CN203337810U - Calibrating apparatus for lightning protection element testing instrument - Google Patents
Calibrating apparatus for lightning protection element testing instrument Download PDFInfo
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- CN203337810U CN203337810U CN2013203824911U CN201320382491U CN203337810U CN 203337810 U CN203337810 U CN 203337810U CN 2013203824911 U CN2013203824911 U CN 2013203824911U CN 201320382491 U CN201320382491 U CN 201320382491U CN 203337810 U CN203337810 U CN 203337810U
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Abstract
The utility model discloses a calibrating apparatus for a lightning protection element testing instrument. A high-voltage terminal of a sampling holding high-voltage voltmeter is connected with a positive testing hole and a low-voltage terminal is connected with an input terminal of a microampere meter; and the output terminal of the microampere meter is connected with a negative testing hole. One end of a timing igniter is connected with the high-voltage terminal of the sampling holding high-voltage voltmeter; the other end of the timing igniter is connected with the low-voltage terminal of the sampling holding high-voltage voltmeter; and a sampling locking signal output terminal of the timing igniter is connected with a locking switch control terminal of the sampling holding high-voltage voltmeter. One end of a simulated linear resistance plate is connected with the high-voltage terminal of the sampling holding high-voltage voltmeter; and the other end of the simulated linear resistance plate is connected with the low-voltage terminal of the sampling holding high-voltage voltmeter. And a resistance selection modul is connected with a resistance selection switch control terminal in the simulated linear resistance plate. Because of the simulated linear resistance plate, five stable analog voltages are obtained; and a requirement of starting motion voltage calibration in a range of 0 to 2000 V can be met.
Description
Technical field
The utility model relates to metering appliance detecting device technique field, is specifically related to a kind of lightning protection component tester verification device.
Technical background
The lightning protection component tester is that the overvoltage protection that is widely used in the fields such as post and telecommunications, railway signal, radio and television, computing machine, household electrical appliance and instrument detects for measuring a kind of instrument of the overvoltage protective element DC parameters such as Zinc-Oxide Arrester (voltage dependent resistor (VDR)), metallic ceramics discharge tube, the lightning-arrest rod of vacuum.
According to JJF(osmanthus) 18-2009 " lightning protection component tester calibrating standard ", lightning protection component tester test condition is: under the test condition that is 1) 1mA ± 5 μ A at electric current, measure the origination action voltage U of voltage dependent resistor (VDR)
1mA; 2) at U
1mAchange 0.75U into
1mAthe time, measure leakage current I0.75U
1mA; 3) at voltage build-up rate, be under (100 ± 8) V/s condition, the measurement point ignition voltage.
Can see, the calibrating of lightning protection component tester needs electric current and voltage detecting under accuracy requirement separately, and the synchronous characteristics that detect of parameter group are arranged.The calibrating of lightning protection component tester now has the problem of two broad aspect:
One, because stability, the repeatability of voltage dependent resistor (VDR) equivalence conducting resistance in kind are poor, obtain stable, consistent origination action voltage with voltage dependent resistor (VDR) test product in kind very difficult.
Two, have the checkout equipment that mostly uses separation for the equipment of calibrating or calibration lightning protection component tester now, such as DC digital voltmeter, reometer, volt box and resistance box etc.With separation equipment, the lightning protection component tester is detected following problem is arranged:
1. the separate apparatus range is improper: because general digital electronic ammeter measurement range is excessive, and sensed current is very little, detects small-range by the wide range instrument can bring very large measuring error, can not meet the needs of detection.
2. separate apparatus detects and need to use a plurality of equipment, wiring complexity, operation inconvenience.
3. the lightning protection component tester is examined and determine needed separation correcting device and is added together expensively, and a lot of districts and cities First Astronautic Research Institute for Measurement and Test does not have condition to buy, so the calibration operation of lightning protection component tester can't be carried out.
Above reason causes a lot of First Astronautic Research Institute for Measurement and Test can not effectively judge the metering performance of lightning protection component tester, can indirectly cause the user can't screen problematic overvoltage protecting device, brings potential safety hazard to engineering, facility, device, causes the person and property loss.
The utility model content
The purpose of this utility model is for above-mentioned technical matters, and the lightning protection component tester verification device that a kind of low cost, performance are applicable, integrated level is high is provided.
