CN105067974A - Multi-position tool and leakage current detection alarm device thereof - Google Patents
Multi-position tool and leakage current detection alarm device thereof Download PDFInfo
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Abstract
The present invention discloses a multi-position tool and a leakage current detection alarm device thereof. The device comprises an amplifier module for amplifying the leakage current outputted by a leakage current detection loop to form a second amplification signal, a peak value sampling module for carrying out peak value sampling on the second amplification signal to form a peak value sampling signal, a first comparison module for comparing the peak value of the peak value sampling signal and the voltage value of a first reference signal to obtain a first comparison result signal, and a memory alarm module for continuously outputting an alarm signal according to the first comparison result signal and judging whether leakage current exceeds a factory-leave threshold value. The multi-position tool comprises at least one leakage current detection alarm device. According to the multi-position tool and the leakage current detection alarm device, the false alarming rate of leakage current alarm can be significantly reduced, and the efficiency of automation production is improved.
Description
Technical field
The present invention relates to intelligent instrument and manufacture field, particularly relate to a kind of multi-meter position tooling and leakage current test warning device thereof.
Background technology
Along with manufacturing fast development, the progressively rising of human cost, manufacturer is very urgent to factory automation, intelligentized demand, simultaneously, consumer it is also proposed higher requirement to the stability of various product and reliability, increasing product, in batch production process, needs to carry out the Performance Detection such as ac voltage withstanding.
At present, in actual production, in the production of especially intelligent instrument, more common way adopts traditional AC withstand voltage tester to coordinate single position tooling or multi-meter position tooling, treat testing product and carry out ac voltage withstanding detection, that is ac voltage withstanding leakage current test.
But on multi-meter position tooling, because traditional AC withstand voltage tester is sending after leakage current is reported to the police and can carry out self-protection, it is which product to be detected on multi-meter position tooling has been out of order that testing staff only generally cannot distinguish with naked eyes actually.In addition, if duplicate detection also likely causes the damage of product to be detected, or the electric leakage part that namely result in product to be detected in detecting first is smashed by leakage current.
For the problems referred to above, market also occurs to carry out the synchronous ac voltage withstanding checkout equipment detected to multiple product to be detected simultaneously, but still there is following defect: the rate of false alarm that leakage current is reported to the police is higher, volume is larger, the set-up time of product to be detected is longer, the labour intensity of testing staff is comparatively large and be not suitable for online assignment.
It can thus be appreciated that, be necessary to be improved existing ac voltage withstanding checkout equipment, to be satisfied with the market demand better.
Summary of the invention
The object of the present invention is to provide a kind of multi-meter position tooling and leakage current test warning device thereof, higher for solving the rate of false alarm that in prior art, leakage current is reported to the police, and the problem that automated production efficiency is lower.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of leakage current test warning device, comprising: amplification module, for amplifying the leakage current that leakage current test loop exports, to form the second amplifying signal; Peak value sampling module, for carrying out peak value sampling to this second amplifying signal, to form peak value sampling signal; First comparison module, for the magnitude of voltage of the peak value and the first reference signal that compare this peak value sampling signal, obtains the first compare result signal; And memory alarm module, for continuing output alarm signal according to this first compare result signal, to judge whether leakage current exceedes threshold value of dispatching from the factory by this alerting signal.
Further, described amplification module comprises: the first amplifying unit, for amplifying the described leakage current that leakage current test loop exports, obtains the first amplifying signal; And second amplifying unit, for amplifying this first amplifying signal, to form described second amplifying signal.
Further, described leakage current test warning device also comprises: the first supply module, for providing the first supply voltage to described first amplifying unit; And second supply module, for providing second source voltage to described second amplifying unit.
Further, described leakage current test warning device also comprises: the second comparison module, for the magnitude of voltage of more described second amplifying signal and the magnitude of voltage of the second reference signal, obtains the second compare result signal; And safe indicating module, for according to this second compare result signal output safety indicator signal, to judge that whether leakage current test loop is normal by this safe indicator signal.
Further, described leakage current test warning device also comprises: isolation module, for isolating the described leakage current that leakage current test loop exports, so that the leakage current after isolation is inputed to described amplification module.
Further, described leakage current test warning device also comprises: reseting module, for the described memory alarm module that resets, reports to the police, make leakage current test loop can carry out the leakage current test of next product to be detected to remove leakage current.
