CN102121959A - Intelligent detection circuit for electric leakage of network probe - Google Patents
Intelligent detection circuit for electric leakage of network probe Download PDFInfo
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- CN102121959A CN102121959A CN201010567170XA CN201010567170A CN102121959A CN 102121959 A CN102121959 A CN 102121959A CN 201010567170X A CN201010567170X A CN 201010567170XA CN 201010567170 A CN201010567170 A CN 201010567170A CN 102121959 A CN102121959 A CN 102121959A
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Abstract
The invention relates to a detection circuit for electric leakage, in particular to an intelligent detection circuit for the electric leakage of a network probe, relating to the technical field of signal tests and solving the problems of high complexity and heavy workload because the electric leakage conditions of the network probe of a detonation test point are manually detected in the prior art. The intelligent detection circuit for the electric leakage of the network probe is used for intelligently detecting whether multipath network probes are subjected to the electric leakage or not under the condition of loading voltage of hundreds of volts in a detonation test, overcomes the defects of great complexity of manual detection and greatly decreases the workload. The intelligent detection circuit comprises a man-machine interaction control module, a relay matrix circuit module, a network probe circuit module, an electric leakage detection circuit module and a CPLD (Complex Programmable Logic Device) control circuit module, wherein the CPLD control circuit module comprises a channel selection control module and a leakage current display module. The intelligent detection circuit provided by the invention is mainly applied to occasions for detection of the electric leakage of the network probes.
Description
Technical field
The present invention relates to a kind of electric-leakage detection circuit in the signal testing technical field, particularly relate to a kind of network probe electric leakage Intelligent Measurement circuit.
Background technology
Need differently to form the sequence of electric pulses signal by probe short circuit constantly time of delivery (TOD) interval measurement instrument and oscillograph clocks and data acquisition in the detonation test with what detonation wave arrived.Because the voltage that the detonation test is added on the probe time has several hectovolts, cause the test circuit electric leakage easily, thereby when detonation is tested the pulse-losing signal, the detonation test data of experiment is lost.Whether used the every road network network of multimeter manual test probe to leak electricity in the past, the network probe electric leakage situation of tens even up to a hundred detonation test points of manual inspection is very loaded down with trivial details, workload is big.
The present Chinese patent literature patent No. 200520118736.5, the publication name is called " electric-leakage detection circuit ", and whether the live wire or the zero line that adopt optocoupler and controllable silicon to detect in attaching plug/socket power output line exist leaky.The patent No. 200920182584.3 publication titles " electric-leakage detection circuit system " adopt single-chip microcomputer, rectification circuit and relay matrix driving circuit that the multichannel three-phase electricity is realized the leakage current detection and carries out open circuit protection.They all are to detect power lead or attaching plug/socket electric leakage situation, are not suitable for the network probe detection of electrical leakage of detonation test point.
Summary of the invention
The objective of the invention is to solve the complexity and the big problem of workload of manual inspection detonation test point network probe electric leakage situation in the prior art.Propose a kind of network probe electric leakage Intelligent Measurement circuit, be used for Intelligent Measurement detonation test multi-channel network probe, overcome the very loaded down with trivial details defective of manual inspection, saved workload greatly loading the situation whether electric leakage is arranged under a few hectovolt voltage condition.
For achieving the above object, the technical solution used in the present invention is:
A kind of network probe electric leakage Intelligent Measurement circuit, comprise human-computer interactive control module, relay matrix circuit module, network probe circuit module, electric-leakage detection circuit module, CPLD control circuit module, wherein: the human-computer interactive control module, be used to issue and the channel switch order be set, display channel electric leakage state; The CPLD control circuit module, comprise channel selecting control module, leakage current display module, the channel selecting control module is used to receive the channel selecting control command of man-machine interaction control module, and pilot relay matrix circuit module, the leakage current display module receives the output signal of electric-leakage detection circuit module; The relay matrix circuit module is used for receiving cable and selects control module channel selecting signal and Control Network probe circuit module and electric-leakage detection circuit module; The network probe circuit module is owing to provide the detection of electrical leakage signal to testing circuit; The electric-leakage detection circuit module, whether be used to detect network probe has leaky; Wherein human-computer interactive control module, channel selecting control module, relay matrix circuit module, electric-leakage detection circuit module, electric leakage display control module, human-computer interactive control sequence of modules are electrically connected, the relay matrix circuit module is electrically connected with the network probe circuit module, and the network probe circuit module is electrically connected with the electric-leakage detection circuit module.
