CN107340429A - The method and device of inverse electromotive force during for eliminating sweep test coil resistance - Google Patents
The method and device of inverse electromotive force during for eliminating sweep test coil resistance Download PDFInfo
- Publication number
- CN107340429A CN107340429A CN201710525551.3A CN201710525551A CN107340429A CN 107340429 A CN107340429 A CN 107340429A CN 201710525551 A CN201710525551 A CN 201710525551A CN 107340429 A CN107340429 A CN 107340429A
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- relay
- electric current
- electromotive force
- electric discharge
- electric
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- 238000012360 testing method Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005259 measurement Methods 0.000 claims abstract description 33
- 230000005611 electricity Effects 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 101100117775 Arabidopsis thaliana DUT gene Proteins 0.000 description 1
- 101150091805 DUT1 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The present invention relates to a kind of method and device for inverse electromotive force when eliminating sweep test coil resistance, including it is connected to the high-end discharge circuit driven with electric current between low side of electric current driving of relay array；Described discharge circuit includes electric discharge relay；The electric current of described electric discharge relay drives the electric current driving of high-end connection relay array high-end；Discharge the electric current driving low side that the electric current of relay drives low side to connect relay array, the control signal pin connection CPU of described electric discharge relay.The present invention is on original circuit base, two drive ends (HD＆LD) plus an electric discharge relay, before switching channel or switching range, the measurement electric current on perceptual measured piece is quickly bled off by the relay, avoids producing the current break of inverse electromotive force to eliminate inverse electromotive force.So as to avoid the damage of measuring instrument and improve measuring speed and the degree of accuracy.
Description
Technical field
It is especially a kind of anti-during sweep test coil resistance for eliminating the present invention relates to resistance scan measuring instrument field
To the method and device of electromotive force.
Background technology
For currently requiring the higher and higher market demand to the measuring speed of direct current resistance m easurem ent, constantly have new straight
Leakage resistance sweep measuring set occurs commercially, slightly having difference in these instrumental functions, but hardware structure is essentially identical (see attached
Fig. 1).Its hardware frame produces a constant current by reference voltage circuit and source circuit and flows through measured piece, in one section of time delayed signal
After stable, then the pressure drop by sampling circuit samples measured piece both ends, and give CPU data signal by ADC and do follow-up number
Word processing.Scan function is then to add relay array (see accompanying drawing 2) in constant-current source, sample circuit and measurement end, in CPU control
To realize that constant-current source and sampled signal switch in different measurement ends under system, and then realize the function of scanning.
But in scanning survey inductance coil or Transformer Winding, it is (different in passage switching or measuring range
Measuring range corresponds to different measurement electric currents) switching when, mutation of the test electric current in perceptual measured piece can produce very big anti-
To electromotive force, the measured line conduction of inverse electromotive force enters measuring instrument, so as to destroy instrument internal circuit, frequent breakage instrument
Device.In addition, these inverse electromotive forces cause subsequent measurement signal stabilization time special due to unappropriate discharge loop
It is long, so as to reduce measuring speed and the degree of accuracy.
The content of the invention
The technical problem to be solved in the present invention is：It is proposed a kind of for inverse electromotive force when eliminating sweep test coil resistance
Method and device, realize caused by elimination constant flow method sweep test inductance coil (also or Transformer Winding) reversely electronic
Gesture, so as to eliminating the destruction caused by the inverse electromotive force to circuit and the accuracy of measurement of lowering apparatus.
The technical solution adopted in the present invention is：A kind of side for inverse electromotive force when eliminating sweep test coil resistance
Method, comprise the following steps：
1) when Measurement channel switches, controlled by CPU and add electric discharge sequential；
2) after x channel measurements are completed, closure electric discharge relay, the electric current of relay array is made to drive high-end and electric current to drive
Short circuit is formed between dynamic low side；
3) the measurement electric current for flowing through tested perceptual device is discharged；
4) electric discharge relay is disconnected, and closes TCH test channel x+1 control relay, starts next channel measurement.
The electric current that further described electric discharge relay is connected to relay array drives high-end and electric current driving low side
Between.
Meanwhile present invention also offers a kind of device for inverse electromotive force when eliminating sweep test coil resistance, bag
Include the high-end discharge circuit driven with electric current between low side of electric current driving for being connected to relay array；Described discharge circuit bag
Include electric discharge relay；The electric current of described electric discharge relay drives the electric current driving of high-end connection relay array high-end；Electric discharge
The electric current driving low side of the electric current driving low side connection relay array of relay, the control signal of described electric discharge relay are drawn
Pin connects CPU.