Further, described memory alarm module comprise in the first smooth alarm unit, acoustic alarm unit or switch alarm unit any one, report to the police if described alerting signal continues to drive one of those alarm units to send leakage current, then represent that current product to be detected is faulty item.
Further, described safe indicating module comprises the second smooth alarm unit, if described safe indicator signal drives this second smooth alarm unit to send passage of scintillation light according to default flicker frequency, then represents that leakage current test loop is normal.
A kind of multi-meter position tooling comprises at least one leakage current test warning device as above.
Compared with prior art, the present invention has following beneficial effect:
By arranging peak value sampling module and memory alarm module, as long as have a peak value more than the magnitude of voltage of the first reference signal in the peak value sampling signal making peak value sampling module be formed according to the leakage current that leakage current test loop exports, namely memory alarm module can send leakage current continuously and report to the police, thus ensure that reliable sensitivity, reduce the rate of false alarm that leakage current is reported to the police.
In addition, being reported to the police by leakage current can also linking automation production line, namely in the fields such as controls, safety utilization of electric power automatically for next action provides instruction, thus raising automated production efficiency.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the leakage current test warning device of an embodiment.
Fig. 2 is the structured flowchart of amplification module in Fig. 1.
Fig. 3 is the structured flowchart of the leakage current test warning device of another embodiment.
Fig. 4 is the structured flowchart of the leakage current test warning device of another embodiment.
Fig. 5 is the structured flowchart of the leakage current test warning device of another embodiment.
Fig. 6 is the structured flowchart of the leakage current test warning device of a specific embodiment.
Fig. 7 is the circuit theory diagrams of the leakage current test warning device of a specific embodiment.
Embodiment
The exemplary embodiment embodying feature & benefits of the present invention will describe in detail in the following description.Be understood that the present invention can have various changes on different embodiments, it neither departs from the scope of the present invention, and explanation wherein and to be shown in be use when explain in essence, and be not used to limit the present invention.
As previously mentioned, because manufacturer is very urgent to factory automation, intelligentized demand, simultaneously, consumer it is also proposed higher requirement to the stability of various product and reliability, increasing product is in batch production process, need to carry out the Performance Detection such as ac voltage withstanding, ac voltage withstanding checkout equipment is had a wide range of applications in fields such as instrument and meters, automatically control, safety utilization of electric power.
But existing ac voltage withstanding checkout equipment remains in following defect: the rate of false alarm that (1) leakage current is reported to the police is higher; (2) automated production efficiency is low.
Therefore, in order to reduce the rate of false alarm that leakage current is reported to the police, improve automated production efficiency simultaneously, spy proposes a kind of leakage current test warning device meeting online assignment requirement, the scene making it not be only applicable to various product to need to carry out faint ac leakage detection alarm in manufacturing process, is applicable to the scene that automatic control, safety utilization of electric power etc. need to carry out faint ac leakage detection alarm too.
Refer to Fig. 1, in one embodiment, a kind of leakage current test warning device 100 comprises: amplification module 110, peak value sampling module 120, first comparison module 130 and memory alarm module.
Wherein, the leakage current that amplification module 110 exports for amplifying leakage current test loop, to form the second amplifying signal.
Peak value sampling module 120 for carrying out peak value sampling to this second amplifying signal, to form peak value sampling signal.
So-called peak value sampling samples to set up waveform signal to the second amplifying signal with non-uniform time interval, and then between each sampling interval, find out maximal value and the minimum value of this waveform signal, and form peak value sampling signal by this maximal value and minimum value.That is, the waveform that peak value sampling signal presents can embody maximum voltage value and the minimum amount of voltage that of the second amplifying signal, can realize follow-up judgement of whether transfiniting to leakage current by the maximum voltage value of this second amplifying signal and minimum amount of voltage that.
First comparison module 130, for the magnitude of voltage of the peak value and the first reference signal that compare this peak value sampling signal, obtains the first compare result signal.
Peak value herein refers in particular to the maximum voltage value of the second amplifying signal, as long as this maximum voltage value has exceeded the magnitude of voltage of the first reference signal, and the conclusion that the first compare result signal obtained can be utilized to determine leakage current exceed threshold value of dispatching from the factory.That is, if maximum voltage value all has not exceeded the magnitude of voltage of the first reference signal, then need not continue to compare, can show that leakage current meets the conclusion of product export requirement.
