CN110398706A - A kind of calibration system and its calibration method of proof voltage tester breakdown alarm preset current - Google Patents
A kind of calibration system and its calibration method of proof voltage tester breakdown alarm preset current Download PDFInfo
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- CN110398706A CN110398706A CN201910773813.7A CN201910773813A CN110398706A CN 110398706 A CN110398706 A CN 110398706A CN 201910773813 A CN201910773813 A CN 201910773813A CN 110398706 A CN110398706 A CN 110398706A
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- module
- proof voltage
- voltage tester
- voltage
- electronic loads
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The present invention relates to the collimation technique fields of proof voltage tester, disclose a kind of calibration system of proof voltage tester breakdown alarm preset current, it further include high-voltage rectifying module, microcontroller, signal isolation module and DC Electronic Loads module including proof voltage tester and standard amperemeters；The output end of the signal isolation module is connect with the DC Electronic Loads module, and the input terminal of the signal isolation module is connect with the microcontroller；Wherein, the signal isolation module, for carrying out electrical isolation to the microcontroller and the DC Electronic Loads module；The DC Electronic Loads module adjusts the equivalent resistance of the DC Electronic Loads module for being controlled by the microcontroller.By being configured the calibration, it can be achieved that proof voltage tester breakdown alarm preset current to DC Electronic Loads module, without manually adjusting the resistance value of adjustable resistor method or by the output voltage of school proof voltage tester, calibration efficiency with higher.
Description
Technical field
The present invention relates to the collimation technique field of proof voltage tester more particularly to a kind of breakdown alarms of proof voltage tester
The calibration system and its calibration method of preset current.
Background technique
The current range of proof voltage tester is generally divided into several gears such as 2mA, 20mA and 200mA.It is advised according to JJG795-2016
The requirement of journey, output voltage when proof voltage tester is calibrated cannot be below 0.5kV, and need in each current range
At least three calibration point is uniformly chosen in 20%~100% range；For having the tester of exchange and DC output voltage, hand over
Stream and dc breakdown alarm preset current should be calibrated respectively.Therefore, the calibration points of breakdown alarm preset current at least need
Want 18.If the breakdown alarm preset current of proof voltage tester is required using traditional calibration method in each breakdown
It alarms preset current calibration point, by the resistance value of manual fine-tuning adjustable resistor or by the output voltage of school proof voltage tester,
Increase leakage current slowly until alarm, whole process is cumbersome, workload is huge.
Summary of the invention
It is pre- in view of the deficiencies of the prior art, the present invention intends to provide a kind of proof voltage tester breakdown alarm
The calibration system for setting electric current automatically adjusts to its " equivalent resistance " by program-controlled DC electronic load blocks, makes to test back
Leakage current in road slowly increases, and realizes the calibration of proof voltage tester breakdown alarm preset current.
To achieve the above object, the present invention can be achieved by the following technical programs:
A kind of calibration system of proof voltage tester breakdown alarm preset current, including proof voltage tester and standard electric
Flow table further includes high-voltage rectifying module, microcontroller, signal isolation module and DC Electronic Loads module；
The proof voltage tester, the high-voltage rectifying module, the DC Electronic Loads module, the standard amperemeters
It is sequentially connected；
The output end of the signal isolation module is connect with the DC Electronic Loads module, the signal isolation module
Input terminal is connect with the microcontroller；
Wherein, the signal isolation module, for carrying out electricity to the microcontroller and the DC Electronic Loads module
Air bound from；
The DC Electronic Loads module adjusts the DC Electronic Loads module for being controlled by the microcontroller
Equivalent resistance.
More preferably, the present invention also provides the calibration method that a kind of proof voltage tester punctures alarm preset current, this method
The following steps are included:
The alarm current threshold value of proof voltage tester is arranged according to calibration point for the first step；
Second step starts the High voltage output of proof voltage tester；
Third step, after micro controller module detects the High voltage output of proof voltage tester, micro controller module is to direct current
The equivalent resistance of electronic load module is adjusted from big to small, passs the leakage current of proof voltage tester output loop slowly
Increase, DC Electronic Loads module, micro controller module are carried out electrical isolation by synchronous signal isolation module；
The leakage current of 4th step, proof voltage tester output loop is more than set threshold value, and proof voltage tester is cut
Disconnected High voltage output simultaneously issues alarm signal；
5th step, the maximum current value that standard amperemeters measures as puncture the calibration value of alarm current.
More preferably, the standard amperemeters has peak-value-holding function.
The present invention has the advantages that micro controller module is arranged automatically, without manually adjusting the resistance value of adjustable resistor method
Or by the output voltage of school proof voltage tester, calibration efficiency with higher.
Detailed description of the invention
Fig. 1 is one embodiment of the present of invention schematic diagram；
Fig. 2 is the specific schematic diagram of mesohigh DC/AC electronic load device of the embodiment of the present invention；
Fig. 3 is the embodiment of the present invention circuit diagram.