The beneficial effects of the invention are as follows：The present invention on original circuit base, two drive ends (HD＆LD) plus one
Individual electric discharge relay, before switching channel or switching range, by the relay the measurement electric current on perceptual measured piece
Quickly bleed off, avoid producing the current break of inverse electromotive force to eliminate inverse electromotive force.So as to avoid measuring instrument
Damage and raising measuring speed and the degree of accuracy.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is four-terminal resistance sweep test sketch in the prior art；
Fig. 2 is prior art relay array circuit structure diagram；
Fig. 3 is the circuit structure diagram of the present invention；
Fig. 4 is the timing diagram of the present invention.
Embodiment
Presently in connection with accompanying drawing and preferred embodiment, the present invention is further detailed explanation.These accompanying drawings are simplified
Schematic diagram, only illustrate the basic structure of the present invention in a schematic way, therefore it only shows the composition relevant with the present invention.
As shown in figure 3, HD, LD be respectively measurement signal driving it is high-end and driving low side, come from constant-current source produce electricity
Road, it forms constant current resource loop；
HS, LS be respectively the sampling of measurement signal it is high-end and sampling low side, export to adc circuit so that draw measurement knot
Fruit；
K1~K2n is scanning survey relay array, Measurement channel switching during for scanning；
HD1, LD1, HS1, LS1 collectively form Measurement channel 1；HD2, LD2, HS2, LS2 collectively form Measurement channel 2；With
This analogizes, and HDn, LDn, HSn, LSn collectively form Measurement channel n；
DUT1, DUT2 ..., DUTn be measured piece；
Discharge circuit is made up of electric discharge relay and discharge control signal；K2n+1 is electric discharge relay；Relay_Ctrl1、
Relay_Ctrl2 ..., Relay_Ctrln and Disc_Ctrl be relay control signal, from CPU；
When Measurement channel switches, controlled by CPU and add electric discharge sequential, i.e., after x channel measurements are completed, closure is put first
Electrical relay K2n+1 (sets low control signal Disc_Ctrl) so that HD and LD is by relay K2n+1 short circuits of discharging, by one
After section delay (programmable), the measurement electric current for originally flowing through tested perceptual device bleeds off the gentle relay that is discharged, now again
(putting high control signal Relay_Ctrlx) Measurement channel x control relay is disconnected (due to now flowing through measured piece x electric current
0) not have the generation of inverse electromotive force, then disconnect electric discharge relay (putting high control signal Disc_Ctrl) and closing
TCH test channel x+1 control relay (setting low control signal Relay_Ctrlx+1) starts next channel measurement.
Illustrated with reference to timing diagram as shown in Figure 4：
tm:The testing time of each passage；
td:Discharge time, it may be programmed；
K1 is closed first, is delayed by appropriate measurement, that is, starts the test to first passage, and x passages are completed by tm
After measurement, closure electric discharge relay K2n+1 (setting low control signal Disc_Ctrl) first so that HD and LD pass through relay of discharging
Device K2n+1 short circuits, after one section is delayed td (programmable), the measurement electric current for originally flowing through tested perceptual device is put gentle
Electrical relay is bled off, and now disconnects the control relay of (putting high control signal Relay_Ctrlx) Measurement channel 1 (due to this
The electric current of Shi Liujing measured pieces 1 is the generation for 0) not having inverse electromotive force, then (puts high control letter in disconnection electric discharge relay
Number Disc_Ctrl) and close the control relay (setting low control signal Relay_Ctrl2) of TCH test channel 2 and start next passage
Measurement, the like complete whole scanning process.
In summary, this case can effectively eliminate anti-as caused by switching passage in constant current scanning survey perceptual device
To electromotive force, so as to be effectively protected measuring instrument and measured piece.
Meanwhile the relay that discharges provides a low impedance discharge loop for perceptual measured piece, greatly shortens ensuing survey
The stabilization time of signal is measured, improves measuring speed and the degree of accuracy (being directed to each winding of transformer) of measurement.
The embodiment of the simply present invention described in description above, various illustrations are not to the reality of the present invention
Matter Composition of contents limits, and person of an ordinary skill in the technical field can be to described in the past specific after specification has been read
Embodiment is made an amendment or deformed, without departing from the spirit and scope of the invention.
