time high pressure of 2s～5s.
Fig. 6 is the circuit diagram of electronic load module.This electronic load module comprises transformer T101, the input end of transformer T101 is connected with voltage input end INPUT AC, another input end of transformer T101 is by sampling resistor R215 ground connection, the output terminal of transformer T101 is connected with rectification circuit, the positive output end of rectification circuit is connected with an end of first resistance R 221, the negative output terminal of this rectification circuit is connected with an end of second resistance R 223, the negative output terminal ground connection of rectification circuit, the other end of first resistance R 221 is connected with the leakage level of field effect transistor Q207, the other end of second resistance R 223 is connected with the source class of field effect transistor Q207, the leakage level of field effect transistor Q207 is connected with an end of the 3rd resistance R 222, the source class of field effect transistor Q207 is connected with the other end of the 3rd resistance R 222, and the grid of field effect transistor Q207 is connected with the feedback end CON_AC of electronic load module.
Fig. 5, Fig. 7, Fig. 8 and Fig. 9 are prior art, do not repeat them here.
Claims (4)
1. withstands voltage tester calibrating installation, comprise the input end relay module, the input end of this input end relay module is connected with the output terminal of withstands voltage tester, the output terminal that it is characterized in that the input end relay module is connected with the input end of electronic load module, the output terminal of electronic load module is connected with the first input end of real effective modular converter, the output terminal of input end relay module also is connected with the input end of electric resistance partial pressure module, the output terminal of electric resistance partial pressure module is connected with second input end of real effective modular converter, the output terminal of real effective is connected with the input end of AD modular converter, the output terminal of AD modular converter is connected with the first input end of ARM control chip, first output terminal of ARM control chip is connected with the feedback end of electronic load module, this withstands voltage tester calibrating installation also comprises high pressure residence time detection module, the input end of this high pressure residence time detection module is connected with the output terminal of input end relay module, the output terminal of high pressure residence time detection module is connected with second input end of ARM control chip, second output terminal of ARM control chip is connected with the control end of input end relay module, and the 3rd output terminal of ARM control chip is connected with touch-screen.
2. a kind of withstands voltage tester calibrating installation that requires as claim 1 is characterized in that second output terminal of ARM control chip is connected with outer computer.
3. a kind of withstands voltage tester calibrating installation that requires as claim 1, it is characterized in that voltage input end is connected with an end of divider resistance, the other end of divider resistance is connected with an end of sampling resistor, the other end ground connection of sampling resistor, the two ends of sampling resistor are connected with the input end of rectification circuit, the output terminal of rectification circuit is connected with the two ends of electric capacity, the positive voltage output end of rectification circuit is connected with an input end of optocoupler by resistance, the negative voltage output terminal of rectification circuit is connected with another input end of optocoupler, the output terminal of optocoupler is connected with the triggering timing circuit, the output terminal of triggering timing circuit is connected with the ARM control chip, and the input end of optocoupler also is parallel with a stabilivolt.
4. a kind of withstands voltage tester calibrating installation that requires as claim 1, it is characterized in that this electronic load module comprises transformer, an input end of transformer is connected with voltage input end, another input end of transformer is by sampling resistor ground connection, the output terminal of transformer is connected with rectification circuit, the positive output end of rectification circuit is connected with an end of first resistance, the negative output terminal of this rectification circuit is connected with an end of second resistance, the negative output terminal ground connection of rectification circuit, the other end of first resistance is connected with the leakage level of field effect transistor, the other end of second resistance is connected with the source class of field effect transistor, the leakage level of field effect transistor is connected with an end of the 3rd resistance, the source class of field effect transistor is connected with the other end of the 3rd resistance, and the grid of field effect transistor is connected with the feedback end of electronic load module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200731482U CN201489102U (en) | 2009-05-31 | 2009-05-31 | Voltage-withstand test instrument correcting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200731482U CN201489102U (en) | 2009-05-31 | 2009-05-31 | Voltage-withstand test instrument correcting device |
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| CN201489102U true CN201489102U (en) | 2010-05-26 |
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| CN2009200731482U Expired - Fee Related CN201489102U (en) | 2009-05-31 | 2009-05-31 | Voltage-withstand test instrument correcting device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185852A (en) * | 2011-12-31 | 2013-07-03 | 珠海格力电器股份有限公司 | Testing method and testing device and testing system for high-voltage discharge component |
| CN104237842A (en) * | 2014-10-10 | 2014-12-24 | 国家电网公司 | Alternating voltage test verification device for verifying automatic single-phase kilowatt-hour meter production line |
| CN109085484A (en) * | 2018-10-24 | 2018-12-25 | 广州赛宝计量检测中心服务有限公司 | A kind of measurement method and circuit of the voltage hold-time of proof voltage tester |
| CN109581261A (en) * | 2018-12-06 | 2019-04-05 | 河南省计量科学研究院 | Earth-continuity tester calibration system |
| CN110031787A (en) * | 2019-05-14 | 2019-07-19 | 苏州恒德检测科技有限公司 | A kind of calibration method of proof voltage tester |
| CN110108863A (en) * | 2019-05-23 | 2019-08-09 | 杭州衡正检测技术有限公司 | A kind of portable calibrating installation applied to paper and cardboard detecting instrument |
| CN110398706A (en) * | 2019-08-21 | 2019-11-01 | 广州赛宝计量检测中心服务有限公司 | A kind of calibration system and its calibration method of proof voltage tester breakdown alarm preset current |
-
2009
- 2009-05-31 CN CN2009200731482U patent/CN201489102U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103185852A (en) * | 2011-12-31 | 2013-07-03 | 珠海格力电器股份有限公司 | Testing method and testing device and testing system for high-voltage discharge component |
| CN103185852B (en) * | 2011-12-31 | 2015-05-20 | 珠海格力电器股份有限公司 | Testing method and testing device and testing system for high-voltage discharge component |
| CN104237842A (en) * | 2014-10-10 | 2014-12-24 | 国家电网公司 | Alternating voltage test verification device for verifying automatic single-phase kilowatt-hour meter production line |
| CN109085484A (en) * | 2018-10-24 | 2018-12-25 | 广州赛宝计量检测中心服务有限公司 | A kind of measurement method and circuit of the voltage hold-time of proof voltage tester |
| CN109085484B (en) * | 2018-10-24 | 2023-11-10 | 广州赛宝计量检测中心服务有限公司 | Method and circuit for measuring voltage holding time of voltage endurance tester |
| CN109581261A (en) * | 2018-12-06 | 2019-04-05 | 河南省计量科学研究院 | Earth-continuity tester calibration system |
| CN109581261B (en) * | 2018-12-06 | 2024-03-15 | 河南省计量测试科学研究院 | Calibrating system for grounding on-resistance tester |
| CN110031787A (en) * | 2019-05-14 | 2019-07-19 | 苏州恒德检测科技有限公司 | A kind of calibration method of proof voltage tester |
| CN110108863A (en) * | 2019-05-23 | 2019-08-09 | 杭州衡正检测技术有限公司 | A kind of portable calibrating installation applied to paper and cardboard detecting instrument |
| CN110398706A (en) * | 2019-08-21 | 2019-11-01 | 广州赛宝计量检测中心服务有限公司 | A kind of calibration system and its calibration method of proof voltage tester breakdown alarm preset current |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20150531 |
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| EXPY | Termination of patent right or utility model |