For realizing this purpose, the lightning protection component tester verification device that the utility model is designed, it is characterized in that: it comprises that sampling keeps high-tension voltmeter, micro aning ammeter, the timing point firearm, the start by set date switch, analog linearity resistance dish and resistance selection module, wherein, described sampling keeps the high-pressure side of high-tension voltmeter to connect anodal instrument connection, sampling keeps the low pressure end of high-tension voltmeter to connect the input end of micro aning ammeter, the output terminal of micro aning ammeter connects the negative pole instrument connection, one end of described timing point firearm connects the high-pressure side that sampling keeps high-tension voltmeter, the other end of timing point firearm connects the low pressure end that sampling keeps high-tension voltmeter, what the sampling latch signal output part of timing point firearm connected that sampling keeps high-tension voltmeter latchs the switch control end, one end of described analog linearity resistance dish connects the high-pressure side that sampling keeps high-tension voltmeter, the other end of analog linearity resistance dish connects the low pressure end that sampling keeps high-tension voltmeter, resistance selection switch control end in described resistance selection module connecting analog linear resistance dish.
Described analog linearity resistance dish comprises resistance R 1 ~ resistance R 5 and switch module, described resistance R 1 ~ resistance R 5 is connected in parallel between the high-pressure side and low pressure end of described sampling maintenance high-tension voltmeter by switch module, in described resistance R 1 ~ resistance R 5, each resistance is connected with the K switch 1～K switch 5 in described switch module respectively, the switch controlling signal input end of described resistance selection module connecting valve module.
Described timing point firearm comprises the start by set date switch, timer, rest-set flip-flop, ignition switch K7 and discharge tube simulation internal resistance R8, wherein, the end of ignition switch K7 connects the high-pressure side that sampling keeps high-tension voltmeter, the other end of ignition switch K7 is simulated internal resistance R8 by discharge tube and is connected the low pressure end that sampling keeps high-tension voltmeter, the signal output part of described timer connects the control signal input end of igniting K switch 7, the signal input part of described timer connects the start by set date switch, the input end of described rest-set flip-flop connects the other end of igniting K switch 7, what the output terminal of rest-set flip-flop connected that sampling keeps high-tension voltmeter latchs the switch control end.
Described sampling keeps high-tension voltmeter to comprise divider resistance R6, divider resistance R7, the first operational amplifier N1, sampling keeps capacitor C 1, latch K switch 6, the second operational amplifier N2 and voltage transitions display module N3, wherein, the end of divider resistance R6 is the high-pressure side of sampling maintenance high-tension voltmeter, the other end of divider resistance R6 connects the end of divider resistance R7, the other end of divider resistance R7 is the low pressure end of sampling maintenance high-tension voltmeter, the in-phase input end of described the first operational amplifier N1 connects the end of divider resistance R7, the output terminal of the first operational amplifier N1 connects the in-phase input end of the second operational amplifier N2 by latching K switch 6, the inverting input of the first operational amplifier N1 is connected with the inverting input of the second operational amplifier N2 and the output terminal of the second operational amplifier N2, the in-phase input end of the second operational amplifier N2 keeps capacitor C 1 to connect the low pressure end that sampling keeps high-tension voltmeter by sampling, the output terminal of the second operational amplifier N2 connects the signal input part of voltage transitions display module N3, the reference voltage end COM1 of voltage transitions display module N3 connects the low pressure end that sampling keeps high-tension voltmeter.
The beneficial effects of the utility model are:
1. the utility model replaces voltage dependent resistor (VDR) in kind by analog linearity resistance dish, obtains five stable analog voltages, meets the requirement of the calibration origination action voltage in the 0-2000V scope.
2. the utility model has realized that with low-cost the sampling that meets the collimation technique index keeps the integrated of high-tension voltmeter, micro aning ammeter and timer, realize the function of the simultaneous display voltage and current value of parameter group alignment requirements, met the demand of lightning protection component tester calibrating.