Appended drawing reference: 1, proof voltage tester；
2, high voltage ac/dc electronic load device；201, high-voltage rectifying module；202, DC Electronic Loads module；203, believe
Number isolation module；204, microcontroller；
3, standard amperemeters；
R1, feedback resistor；R2, current-limiting resistor；R3, the first voltage grading resistor；R4, the second voltage grading resistor；U1,
One amplifier；U2, the second amplifier；U3, converter；T1, IGBT power tube；.
Specific embodiment
Below in conjunction with attached drawing and specific embodiment, the present invention is further illustrated:
A kind of calibration system of the breakdown of proof voltage tester 1 alarm preset current, as shown in Figure 1, including that proof voltage is tested
Instrument 1 and standard amperemeters 3, further include high voltage ac/dc electronic load device 2, and high voltage ac/dc electronic load device 2, mark
Quasi- ammeter 3 is connected in the output loop of proof voltage tester 1.
High voltage ac/dc electronic load device 2 includes high-voltage rectifying module 201, microcontroller 204, signal isolation module
203 and DC Electronic Loads module 202.For meet high-voltage alternating calibrate needs, 1 output voltage of proof voltage tester need through
After excessively high repoussage flow module 201 is rectified, DC voltage is exported.
Proof voltage tester 1, high-voltage rectifying module 201, DC Electronic Loads module 202, standard amperemeters 3 successively connect
It connects.The output end of signal isolation module 203 is connect with DC Electronic Loads module 202, the input terminal of signal isolation module 203 with
Microcontroller 204 connects；In the present embodiment, for DC Electronic Loads module 202 using " floating ground " setting, therefore, it is necessary to use
Signal isolation module 203 is electrically being isolated by DC Electronic Loads module 202,204 module of microcontroller.
In embodiments of the present invention, signal isolation module 203 is used using ADuM130E chip, microcontroller 204
MSP430F2419 chip has peak-value-holding function in addition, standard amperemeters 3 uses Fluke 287C.
More preferably, in embodiments of the present invention, DC Electronic Loads module 202 includes the first voltage grading resistor R3, second
Voltage grading resistor R4, feedback resistor R1, current-limiting resistor R2, IGBT power tube T1, the first amplifier U1, the second amplifier U2
And converter U3.
Start proof voltage tester 1, the alternating current-direct current high voltage of output generates directly after high-voltage rectifying module 201 is rectified
Flow high pressure Vin；High pressure Vin is divided through the first voltage grading resistor R3 and the second voltage grading resistor R4, is obtained after dividing
Reference voltage signal of the voltage Vref as converter U3；Converter U3 selects 14 single channel serial line interface multiplication digital-to-analogue conversions
Device DAC8801 exports negative voltage signal after the second amplifier U2, exports positive voltage signal；Second amplifier U2 is exported just
Voltage signal is amplified by the first amplifier U1；First amplifier U1 output voltage signal is through current-limiting resistor R2, driving
IGBT power tube T1.
Module so is arranged automatically, without manually adjusting the resistance value of adjustable resistor method or by school proof voltage tester 1
Output voltage, can be realized proof voltage tester 1 breakdown alarm preset current automatic calibration, with previous calibrating mode phase
Than calibration efficiency with higher.
Specific embodiment: the alarm current threshold value of proof voltage tester 1 being arranged according to calibration point, and starts proof voltage survey
The High voltage output of instrument 1 is tried, high-voltage rectifying module 201 rectifies the High voltage output of proof voltage tester 1 and exports straight at this time
Galvanic electricity pressure, after 204 module of microcontroller detects the DC voltage that high-voltage rectifying module 201 exports, 204 module pair of microcontroller
The equivalent resistance of DC Electronic Loads module 202 is adjusted from big to small, makes the leakage electricity of 1 output loop of proof voltage tester
Stream slowly be incremented by, synchronous signal isolation module 203 to DC Electronic Loads module 202,204 module of microcontroller carry out electrically every
From；During calibration, when the leakage current of 1 output loop of proof voltage tester is more than set threshold value, proof voltage is surveyed
The output of 1 cutoff high of instrument is tried, and issues alarm signal.
The present invention also provides a kind of proof voltage tester 1 puncture alarm preset current calibration method, this method include with
Lower step:
The alarm current threshold value of proof voltage tester 1 is arranged according to calibration point for the first step；
Second step starts the High voltage output of proof voltage tester 1；
Third step, high-voltage rectifying module 201 export direct current after rectifying to the High voltage output of proof voltage tester 1
Pressure；
4th step, after 204 module of microcontroller detects the DC voltage that high-voltage rectifying module 201 exports, microcontroller
The equivalent resistance of DC Electronic Loads module 202 is adjusted in 204 modules from big to small, exports back proof voltage tester 1
The leakage current on road is slowly incremented by, and synchronous signal isolation module 203 is to DC Electronic Loads module 202,204 module of microcontroller
Carry out electrical isolation；
4th step, the leakage current of 1 output loop of proof voltage tester are more than set threshold value, proof voltage tester 1
Cutoff high output, and issue alarm signal；
5th step, the maximum current value that standard amperemeters 3 measures as puncture the calibration value of alarm current, standard electric
Flow table 3 has peak-value-holding function.For those skilled in the art, it can be done according to above technical scheme and design
Various other equivalent changes and deformation out, and all these change and modification all should belong to the claims in the present invention
Within protection scope.