Described network probe electric leakage Intelligent Measurement circuit also comprises the electric current microampere meter that shows leakage current, and the electric current microampere meter is electrically connected with the electric-leakage detection circuit module.
Described relay matrix circuit module comprises the multicircuit relay control circuit.
Described multi-channel network probe circuit is corresponding with the multicircuit relay control circuit.
Described control relay circuit comprises photoelectrical coupler U1, relay J 1, the pin U11 of photoelectrical coupler U1 is electrically connected with the passage control module, the photoelectrical coupler U1 second pin U12, three-prong U13 altogether, the 5th pin U15 of photoelectrical coupler U1 is connected with relay J 1 three-prong J13, relay J 1 second pin J12 is connected with first resistance R 1 of network probe circuit module, relay J 1 the 8th pin J18 is connected with the 3rd current-limiting resistance R3 of electric-leakage detection circuit module, the 5th divider resistance R5 of relay J 1 the 4th pin J14 and electric-leakage detection circuit module, the 6th divider resistance R6 junction connects.
Described network probe circuit comprises first resistance R 1, capacitor C 1, second resistance R 2 and probe T1, first resistance R 1 is connected with relay J 1 second pin J12, first resistance R 1 is connected with the metal probe layer Ta of capacitor C 1, probe T1 respectively, capacitor C 1 other end is connected with second resistance R 2, and the silver coating layer Tb of second resistance R, 2 other ends and probe be ground connection simultaneously.
Described electric-leakage detection circuit module comprises the 3rd current-limiting resistance R3, emitter follower, photoelectrical coupler U2, the 3rd current-limiting resistance R3 links to each other with relay J 1 the 8th pin J18, the 3rd current-limiting resistance R3 other end links to each other with electric current microampere meter A, the electric current microampere meter A other end is connected with emitter follower, the emitter follower other end links to each other with the photoelectrical coupler U2 first pin U21, and photoelectrical coupler U2 the 4th pin U24 is electrically connected with the electric leakage display circuit module.
Described emitter follower comprises the 4th current-limiting resistance R4, the 5th divider resistance R5, the 6th divider resistance R6, the 7th current-limiting resistance R7, the first triode Q1, the second triode Q2, the 4th current-limiting resistance R4 is connected with electric current microampere meter A, the 4th current-limiting resistance R4 other end respectively with the 5th divider resistance R5, the first triode Q1 base stage links to each other, the 5th divider resistance R5 other end is connected with the 6th divider resistance R6, the 6th divider resistance R6 other end respectively with the second triode Q2 emitting stage, the 7th current-limiting resistance R7 connects, the first triode Q1 emitting stage is connected with the second triode Q2 base stage, the 7th current-limiting resistance R7 other end is connected with the first pin U21 of photoelectrical coupler U2, and the 4th pin U24 of photoelectrical coupler U2 is electrically connected with the electric leakage display control module.
Described probe T1 is a kind of of silver coating coaxial probe, spring polished rod probe, screw thread polished rod probe, film probe or silver lid probe.
From the architectural feature of the invention described above as can be seen, its advantage is: the present invention effectively reduces manual inspection multi-channel network probe electric leakage consumed time and workload, and the Intelligent Measurement circuit working is reliable, has very strong practicality.