The accompanying drawing explanation
Fig. 1 is the utility model structured flowchart;
The structured flowchart that Fig. 2 is analog linearity resistance disc portion in the utility model;
The structured flowchart that Fig. 3 is timing point firearm part in the utility model;
Fig. 4 is the structured flowchart that in the utility model, sampling keeps the high tension voltage matrix section.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Lightning protection component tester verification device as shown in Fig. 1 ~ 4, it comprises that sampling keeps high-tension voltmeter, micro aning ammeter, the timing point firearm, the start by set date switch, analog linearity resistance dish and resistance selection module, wherein, described sampling keeps the high-pressure side of high-tension voltmeter to connect anodal instrument connection, sampling keeps the low pressure end of high-tension voltmeter to connect the input end of micro aning ammeter, the output terminal of micro aning ammeter connects the negative pole instrument connection, one end of described timing point firearm connects the high-pressure side that sampling keeps high-tension voltmeter, the other end of timing point firearm connects the low pressure end that sampling keeps high-tension voltmeter, what the sampling latch signal output part of timing point firearm connected that sampling keeps high-tension voltmeter latchs the switch control end, one end of described analog linearity resistance dish connects the high-pressure side that sampling keeps high-tension voltmeter, the other end of analog linearity resistance dish connects the low pressure end that sampling keeps high-tension voltmeter, resistance selection switch control end in described resistance selection module connecting analog linear resistance dish.
In technique scheme, described analog linearity resistance dish comprises resistance R 1 ~ resistance R 5 and switch module, described resistance R 1 ~ resistance R 5 is connected in parallel between the high-pressure side and low pressure end of described sampling maintenance high-tension voltmeter by switch module, in described resistance R 1 ~ resistance R 5, each resistance is connected with the K switch 1～K switch 5 in described switch module respectively, the switch controlling signal input end of described resistance selection module connecting valve module.In technique scheme, resistance R 1 is 100k, and resistance R 2 is 500k, and resistance R 3 is 1000k, and resistance is that R4 is 1650k, and resistance R 5 is 1950k.
In technique scheme, described timing point firearm comprises the start by set date switch, timer, rest-set flip-flop, ignition switch K7 and discharge tube simulation internal resistance R8, wherein, the end of ignition switch K7 connects the high-pressure side that sampling keeps high-tension voltmeter, the other end of ignition switch K7 is simulated internal resistance R8 by discharge tube and is connected the low pressure end that sampling keeps high-tension voltmeter, the signal output part of described timer connects the control signal input end of igniting K switch 7, the signal input part of described timer connects the start by set date switch, the input end of described rest-set flip-flop connects the other end of igniting K switch 7, what the output terminal of rest-set flip-flop connected that sampling keeps high-tension voltmeter latchs the switch control end.Timer circuit is typical 555 timing circuits, and selecting precision resistance and polypropylene capactive to make timing is 10s ± 0.2s, and accuracy meets the requirement of lightning protection component tester climbing speed for (100 ± 10) V/s.Start by set date switch triggering timer starts timing, and after timing finishes, timer produces ignition signal, controls igniting K switch 7 at once closed.R8 is for the simulation discharge tube punctures internal resistance in discharge tube simulation internal resistance, plays metering function simultaneously.Initial firing current produces a pulse signal on discharge tube simulation internal resistance R8, as the input of rest-set flip-flop.Rest-set flip-flop is typical circuit, and the rear acquiescence that powers on is output as low level.After pulse high level inputs to rest-set flip-flop, making the RS output switching activity is high level.This high level is latch signal E, and this latch signal E controls sampling and keeps K switch 6 high pressure of light a fire that latchs of high-tension voltmeter to be latched on sampling maintenance capacitor C 1.
