CN102121959B - 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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- CN102121959B CN102121959B CN201010567170XA CN201010567170A CN102121959B CN 102121959 B CN102121959 B CN 102121959B CN 201010567170X A CN201010567170X A CN 201010567170XA CN 201010567170 A CN201010567170 A CN 201010567170A CN 102121959 B CN102121959 B CN 102121959B
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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 Intelligent detection circuit for electric leakage of network probe.
Background technology
In detonation test, need detonation wave is arrived not in the same time by probe short circuit formation sequence electric impulse signal, time of delivery (TOD) interval measurement instrument and oscillograph is clocked and data acquisition.The voltage be added in while testing due to detonation on probe has several hectovolts, easily causes test circuit electric leakage, thus when Detonation Experiments the pulse-losing signal, the Detonation Experiments test data is lost.Whether use in the past the every road network network of multimeter manual test probe to leak electricity, tens of the manual inspection even network probe electric leakage situation of up to a hundred detonation test points are very loaded down with trivial details, workload is large.
The current 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 the power plug/socket power supply 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 to realize leakage current test and carry out open circuit protection the multichannel three-phase electricity.They are all to detect power lead or power 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 complexity and the large problem of workload of manual inspection detonation test point network probe electric leakage situation in prior art.Propose a kind of Intelligent detection circuit for electric leakage of network probe, for Intelligent Measurement detonation test multi-channel network probe, in the situation that whether a few hectovolt voltage of loading has the situation of electric leakage, overcome the very loaded down with trivial details defect of manual inspection, greatly saved workload.
For achieving the above object, the technical solution used in the present invention is:
A kind of Intelligent detection circuit for electric leakage of network probe, 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, for issuing, the channel switch order is set, display channel electric leakage state; CPLD control circuit module, comprise channel selecting control module, leakage current display module, the channel selecting control module is for receiving 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, select the control module channel selecting signal and control the network probe circuit module and the electric-leakage detection circuit module for receiving cable; The network probe circuit module, due to the detection of electrical leakage signal being provided to testing circuit; Whether the electric-leakage detection circuit module, have leaky for detection of network probe; 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 to, the relay matrix circuit module is electrically connected to the network probe circuit module, and the network probe circuit module is electrically connected to the electric-leakage detection circuit module.
Described Intelligent detection circuit for electric leakage of network probe also comprises the electric current microampere meter that shows leakage current, and the electric current microampere meter is electrically connected to 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 to the passage control module, photoelectrical coupler U1 the 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 the 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 the first resistance R 1, capacitor C 1, the second resistance R 2 and probe T1, the first resistance R 1 is connected with relay J 1 second pin J12, the 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 the 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 is connected with relay J 1 the 8th pin J18, the 3rd current-limiting resistance R3 other end is connected with electric current microampere meter A, the electric current microampere meter A other end is connected with emitter follower, the emitter follower other end is connected with photoelectrical coupler U2 the first pin U21, and photoelectrical coupler U2 the 4th pin U24 is electrically connected to 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 is connected, 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, the 4th pin U24 of photoelectrical coupler U2 is electrically connected to 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, can find out, its advantage is: the present invention effectively reduces time and the workload that the electric leakage of manual inspection multi-channel network probe expends, and the Intelligent detection circuit reliable operation, have very strong practicality.
The accompanying drawing explanation
The present invention will illustrate by way of compared with accompanying drawings and combined with example:
Silver coating coaxial probe structural representation in Fig. 1 the present invention;
Fig. 2 system principle diagram of the present invention;
The structured flowchart of Fig. 3 Intelligent detection circuit for electric leakage of network probe;
Fig. 4 one-way network probe electric leakage of the present invention Intelligent detection circuit schematic diagram;
Reference numeral 1-1 is that metal probe 1-2 is that silver coating 1-3 is insulation course
1-4 is that metal tube 1-4 is the IC pulse shaping circuit
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Principle analysis: the electric-leakage detection circuit design is controlled by putting in order of network and is added probe voltage to the multi-channel network circuit successively by the CPLD circuit control module, detect successively each road probe silver plated film and metal probe by after insulation course whether after conducting, if the probe insulation course damages or the insulation course withstand voltage is inadequate, probe will leak electricity in short circuit, needs again to change probe.Probe structure as shown in Figure 1.
Overall design: the theory diagram of system as shown in Figure 2, mainly comprises: 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, CPLD control circuit module is mainly to utilize programmable logic device (PLD) (CPLD) as system intelligence control core device, designed channel is selected control module and leakage current display module, and wherein the human-computer interactive control module is electrically connected to the channel selecting control module.The channel selecting control module is connected with relay (two on-off circuits of a Control) matrix circuit module electricity, the relay matrix circuit module is electrically connected to respectively at network probe circuit module and electric-leakage detection circuit module input, and the electric-leakage detection circuit module is connected with leakage current indicator gauge (microampere meter) electricity.
At first issue by the human-computer interactive control module channel number control command that control need to detect, 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 at display display channel electric leakage state.As shown in Figure 3, wherein the human-computer interactive control module arranges 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 means the quantity of Detonation Experiments test point), make network probe circuit 1, network probe circuit 2 is until network probe circuit N passes through respectively relay matrix circuit module and the connection of electric-leakage detection circuit module, whether detect each road network network has leakage current and shows leakage current by the electric current microampere meter in Fig. 3, the probe circuit feedback high level of electric leakage is arranged simultaneously to the electric leakage display control module, the result of electric leakage display control module Ba Mou road electric leakage is presented on display.