Claims (3)
- A kind of 1. method for inverse electromotive force when eliminating sweep test coil resistance, it is characterised in that comprise the following steps：1) when Measurement channel switches, controlled by CPU and add electric discharge sequential；2) after x channel measurements are completed, closure electric discharge relay, make the electric current driving of relay array high-end low with electric current driving Short circuit is formed between end；3) the measurement electric current for flowing through tested perceptual device is discharged；4) electric discharge relay is disconnected, and closes TCH test channel x+1 control relay, starts next channel measurement.
- 2. the method as claimed in claim 1 for inverse electromotive force when eliminating sweep test coil resistance, it is characterised in that： Described electric discharge relay is connected between the high-end driving low side with electric current of electric current driving of relay array.
- A kind of 3. device for inverse electromotive force when eliminating sweep test coil resistance, it is characterised in that：Including be connected to after The high-end discharge circuit driven with electric current between low side of electric current driving of electrical equipment array；Described discharge circuit includes electric discharge relay Device；The electric current of described electric discharge relay drives the electric current driving of high-end connection relay array high-end；The electricity of electric discharge relay The electric current driving low side of stream driving low side connection relay array；The control signal pin connection CPU of described electric discharge relay.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710525551.3A CN107340429A (en) | 2017-06-30 | 2017-06-30 | The method and device of inverse electromotive force during for eliminating sweep test coil resistance |
| CN202410393869.0A CN118362785A (en) | 2017-06-30 | 2017-06-30 | Method for eliminating back electromotive force during scanning test coil resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710525551.3A CN107340429A (en) | 2017-06-30 | 2017-06-30 | The method and device of inverse electromotive force during for eliminating sweep test coil resistance |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410393869.0A Division CN118362785A (en) | 2017-06-30 | 2017-06-30 | Method for eliminating back electromotive force during scanning test coil resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107340429A true CN107340429A (en) | 2017-11-10 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410393869.0A Pending CN118362785A (en) | 2017-06-30 | 2017-06-30 | Method for eliminating back electromotive force during scanning test coil resistance |
| CN201710525551.3A Pending CN107340429A (en) | 2017-06-30 | 2017-06-30 | The method and device of inverse electromotive force during for eliminating sweep test coil resistance |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202410393869.0A Pending CN118362785A (en) | 2017-06-30 | 2017-06-30 | Method for eliminating back electromotive force during scanning test coil resistance |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2138795Y (en) * | 1992-08-05 | 1993-07-21 | 杨意逢 | Inductance inner resistance fast measurer |
| CN2901330Y (en) * | 2006-04-20 | 2007-05-16 | 青岛艾诺电子仪器有限公司 | AC/DC withstand voltage insulation detector with high precision and high speed detecting and control circuit |
| CN202142476U (en) * | 2011-07-08 | 2012-02-08 | 保定市金源科技有限公司 | Change-over switch of transformer DC resistor tester |
| CN104749440A (en) * | 2015-04-03 | 2015-07-01 | 国家电网公司 | Large power transformer direct-current resistance fast testing method |
| CN206975118U (en) * | 2017-06-30 | 2018-02-06 | 常州同惠电子股份有限公司 | A kind of device for inverse electromotive force when eliminating sweep test coil resistance |
-
2017
- 2017-06-30 CN CN202410393869.0A patent/CN118362785A/en active Pending
- 2017-06-30 CN CN201710525551.3A patent/CN107340429A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2138795Y (en) * | 1992-08-05 | 1993-07-21 | 杨意逢 | Inductance inner resistance fast measurer |
| CN2901330Y (en) * | 2006-04-20 | 2007-05-16 | 青岛艾诺电子仪器有限公司 | AC/DC withstand voltage insulation detector with high precision and high speed detecting and control circuit |
| CN202142476U (en) * | 2011-07-08 | 2012-02-08 | 保定市金源科技有限公司 | Change-over switch of transformer DC resistor tester |
| CN104749440A (en) * | 2015-04-03 | 2015-07-01 | 国家电网公司 | Large power transformer direct-current resistance fast testing method |
| CN206975118U (en) * | 2017-06-30 | 2018-02-06 | 常州同惠电子股份有限公司 | A kind of device for inverse electromotive force when eliminating sweep test coil resistance |
Non-Patent Citations (1)
| Title |
|---|
| 马卫平: "高压自耦变压器直流电阻的现场快速测量" * |
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| Publication number | Publication date |
|---|---|
| CN118362785A (en) | 2024-07-19 |
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Application publication date: 20171110 |