In the present embodiment, by the magnitude of voltage of peak value and the first reference signal is compared, instead of all magnitudes of voltage of the second amplifying signal and the magnitude of voltage of the first reference signal are compared, be conducive to improving automated production efficiency, and then improve the production efficiency manufactured.
Remember alarm module 140 for continuing output alarm signal according to this first compare result signal, to judge whether leakage current exceedes threshold value of dispatching from the factory by this alerting signal.
By arranging peak value sampling module 120 and memory alarm module 140, as long as have a peak value more than the magnitude of voltage of the first reference signal in the peak value sampling signal making peak value sampling module 120 be formed according to the leakage current that leakage current test loop exports, namely memory alarm module 140 can send leakage current continuously and report to the police, thus ensure that reliable sensitivity, reduce the rate of false alarm that leakage current is reported to the police.
In addition, the all right linking automation production line of leakage current warning exported is continued by memory alarm module 140, namely in the fields such as automatically control, safety utilization of electric power for next action provides instruction, such as, this instruction can be the faulty item that automatic rejection leakage current transfinites, thus is conducive to improving automated production efficiency.
Refer to Fig. 2, in one embodiment, amplification module 110 comprises: the first amplifying unit 111 and the second amplifying unit 112.
Wherein, the leakage current that the first amplifying unit 111 exports for amplifying leakage current test loop, obtains the first amplifying signal.
Second amplifying unit 112 for amplifying this first amplifying signal, to form the second amplifying signal.
First amplifying unit 111, second amplifying unit 112 can be operational amplifier or instrument amplifier, the amplification of leakage current is realized by the adjustable device of those enlargement factors, not only make enlargement factor can up to more than 10000 times, and ensure that the precision of the second amplifying signal that amplification is formed can control within 1%, make this second amplifying signal have excellent noise inhibiting ability, be conducive to peak value sampling and compare with magnitude of voltage.
Refer to Fig. 3, in one embodiment, leakage current test warning device 100 also comprises: the first supply module 310 and the second supply module 320.
Wherein, the first supply module 310 is for providing the first supply voltage to the first amplifying unit.
Second supply module 320 is for providing second source voltage to the second amplifying unit.
By arranging the separate power supply of two-way, i.e. the first supply module 310, second supply module 320, to power to first, second amplifying unit, makes the stable output of the second amplifying signal formed through amplifying leakage current.
Certainly, in other embodiments, first amplifying unit and module before thereof all can be powered by the first supply module 310, second amplifying unit and module afterwards thereof, such as, first comparison module, the second comparison module etc., all can be powered by the second supply module 320, to ensure that each signal stabilization formed in whole leakage current test warning device 100 exports further.
Refer to Fig. 4, leakage current test warning device 100 also comprises: the second comparison module 410 and safe indicating module 420.
Wherein, the second comparison module 410, for the magnitude of voltage of the magnitude of voltage and the second reference signal that compare the second amplifying signal, obtains the second compare result signal.
Whether the leakage current no matter leakage current test loop exports meets product export requirement, second comparison module 410 is by setting one reasonably range intervals, even if the minimum value of this range intervals is not less than the magnitude of voltage of the second reference signal, to be judged by the magnitude of voltage of this range intervals to the second amplifying signal, thus obtain the second compare result signal.
It should be noted that, in the present embodiment, the input signal that the second comparison module 410 adopts is the second amplifying signal, instead of the peak value sampling signal through peak value sampling in the first comparison module.That is, whole magnitudes of voltage of the second amplifying signal for what compare in rational range intervals, and be not certain a few maximum voltage value of the second amplifying signal and the peak value of peak value sampling signal, with the False Rate by comparing reduction leakage current test loop exception comprehensively, and then improve the accuracy of leakage current warning.
To pass through this safe indicator signal, safe indicating module 420, for according to this second compare result signal output safety indicator signal, judges that whether leakage current test loop is normal.
In the present embodiment, be a pulse signal according to the safe indicator signal that the second compare result signal produces, its pulsed frequency is determined by a-c cycle.
When leakage current test loop is normal, leakage current is not 0, namely now the magnitude of voltage of the second amplifying signal higher than the magnitude of voltage of the second reference signal, the safe indicator signal now produced is pulse signal, as utilized this pulse signal driving LED, then LED continues flicker, and its flicker frequency is determined by the pulsed frequency of this pulse signal.Namely, in representing that leakage current test loop normally works by the lasting flicker of LED, testing staff especially can also be pointed out in Hi-pot test to take care.