Claims (3)
1. a kind of calibration system of proof voltage tester breakdown alarm preset current, including proof voltage tester and normalized current
Table, which is characterized in that further include high-voltage rectifying module, microcontroller, signal isolation module and DC Electronic Loads module；
The proof voltage tester, the high-voltage rectifying module, the DC Electronic Loads module, the standard amperemeters are successively
Connection；
The output end of the signal isolation module is connect with the DC Electronic Loads module, the input of the signal isolation module
The connection at end and the microcontroller；
Wherein, the signal isolation module, for the microcontroller and the DC Electronic Loads module carry out electrically every
From；
The DC Electronic Loads module, for being controlled by the microcontroller, adjust the DC Electronic Loads module etc.
Imitate resistance.
2. a kind of calibration method of proof voltage tester breakdown alarm preset current, method includes the following steps:
The alarm current threshold value of proof voltage tester is arranged according to calibration point for the first step；
Second step starts the High voltage output of proof voltage tester；
Third step, high-voltage rectifying module export DC voltage after rectifying to the High voltage output of proof voltage tester；
4th step, after micro controller module detects the DC voltage of high-voltage rectifying module output, micro controller module is to direct current
The equivalent resistance of electronic load module is adjusted from big to small, passs the leakage current of proof voltage tester output loop slowly
Increase, synchronous signal isolation module carries out electrical isolation to DC Electronic Loads module, micro controller module；
4th step, the leakage current of proof voltage tester output loop are more than set threshold value, and the cutting of proof voltage tester is high
Pressure exports and issues alarm signal；
5th step, the maximum current value that standard amperemeters measures as puncture the calibration value of alarm current.
3. a kind of calibration method of proof voltage tester breakdown alarm preset current according to claim 2, feature exist
In the standard amperemeters has peak-value-holding function.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910773813.7A CN110398706A (en) | 2019-08-21 | 2019-08-21 | A kind of calibration system and its calibration method of proof voltage tester breakdown alarm preset current |
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| CN201910773813.7A CN110398706A (en) | 2019-08-21 | 2019-08-21 | A kind of calibration system and its calibration method of proof voltage tester breakdown alarm preset current |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117949880A (en) * | 2024-03-21 | 2024-04-30 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Source meter direct-current micro-current indication four-quadrant calibration device and method |
Citations (6)
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| CN201489102U (en) * | 2009-05-31 | 2010-05-26 | 上海市质量监督检验技术研究院 | Voltage-withstand test instrument correcting device |
| CN102091424A (en) * | 2010-12-29 | 2011-06-15 | 广东省计量科学研究院东莞分院 | Calibrating device for AC and DC leakage current tester |
| CN102156501A (en) * | 2010-12-29 | 2011-08-17 | 广东省计量科学研究院东莞分院 | AC-DC (Alternating Current Direct Current) small-current electronic load simulator |
| CN204424027U (en) * | 2015-02-02 | 2015-06-24 | 王淑英 | A kind of adjustable high-power resistor box |
| CN205450238U (en) * | 2015-12-23 | 2016-08-10 | 苏州电器科学研究院股份有限公司 | Novel current load case that is used for withstand voltage appearance calibration |
| 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 |
-
2019
- 2019-08-21 CN CN201910773813.7A patent/CN110398706A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201489102U (en) * | 2009-05-31 | 2010-05-26 | 上海市质量监督检验技术研究院 | Voltage-withstand test instrument correcting device |
| CN102091424A (en) * | 2010-12-29 | 2011-06-15 | 广东省计量科学研究院东莞分院 | Calibrating device for AC and DC leakage current tester |
| CN102156501A (en) * | 2010-12-29 | 2011-08-17 | 广东省计量科学研究院东莞分院 | AC-DC (Alternating Current Direct Current) small-current electronic load simulator |
| CN204424027U (en) * | 2015-02-02 | 2015-06-24 | 王淑英 | A kind of adjustable high-power resistor box |
| CN205450238U (en) * | 2015-12-23 | 2016-08-10 | 苏州电器科学研究院股份有限公司 | Novel current load case that is used for withstand voltage appearance calibration |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117949880A (en) * | 2024-03-21 | 2024-04-30 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Source meter direct-current micro-current indication four-quadrant calibration device and method |
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