In technique scheme, described sampling keeps high-tension voltmeter to comprise divider resistance R6, divider resistance R7, the first operational amplifier N1, sampling keeps capacitor C 1, latch K switch 6, the second operational amplifier N2 and voltage transitions display module N3, wherein, the end of divider resistance R6 is the high-pressure side of sampling maintenance high-tension voltmeter, the other end of divider resistance R6 connects the end of divider resistance R7, the other end of divider resistance R7 is the low pressure end of sampling maintenance high-tension voltmeter, the in-phase input end of described the first operational amplifier N1 connects the end of divider resistance R7, the output terminal of the first operational amplifier N1 connects the in-phase input end of the second operational amplifier N2 by latching K switch 6, the inverting input of the first operational amplifier N1 is connected with the inverting input of the second operational amplifier N2 and the output terminal of the second operational amplifier N2, the in-phase input end of the second operational amplifier N2 keeps capacitor C 1 to connect the low pressure end that sampling keeps high-tension voltmeter by sampling, the output terminal of the second operational amplifier N2 connects the signal input part of voltage transitions display module N3, the reference voltage end COM1 of voltage transitions display module N3 connects the low pressure end that sampling keeps high-tension voltmeter.Because lightning protection component tester to be measured is 0.5% to the accuracy requirement of 1mA constant current.For guaranteeing the accuracy of calibrating origination action voltage, the error that calibrating installation is introduced should be less than 0.1%, i.e. electric current change amount should≤1 μ A.While measuring origination action voltage, the high pressure divider resistance of this device can cause shunting.Therefore, using divider resistance R6 is 2000M Ω, and the resitstance voltage divider that divider resistance R7 is 1M Ω is sampled, and can guarantee in test preset voltage, origination action voltage U
1mAand 0.75U
1mAthe time, the current error of introducing≤1 μ A, meet the calibrating requirement.While measuring above voltage, latch K switch 6 and keep conducting, operational amplifier N1 and operational amplifier N2 form the negative feedback voltage follower, the output of the output of operational amplifier N1 and operational amplifier N2 all equals high-pressure sampling voltage, and the Voltage-output of operational amplifier N2 is connected to the voltage input end of voltage transitions display module N3.
In addition, consider the requirement of lightning protection component tester voltage indicating value range, accuracy and resolution, this device adopts good ICL7129 41/2 double integrator voltage transitions display module N3 to carry out the processing of voltage and by LCD(Liquid Crystal Display, liquid crystal display) display shows, guaranteed that voltage range is 1999.9V, accuracy is 0.2%, has met the requirement of lightning protection component tester voltage measurement calibration.
During the utility model work, the high-voltage output end of lightning protection component tester connects anodal instrument connection, the input end of lightning protection component tester connects the negative pole instrument connection, the measuring current of 1mA flows into anodal instrument connection from the high-voltage output end of tested lightning protection component tester, flow through after selected high-voltage switch gear and resistance, from sampling, keep the low pressure end of high-tension voltmeter to flow out.Because the relative linear resistance of high-voltage switch gear conducting resistance can be ignored, this electric current produces a stable simulation origination action voltage U on chosen linear resistance
1mA=1mA * R.By 5 five resistance of resistance R 1 ~ resistance R, can produce five analog voltages such as 100V, 500V, 1000V, 1650V, 1950V respectively, meet the requirement of calibrating origination action voltage in 0 ~ 2000V scope.
This device not only has preset voltage, U
1mA, 0.75U
1mAthe voltage measurement function, also have the discharge tube DC breakdown voltage (ignition voltage) of measurement V
sdcfunction.Discharge tube DC breakdown voltage V
sdcmeasurement by the timing point firearm, triggered.When discharge tube is breakdown, the timing point firearm responds fast and produces a latch signal and makes to latch K switch 6 and at once disconnect, prefiring voltage sampling signal is latched in to sampling to be kept on capacitor C 1, operational amplifier N2 is output as the voltage latched on sampling maintenance capacitor C 1, the i.e. dividing potential drop of ignition voltage.This voltage is presented on LCD after changing by voltage transitions display module N3.
The content that this instructions is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (4)
1. a lightning protection component tester verification device, it is characterized in that: it comprises that sampling keeps high-tension voltmeter, micro aning ammeter, the timing point firearm, the start by set date switch, analog linearity resistance dish and resistance selection module, wherein, described sampling keeps the high-pressure side of high-tension voltmeter to connect anodal instrument connection, sampling keeps the low pressure end of high-tension voltmeter to connect the input end of micro aning ammeter, the output terminal of micro aning ammeter connects the negative pole instrument connection, one end of described timing point firearm connects the high-pressure side that sampling keeps high-tension voltmeter, the other end of timing point firearm connects the low pressure end that sampling keeps high-tension voltmeter, what the sampling latch signal output part of timing point firearm connected that sampling keeps high-tension voltmeter latchs the switch control end, one end of described analog linearity resistance dish connects the high-pressure side that sampling keeps high-tension voltmeter, the other end of analog linearity resistance dish connects the low pressure end that sampling keeps high-tension voltmeter, resistance selection switch control end in described resistance selection module connecting analog linear resistance dish.