When leakage current test loop open circuit, or, wherein partial test open lines, leakage current atomic weak be even 0, namely now the magnitude of voltage of the second amplifying signal is not higher than the magnitude of voltage of the second reference signal, and the safe indicator signal now produced is level signal, as utilized this level signal driving LED, then LED is not luminous, represents that leakage current test loop is abnormal with this.
Certainly, in other embodiments, also other logical circuits can be passed through, such as not gate, safe indicator signal is set to contrary logic, namely the safe indicator signal produced when leakage current test loop is normal is level signal, and consistent with described in above-described embodiment of its course of work, this is no longer going to repeat them.
Refer to Fig. 5, in one embodiment, leakage current test warning device 100 also comprises: isolation module 510, for isolating the leakage current that leakage current test loop exports, so that the leakage current after isolation is inputed to amplification module 110.
Wherein, isolation module 510 can be current transformer.Between leakage current test loop and amplification module, Secure isolation is carried out to the leakage current in leakage current test loop by isolation module 510, especially between interchange forceful electric power and light current, Secure isolation is carried out, not only can ensure the security of leakage current test warning device 100 in the ac voltage withstanding test of the alternating voltage relating to several kilovolts even higher, leakage current test warning device 100 can not be smashed by leakage current, and then testing product can be treated carry out fault reproduction, be conducive to the qualification rate improving product to be detected, also assures that the safety of testing staff simultaneously, be conducive to the labour intensity reducing testing staff.
As shown in Figure 5, in one embodiment, leakage current test warning device 100 also comprises: reseting module 520, for the memory alarm module that resets, reports to the police, make leakage current test loop can carry out the leakage current test of next product to be detected to remove leakage current.
Wherein, the reset function of reseting module 520 can be manual reset, also can be utilize travel switch to automatically reset, to realize the automatic control of production line.Namely so-called travel switch is utilize the collision of manufacturing machine moving component to make its contact action to realize to connect or disjunction control circuit.
Be understandable that, the peak value of the second amplifying signal be reduced to the first reference signal magnitude of voltage and following after, the alerting signal producing leakage current warning still keeps continuing to export by remembering alarm module, until reseting module 520 carries out manual reset to this memory alarm module or automatically resets, leakage current is reported to the police and just can be removed.
That is; memory alarm module has memory output function of reporting to the police; as long as the peak value of the second amplifying signal is once higher than the magnitude of voltage of the first reference signal; even if the peak value of the second amplifying signal recovers normal or surface recovery is normal in follow-up work process; memory alarm module still continues output alarm signal; thus ensure that the reliable sensitivity that leakage current is reported to the police, reduce the rate of false alarm that leakage current is reported to the police.
It is worth mentioning that, the peak surface of so-called second amplifying signal is recovered normally to refer in follow-up work process, likely cause the leaky site in leakage current test loop such as certain resistance or diode to be smashed because leakage current is excessive, cause the corresponding measurement circuit open circuit of certain section, the now corresponding reduction of leakage current, and then the peak value of the second amplifying signal is reduced, and show as the normal phenomenon of recovery, exported by the lasting warning of memory alarm module and faulty item caused in such cases then can be avoided not occurred by the phenomenon accurately rejected.
Refer to Fig. 6 to Fig. 7, Fig. 6 is the structured flowchart of the leakage current test warning device 600 of a specific embodiment, and Fig. 7 is the circuit theory diagrams of the leakage current test warning device 600 of a specific embodiment.
In the present embodiment, leakage current test loop output leakage current carries out Secure isolation to current transformer 610, respectively two-stage is carried out to the leakage current after isolate by instrument amplifier 620 and operational amplifier 630 and amplify formation second amplifying signal, and this second amplifying signal is divided into two-way to carry out follow-up leakage current test warning.Wherein, instrument amplifier 620 is powered by the first supply module 680, and operational amplifier 630 and subsequent conditioning circuit thereof are powered by the second supply module 690.
The first via: peak value sampling is carried out to this second amplifying signal by peak value sampling module 640, the peak value sampling signal obtained is inputed to comparer 650 and the first reference signal compares, obtain the first compare result signal and input to trigger 660, output alarm signal is continued according to this first compare result signal, until reseting module 6100 pairs of triggers 660 reset by trigger 660.