Description of drawings
The present invention will illustrate by way of compared with accompanying drawings and combined with example:
Silver coating coaxial probe structural representation among Fig. 1 the present invention;
Fig. 2 system principle diagram of the present invention;
The structured flowchart of Fig. 3 network probe electric leakage Intelligent Measurement circuit;
Fig. 4 one-way network probe electric leakage of the present invention Intelligent Measurement circuit theory diagrams;
Reference numeral 1-1 is insulation course for metal probe 1-2 for silver coating 1-3
1-4 is the IC pulse shaping circuit for metal tube 1-4
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Principle analysis: the electric-leakage detection circuit design adds probe voltage for successively the multi-channel network circuit by the control of CPLD circuit control module by putting in order of network, detect each road probe silver plated film and metal probe successively by behind the insulation course whether after the conducting, if the probe insulation course damages or the insulation course withstand voltage is not enough, probe will leak electricity in short circuit, then needs to change again probe.Probe structure as shown in Figure 1.
Overall design: the theory diagram of system mainly comprises as shown in Figure 2: human-computer interactive control module (display), CPLD control circuit module, relay matrix circuit module, network probe circuit module, electric-leakage detection circuit module.Realize efficient work, intellectuality in order to make whole network probe electric-leakage detection circuit, the CPLD control circuit module mainly is to utilize programmable logic device (PLD) (CPLD) as system intelligence control core devices, designed channel is selected control module and leakage current display module, and wherein the human-computer interactive control module is electrically connected with the channel selecting control module.Matrix circuit module electricity links to each other the channel selecting control module, the relay matrix circuit module is electrically connected respectively at network probe circuit module and electric-leakage detection circuit module input with relay (two on-off circuits of a relay control), and the electric-leakage detection circuit module links to each other with leakage current indicator gauge (microampere meter) electricity.
At first issue the channel number control command that control need detect by the human-computer interactive control module, passage gate control circuit module receives the order of man-machine interaction control module, and pilot relay matrix circuit module, make the electric-leakage detection circuit module connection of network probe circuit module and corresponding control carry out circuit test, the output signal of electric-leakage detection circuit module goes to control leakage circuit display control circuit module, leakage circuit display control circuit module final output signal and at display display channel electric leakage state.As shown in Figure 3, wherein the human-computer interactive control module is provided with channel switch by the channel selecting control module, sequential control control relay circuit 1, control relay circuit 2 is until control relay circuit N (N represents the quantity of detonation experiment test point), make network probe circuit 1, network probe circuit 2 is connected by relay matrix circuit module and electric-leakage detection circuit module respectively until network probe circuit N, whether detect each road network network has leakage current and shows leakage current by the electric current microampere meter among Fig. 3, have the probe circuit feedback high level of electric leakage to give the electric leakage display control module simultaneously, the electric leakage display control module is presented at the result of certain road electric leakage on the display.
Design process: with Fig. 4 one-way network probe electric leakage Intelligent Measurement circuit theory diagrams is example, and concrete oneway circuit design process is described:
1. relay matrix circuit module
The relay matrix circuit module comprises the multicircuit relay control module, control relay circuit comprises photoelectrical coupler U1, relay J 1, the pin U11 of photoelectrical coupler U1 is electrically connected with the passage control module, the photoelectrical coupler U1 second pin U12, three-prong U13 altogether, the 5th pin U15 of photoelectrical coupler U1 is connected with relay J 1 three-prong J13, relay J 1 second pin J12 is connected with first resistance R 1 of network probe circuit module, relay J 1 the 8th pin J18 is connected with the 3rd current-limiting resistance R3 of electric-leakage detection circuit module, the 5th divider resistance R5 of relay J 1 the 4th pin J14 and electric-leakage detection circuit module, the 6th divider resistance R6 junction connects.(U1: input end is a light emitting diode to photoelectrical coupler U1, and output terminal is that base stage receives triode, and input end and output terminal isolation voltage are greater than 500V.Wherein the first pin U11 is the light emitting diode input end, and the second pin U12 is the light emitting diode output terminal, and the 6th pin U16 is the triode base stage, and the 5th pin U15 is the triode collector, and the 4th pin U14 is the triode emitter.When input has the conducting of galvanoluminescence diode light emitting transistor.The purposes here is that the ground of the ground of CPLD low-voltage control circuit and network negative high voltage is isolated, and avoids control circuit to be subjected to the interference of rear end high-tension circuit).