2. lightning protection component tester verification device according to claim 1, it is characterized in that: described analog linearity resistance dish comprises resistance R 1 ~ resistance R 5 and switch module, described resistance R 1 ~ resistance R 5 is connected in parallel between the high-pressure side and low pressure end of described sampling maintenance high-tension voltmeter by switch module, in described resistance R 1 ~ resistance R 5, each resistance is connected with the K switch 1～K switch 5 in described switch module respectively, the switch controlling signal input end of described resistance selection module connecting valve module.
3. lightning protection component tester verification device according to claim 1, it is characterized in that: described timing point firearm comprises the start by set date switch, timer, rest-set flip-flop, ignition switch K7 and discharge tube simulation internal resistance R8, wherein, the end of ignition switch K7 connects the high-pressure side that sampling keeps high-tension voltmeter, the other end of ignition switch K7 is simulated internal resistance R8 by discharge tube and is connected the low pressure end that sampling keeps high-tension voltmeter, the signal output part of described timer connects the control signal input end of igniting K switch 7, the signal input part of described timer connects the start by set date switch, the input end of described rest-set flip-flop connects the other end of igniting K switch 7, what the output terminal of rest-set flip-flop connected that sampling keeps high-tension voltmeter latchs the switch control end.
4. lightning protection component tester verification device according to claim 1, it is characterized in that: described sampling keeps high-tension voltmeter to comprise divider resistance R6, divider resistance R7, the first operational amplifier N1, sampling keeps capacitor C 1, latch K switch 6, the second operational amplifier N2 and voltage transitions display module N3, wherein, the end of divider resistance R6 is the high-pressure side of sampling maintenance high-tension voltmeter, the other end of divider resistance R6 connects the end of divider resistance R7, the other end of divider resistance R7 is the low pressure end of sampling maintenance high-tension voltmeter, the in-phase input end of described the first operational amplifier N1 connects the end of divider resistance R7, the output terminal of the first operational amplifier N1 connects the in-phase input end of the second operational amplifier N2 by latching K switch 6, the inverting input of the first operational amplifier N1 is connected with the inverting input of the second operational amplifier N2 and the output terminal of the second operational amplifier N2, the in-phase input end of the second operational amplifier N2 keeps capacitor C 1 to connect the low pressure end that sampling keeps high-tension voltmeter by sampling, the output terminal of the second operational amplifier N2 connects the signal input part of voltage transitions display module N3, the reference voltage end COM1 of voltage transitions display module N3 connects the low pressure end that sampling keeps high-tension voltmeter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203824911U CN203337810U (en) | 2013-06-28 | 2013-06-28 | Calibrating apparatus for lightning protection element testing instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203824911U CN203337810U (en) | 2013-06-28 | 2013-06-28 | Calibrating apparatus for lightning protection element testing instrument |
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|---|---|
| CN203337810U true CN203337810U (en) | 2013-12-11 |
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| CN2013203824911U Expired - Fee Related CN203337810U (en) | 2013-06-28 | 2013-06-28 | Calibrating apparatus for lightning protection element testing instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022014A (en) * | 2015-07-29 | 2015-11-04 | 深圳市创荣发电子有限公司 | Point inspection tool of high pressure tester |
| CN113848523A (en) * | 2021-10-21 | 2021-12-28 | 山东省计量科学研究院 | Calibration method and calibration device for pulse type lightning protection element tester |
-
2013
- 2013-06-28 CN CN2013203824911U patent/CN203337810U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022014A (en) * | 2015-07-29 | 2015-11-04 | 深圳市创荣发电子有限公司 | Point inspection tool of high pressure tester |
| CN113848523A (en) * | 2021-10-21 | 2021-12-28 | 山东省计量科学研究院 | Calibration method and calibration device for pulse type lightning protection element tester |
| CN113848523B (en) * | 2021-10-21 | 2023-07-07 | 山东省计量科学研究院 | Calibration method and calibration device of pulse type lightning protection element tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20160628 |