Trigger 660 comprise in the first smooth alarm unit 663, acoustic alarm unit 661 or switch alarm unit 662 any one.Wherein, the first smooth alarm unit 663 is made up of LED, and acoustic alarm unit 661 is made up of hummer, and switch alarm unit 662 is made up of controllable silicon or relay.
If have at least one peak value in peak value sampling signal higher than the magnitude of voltage of the first reference signal, one of lasting those alarm units of driving are sent leakage current and report to the police by alerting signal, represent that current product to be detected is faulty item, otherwise, represent that current product to be detected is the specification product that leakage current meets product export requirement.
Second tunnel: this second amplifying signal is input to comparer 670 and the second reference signal compares, obtains the second compare result signal and inputs to safe indicating module, by safe indicating module according to this second compare result signal output safety indicator signal.
Safe indicating module comprises the second smooth alarm unit 671.Wherein, the second smooth alarm unit 671 is made up of LED.
If the magnitude of voltage of the second amplifying signal is higher than the magnitude of voltage of the second reference signal, this second smooth alarm unit 671 of driving is sent passage of scintillation light according to default flicker frequency by safe indicator signal, represent that leakage current test loop is normal, otherwise, represent the partial test open lines in leakage current test loop open circuit or leakage current test loop.
Be understandable that, in the present embodiment, the devices such as operational amplifier, comparer, trigger, LED, hummer, controllable silicon, relay are all that market very easily gets, leakage current test warning device 600 is made not need additionally to increase single-chip microcomputer or programming Control chip, thus be conducive to the simple and convenient of circuit debugging, be highly suitable for the quick manufacturing of leakage current test warning device in enormous quantities, and then be conducive to reducing manufacturing cost.
From previous embodiment, leakage current test warning device also can be applied in multi-meter position tooling, synchronously to detect multiple product to be detected.Such as, 6 intelligent electric meters are installed in multi-meter position tooling, correspondingly, are all equipped with a leakage current test warning device for each intelligent electric meter, to realize the detection alarm of each intelligent electric meter being carried out to ac leakage.The alerting signal exported by each leakage current test warning device and safe indicator signal, there is fault in which product to be detected that the alerting signal not only making testing staff pass through to export through memory can identify on multi-meter position tooling easily, the function of the state reliability self-inspection to leakage current test loop can also be realized by safe indicator signal simultaneously, and then the erroneous judgement preventing product due to leakage current measure loop fault to be detected and cause.
As from the foregoing, in actual production process, especially field is manufactured at instrument and meter, with factory automation, intelligentizedly to develop rapidly, the demand that multi-meter position tooling on-line synchronous detects ac leakage is very urgent, apply low cost of the present invention and the faulty item that the leakage current test warning device being suitable for manufacturing fast not only can indicate testing staff or automation equipment to reject leakage current to transfinite, also possesses the function of leakage current test loop self-inspection simultaneously, prevent product due to leakage current measure loop fault to be detected and the erroneous judgement caused, and then reach the object of warning safe operation, make it at instrument and meter, automatic control, the fields such as safety utilization of electric power need to carry out to be with a wide range of applications in the scene of faint ac leakage detection alarm.
Foregoing; be only preferred embodiment of the present invention; not for limiting embodiment of the present invention; those of ordinary skill in the art are according to central scope of the present invention and spirit; can carry out corresponding flexible or amendment very easily, therefore protection scope of the present invention should be as the criterion with the protection domain required by claims.
Claims (9)
1. a leakage current test warning device, is characterized in that, comprising:
Amplification module, for amplifying the leakage current that leakage current test loop exports, to form the second amplifying signal;
Peak value sampling module, for carrying out peak value sampling to this second amplifying signal, to form peak value sampling signal;
First comparison module, for the magnitude of voltage of the peak value and the first reference signal that compare this peak value sampling signal, obtains the first compare result signal; And
By this alerting signal, memory alarm module, for continuing output alarm signal according to this first compare result signal, to judge whether leakage current exceedes threshold value of dispatching from the factory.
2. leakage current test warning device as claimed in claim 1, it is characterized in that, described amplification module comprises:
First amplifying unit, for amplifying the described leakage current that leakage current test loop exports, obtains the first amplifying signal; And
Second amplifying unit, for amplifying this first amplifying signal, to form described second amplifying signal.
3. leakage current test warning device as claimed in claim 2, is characterized in that, also comprise:
First supply module, for providing the first supply voltage to described first amplifying unit; And
Second supply module, for providing second source voltage to described second amplifying unit.