2. network probe circuit module
The network probe circuit module comprises and the corresponding network probe circuit of control relay circuit, the network probe circuit comprises that (Ta is a metal probe for the silver coating coaxial probe T1 of first resistance R 1, capacitor C 1, second resistance R 2 and several hectovolts of proof voltage, Tb is a silver coating), first resistance R 1 is connected with relay J 1 second pin J12, first resistance R 1 is connected with the metal probe layer Ta of capacitor C 1, probe T1 respectively, capacitor C 1 other end is connected with second resistance R 2, and the silver coating layer Tb of second resistance R, 2 other ends, probe be ground connection simultaneously.
If a relay can select to control the M way switch, the control relay circuit that N road network network probe circuit is then corresponding just has the N/M road.
Probe type comprises silver coating coaxial probe, spring polished rod probe, screw thread polished rod probe, film probe or silver lid probe etc.
3. electric-leakage detection circuit module
The electric-leakage detection circuit module comprises the 3rd current-limiting resistance R3, emitter follower, photoelectrical coupler U2, the 3rd current-limiting resistance R3 links to each other with relay J 1 the 8th pin J18, the 3rd current-limiting resistance R3 other end links to each other with electric current microampere meter A, the electric current microampere meter A other end is connected with emitter follower, the emitter follower other end links to each other with photoelectrical coupler U2 (the same U1 of model) the first pin U21, and photoelectrical coupler U2 the 4th pin U24 is electrically connected with the electric leakage display circuit module.Emitter follower comprises the 4th current-limiting resistance R4, the 5th divider resistance R5, the 6th divider resistance R6, the 7th current-limiting resistance R7, the first triode Q1, the second triode Q2, the 4th current-limiting resistance R4 is connected with electric current microampere meter A, the 4th current-limiting resistance R4 other end respectively with the 5th divider resistance R5, the first triode Q1 base stage links to each other, the 5th divider resistance R5 other end is connected with the 6th divider resistance R6, the 6th divider resistance R6 other end respectively with the second triode Q2 emitting stage, the 7th current-limiting resistance R7 connects, the first triode Q1 emitting stage is connected with the second triode Q2 base stage, the 7th current-limiting resistance R7 other end is connected with the pin one of photoelectrical coupler U2, and the pin 4 of photoelectrical coupler U2 is electrically connected with the electric leakage display control module.
In a word, negative high voltage V2 is connected with first resistance R 1 through relay J 1 second, four pin J12, J14 before detection of electrical leakage, first resistance R, 1 other end is connected with probe T1, capacitor C 1 respectively, the C1 other end is connected with second resistance R 2, and probe T1 is connected negative high voltage ground G2 jointly with second resistance R, 2 other ends.The a point voltage is zero when probe T1 leaks electricity, and negative high voltage is added on first resistance R 1, and negative high voltage gives capacitor C 1 charging by first resistance R 1 during probe T1 leakproof, and a point voltage is negative high voltage V2, the negative high voltage scope (20V～-400V).
The human-computer interactive control module is by the order of sendaisle gating signal during detection of electrical leakage, the order of passage gate control circuit module receiving cable gating signal, the output control signal is given the pin one input high level of photoelectrical coupler U1, photoelectrical coupler U1 the 5th pin U15 output low level, relay J 1 adhesive pin J12 links to each other with pin J18, the a point voltage is higher than the c point voltage when probe T1 leaks electricity, thereby the b point voltage is higher than the c point voltage, and the d point voltage is higher than the c point voltage, such first triode Q1, the second triode Q2 conducting, electric current microampere meter A has leakage current to show, and photoelectrical coupler U2 conducting the 4th pin U24 output high level signal Vout give leakage circuit display control circuit module, and the result of leaking electricity is presented on the display.The a point voltage equates that with the c point voltage triode Q1, Q2 end when probe T1 leakproof, and electric current microampere meter A leakage current shows.Wherein, V1: relay power voltage; V2: the negative high voltage of network probe circuit; V3: the supply voltage 24V of the first triode Q1, the second triode Q2, its value is V2+12V; V4 is the supply voltage of photoelectrical coupler U2.
Disclosed all features in this instructions except mutually exclusive feature, all can make up by any way.
Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
Claims (9)
1. a network probe electric leakage Intelligent Measurement circuit is characterized in that comprising human-computer interactive control module, relay matrix circuit module, network probe circuit module, electric-leakage detection circuit module, CPLD control circuit module, wherein:
The human-computer interactive control module is used to issue and the channel switch order is set, display channel electric leakage state; The CPLD control circuit module, comprise channel selecting control module, leakage current display module, the channel selecting control module is used to receive the channel selecting control command of man-machine interaction control module, and pilot relay matrix circuit module, the leakage current display module receives the output signal of electric-leakage detection circuit module; The relay matrix circuit module is used for receiving cable and selects control module channel selecting signal and Control Network probe circuit module and electric-leakage detection circuit module;
The network probe circuit module is used for providing the detection of electrical leakage signal to testing circuit;
The electric-leakage detection circuit module, whether be used to detect network probe has leaky;
Wherein human-computer interactive control module, channel selecting control module, relay matrix circuit module, electric-leakage detection circuit module, electric leakage display control module, human-computer interactive control sequence of modules are electrically connected, the relay matrix circuit module is electrically connected with the network probe circuit module, and the network probe circuit module is electrically connected with the electric-leakage detection circuit module.
2. a kind of network probe electric leakage Intelligent Measurement circuit according to claim 1 is characterized in that described network probe electric leakage Intelligent Measurement circuit also comprises the electric current microampere meter that shows leakage current, and the electric current microampere meter is electrically connected with the electric-leakage detection circuit module.
3. a kind of network probe electric leakage Intelligent Measurement circuit according to claim 1 is characterized in that described relay matrix circuit module comprises the multicircuit relay control circuit.
4. a kind of network probe electric leakage Intelligent Measurement circuit according to claim 1 is characterized in that described multi-channel network probe circuit and multicircuit relay control circuit connect one to one.
5. a kind of network probe electric leakage Intelligent Measurement circuit according to claim 3, it is characterized in that described control relay circuit comprises photoelectrical coupler (U1), relay (J1), the pin (U11) of photoelectrical coupler (U1) is electrically connected with the passage control module, photoelectrical coupler (U1) second pin (U12), three-prong (U13) altogether, the 5th pin (U15) of photoelectrical coupler (U1) is connected with relay (J1) three-prong (J13), relay (J1) second pin (J12) is connected with first resistance (R1) of network probe circuit module, relay (J1) the 8th pin (J18) is connected with the 3rd current-limiting resistance (R3) of electric-leakage detection circuit module, the 5th divider resistance (R5) of relay (J1) the 4th pin (J14) and electric-leakage detection circuit module, the 6th divider resistance (R6) junction connects.
6. a kind of network probe electric leakage Intelligent Measurement circuit according to claim 4, it is characterized in that described network probe circuit comprises first resistance (R1), electric capacity (C1), second resistance (R2) and probe (T1), first resistance (R1) is connected with relay (J1) second pin (J12), first resistance (R1) is connected with the metal probe layer (Ta) of electric capacity (C1), probe (T1) respectively, electric capacity (C1) other end is connected with second resistance (R2), and the silver coating layer (Tb) of second resistance (R2) other end and probe is ground connection simultaneously.
7. a kind of network probe electric leakage Intelligent Measurement circuit according to claim 1, it is characterized in that described electric-leakage detection circuit module comprises the 3rd current-limiting resistance (R3), emitter follower, photoelectrical coupler (U2), the 3rd current-limiting resistance (R3) links to each other with relay (J1) the 8th pin (J18), the 3rd current-limiting resistance (R3) other end links to each other with electric current microampere meter (A), electric current microampere meter (A) other end is connected with emitter follower, the emitter follower other end links to each other with photoelectrical coupler (U2) first pin (U21), and photoelectrical coupler (U2) the 4th pin (U24) is electrically connected with the electric leakage display circuit module.