4. leakage current test warning device as claimed in claim 1, is characterized in that, also comprise:
Second comparison module, for the magnitude of voltage of more described second amplifying signal and the magnitude of voltage of the second reference signal, obtains the second compare result signal; And
By this safe indicator signal, safe indicating module, for according to this second compare result signal output safety indicator signal, to judge that whether leakage current test loop is normal.
5. leakage current test warning device as claimed in claim 1, is characterized in that, also comprise:
Isolation module, for isolating the described leakage current that leakage current test loop exports, to input to described amplification module by the leakage current after isolation.
6. leakage current test warning device as claimed in claim 1, is characterized in that, also comprise:
Reseting module, for the described memory alarm module that resets, reports to the police to remove leakage current, makes leakage current test loop can carry out the leakage current test of next product to be detected.
7. leakage current test warning device as claimed in claim 1, it is characterized in that, described memory alarm module comprise in the first smooth alarm unit, acoustic alarm unit or switch alarm unit any one, report to the police if described alerting signal continues to drive one of those alarm units to send leakage current, then represent that current product to be detected is faulty item.
8. leakage current test warning device as claimed in claim 1, it is characterized in that, described safe indicating module comprises the second smooth alarm unit, if described safe indicator signal drives this second smooth alarm unit to send passage of scintillation light according to default flicker frequency, then represents that leakage current test loop is normal.
9. a multi-meter position tooling, is characterized in that, comprise at least one as arbitrary in claim 1 to 8 as described in leakage current test warning device.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850143A (en) * | 2019-10-25 | 2020-02-28 | 天津航空机电有限公司 | Multi-voltage acquisition and fault detection circuit for eliminating floating voltage |
| CN113608074A (en) * | 2021-06-17 | 2021-11-05 | 国网浙江省电力有限公司营销服务中心 | Automatic online monitoring method and system for multi-epitope voltage withstand test device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2515683Y (en) * | 2001-12-26 | 2002-10-09 | 北京浩华星电气设备技术开发有限公司 | Short-circuit and earth-fault indicator |
| CN1558248A (en) * | 2004-02-03 | 2004-12-29 | 台达电子工业股份有限公司 | Battery Ground Fault Detection Circuit |
| JP2007114190A (en) * | 2005-09-20 | 2007-05-10 | Daihen Corp | Leakage current resistance fraction detection method and device for it |
| CN102545143A (en) * | 2010-12-13 | 2012-07-04 | 华为技术有限公司 | Device and method for detection and protection and circuit board |
| JP2013178205A (en) * | 2012-02-29 | 2013-09-09 | Fuji Electric Fa Components & Systems Co Ltd | Current detection device |
-
2015
- 2015-07-29 CN CN201510455782.2A patent/CN105067974A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2515683Y (en) * | 2001-12-26 | 2002-10-09 | 北京浩华星电气设备技术开发有限公司 | Short-circuit and earth-fault indicator |
| CN1558248A (en) * | 2004-02-03 | 2004-12-29 | 台达电子工业股份有限公司 | Battery Ground Fault Detection Circuit |
| JP2007114190A (en) * | 2005-09-20 | 2007-05-10 | Daihen Corp | Leakage current resistance fraction detection method and device for it |
| CN102545143A (en) * | 2010-12-13 | 2012-07-04 | 华为技术有限公司 | Device and method for detection and protection and circuit board |
| JP2013178205A (en) * | 2012-02-29 | 2013-09-09 | Fuji Electric Fa Components & Systems Co Ltd | Current detection device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850143A (en) * | 2019-10-25 | 2020-02-28 | 天津航空机电有限公司 | Multi-voltage acquisition and fault detection circuit for eliminating floating voltage |
| CN110850143B (en) * | 2019-10-25 | 2021-12-03 | 天津航空机电有限公司 | Multi-voltage acquisition and fault detection circuit for eliminating floating voltage |
| CN113608074A (en) * | 2021-06-17 | 2021-11-05 | 国网浙江省电力有限公司营销服务中心 | Automatic online monitoring method and system for multi-epitope voltage withstand test device |
| CN113608074B (en) * | 2021-06-17 | 2024-05-28 | 国网浙江省电力有限公司营销服务中心 | Automatic online monitoring method and system for multi-epitope withstand voltage test device |
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