8. a kind of network probe electric leakage Intelligent Measurement circuit according to claim 1, it is characterized in that described emitter follower comprises the 4th current-limiting resistance (R4), the 5th divider resistance (R5), the 6th divider resistance (R6), the 7th current-limiting resistance (R7), first triode (Q1), second triode (Q2), the 4th current-limiting resistance (R4) is connected with electric current microampere meter (A), the 4th current-limiting resistance (R4) other end respectively with the 5th divider resistance (R5), first triode (Q1) base stage links to each other, the 5th divider resistance (R5) other end is connected with the 6th divider resistance (R6), the 6th divider resistance (R6) other end respectively with second triode (Q2) emitting stage, the 7th current-limiting resistance (R7) connects, first triode (Q1) emitting stage is connected with second triode (Q2) base stage, the 7th current-limiting resistance (R 7) other end is connected with first pin (U21) of photoelectrical coupler (U2), and the 4th pin (U24) of photoelectrical coupler (U2) is electrically connected with the electric leakage display control module.
9. a kind of network probe electric leakage Intelligent Measurement circuit according to claim 1 is characterized in that described probe (T1) is a kind of of silver coating coaxial probe, spring polished rod probe, screw thread polished rod probe, film probe or silver lid probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010567170XA CN102121959B (en) | 2010-11-30 | 2010-11-30 | Intelligent detection circuit for electric leakage of network probe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010567170XA CN102121959B (en) | 2010-11-30 | 2010-11-30 | Intelligent detection circuit for electric leakage of network probe |
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| CN102121959A true CN102121959A (en) | 2011-07-13 |
| CN102121959B CN102121959B (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010567170XA Expired - Fee Related CN102121959B (en) | 2010-11-30 | 2010-11-30 | Intelligent detection circuit for electric leakage of network probe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439582A (en) * | 2013-08-28 | 2013-12-11 | 三星高新电机（天津）有限公司 | Testing device of detection blocks |
| CN104101855A (en) * | 2014-07-24 | 2014-10-15 | 上海华力微电子有限公司 | Probe card electric leakage monitoring method and probe card electric leakage monitoring system |
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| CN1091835A (en) * | 1993-11-10 | 1994-09-07 | 江苏省电力试验研究所 | Lightning arrester leakance detects and discharge counter |
| US6011398A (en) * | 1998-04-23 | 2000-01-04 | Associated Research, Inc. | Current-leakage tester |
| CN201331564Y (en) * | 2008-12-03 | 2009-10-21 | 泉州雷航电子有限公司 | Intelligent creepage and fire detection circuit system |
| CN201489074U (en) * | 2009-02-17 | 2010-05-26 | 泉州纪超电子有限公司 | Leakage fire sensing circuit |
| CN201897625U (en) * | 2010-11-30 | 2011-07-13 | 中国工程物理研究院流体物理研究所 | Intelligent networked probe leakage detection circuit |
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2010
- 2010-11-30 CN CN201010567170XA patent/CN102121959B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091835A (en) * | 1993-11-10 | 1994-09-07 | 江苏省电力试验研究所 | Lightning arrester leakance detects and discharge counter |
| US6011398A (en) * | 1998-04-23 | 2000-01-04 | Associated Research, Inc. | Current-leakage tester |
| CN201331564Y (en) * | 2008-12-03 | 2009-10-21 | 泉州雷航电子有限公司 | Intelligent creepage and fire detection circuit system |
| CN201489074U (en) * | 2009-02-17 | 2010-05-26 | 泉州纪超电子有限公司 | Leakage fire sensing circuit |
| CN201897625U (en) * | 2010-11-30 | 2011-07-13 | 中国工程物理研究院流体物理研究所 | Intelligent networked probe leakage detection circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439582A (en) * | 2013-08-28 | 2013-12-11 | 三星高新电机（天津）有限公司 | Testing device of detection blocks |
| CN104101855A (en) * | 2014-07-24 | 2014-10-15 | 上海华力微电子有限公司 | Probe card electric leakage monitoring method and probe card electric leakage monitoring system |
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| CN102121959B (en) | 2013-12-11 |
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