Design process: Fig. 4 one-way network probe of take electric leakage Intelligent detection circuit schematic diagram 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 to the passage control module, photoelectrical coupler U1 the 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 the 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 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 the isolation of the ground of the ground of CPLD low-voltage control circuit and network negative high voltage, avoids control circuit to be subject to the interference of rear end high-tension circuit).
2. network probe circuit module
The network probe circuit module comprises the network probe circuit corresponding with control relay circuit, the network probe circuit comprises that (Ta is metal probe for the silver coating coaxial probe T1 of the first resistance R 1, capacitor C 1, the second resistance R 2 and several hectovolts of proof voltage, Tb is silver coating), the first resistance R 1 is connected with relay J 1 second pin J12, the 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 the 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, N road network network probe circuit is the control relay circuit Jiu You N/M road of correspondence.
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 is connected with relay J 1 the 8th pin J18, the 3rd current-limiting resistance R3 other end is connected with electric current microampere meter A, the electric current microampere meter A other end is connected with emitter follower, the emitter follower other end is connected with photoelectrical coupler U2 (the same U1 of model) the first pin U21, and photoelectrical coupler U2 the 4th pin U24 is electrically connected to 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 is connected, 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, the pin 4 of photoelectrical coupler U2 is electrically connected to the electric leakage display control module.
In a word, before detection of electrical leakage, negative high voltage V2 is connected with the first resistance R 1 through relay J 1 second, four pin J12, J14, first resistance R 1 other end is connected with probe T1, capacitor C 1 respectively, the C1 other end is connected with the second resistance R 2, and probe T1 is connected negative high voltage ground G2 jointly with second resistance R 2 other ends.When probe T1 leaks electricity, a point voltage is zero, and negative high voltage is added on the first resistance R 1, and during probe T1 leakproof, negative high voltage gives capacitor C 1 charging by the first resistance R 1, and a point voltage is negative high voltage V2, the negative high voltage scope (20V～-400V).
During detection of electrical leakage, the human-computer interactive control module is by the order of sendaisle gating signal, the order of passage gate control circuit module receiving cable gating signal, the output control signal is to 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 is connected with pin J18, when probe T1 leaks electricity, a point voltage is higher than the c point voltage, 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 the 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 is to leakage circuit display control circuit module, the result of electric leakage is presented on display.When probe T1 leakproof, a point voltage equates with the c point voltage, triode Q1, Q2 cut-off, 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; The supply voltage that V4 is photoelectrical coupler U2.
Disclosed all features in this instructions, except mutually exclusive feature, all can combine by any way.
Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing), 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 similar characteristics.
Claims (2)
1. an Intelligent detection circuit for electric leakage of network probe, 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, arrange the channel selecting control command for issuing, display channel electric leakage state;
CPLD control circuit module, comprise channel selecting control module, leakage current display module, the channel selecting control module is for receiving 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, select control module channel selecting control command and control the network probe circuit module and the electric-leakage detection circuit module for receiving cable;
The network probe circuit module, for providing the detection of electrical leakage signal to testing circuit;
Whether the electric-leakage detection circuit module, have leaky for detection of network probe;
Wherein human-computer interactive control module, channel selecting control module, relay matrix circuit module, electric-leakage detection circuit module, leakage current display module, human-computer interactive control sequence of modules are electrically connected to, the relay matrix circuit module is electrically connected to the network probe circuit module, and the network probe circuit module is electrically connected to the electric-leakage detection circuit module;
Described electric-leakage detection circuit module comprises the 3rd current-limiting resistance (R3), emitter follower, the second photoelectrical coupler (U2), and 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);
Described relay matrix circuit module comprises the multicircuit relay control circuit, described network probe circuit module comprises the multi-channel network probe circuit, described multi-channel network probe circuit and multicircuit relay control circuit connect one to one, described control relay circuit comprises the first photoelectrical coupler (U1), relay (J1), described network probe circuit comprises the first resistance (R1), electric capacity (C1), the second resistance (R2) and probe (T1), described Intelligent detection circuit for electric leakage of network probe also comprises the electric current microampere meter (A) that shows leakage current, electric current microampere meter (A) is electrically connected to the electric-leakage detection circuit module,
The 3rd current-limiting resistance (R3) is connected with relay (J1) the 8th pin J18, the 3rd current-limiting resistance (R3) other end is connected with electric current microampere meter (A), electric current microampere meter (A) other end is connected with emitter follower, the emitter follower other end is connected with the second photoelectrical coupler (U2) the first pin U21, the second photoelectrical coupler (U2) the 4th pin U24 is electrically connected to the leakage current display circuit module, the first pin U11 of the first photoelectrical coupler (U1) is electrically connected to the channel selecting control module, the first photoelectrical coupler (U1) the second pin U12, three-prong U13 altogether, the 5th pin U15 of the first photoelectrical coupler (U1) is connected with relay (J1) three-prong J13, relay (J1) the 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, emitter follower the 5th divider resistance (R5), after emitter follower the 6th divider resistance (R6) connects, be connected with these two divider resistances of electric-leakage detection circuit module the again junction of an end of relay (J1) the 4th pin J14 is connected, the first resistance (R1) is connected with relay (J1) the second pin J12, the first resistance (R1) respectively with electric capacity (C1), the metal probe layer (Ta) of probe (T1) connects, electric capacity (C1) other end is connected with the second resistance (R2), the silver coating layer (Tb) of the second resistance (R2) other end and probe is ground connection simultaneously, 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 is connected, 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 the second photoelectrical coupler (U2), the 4th pin U24 of the second photoelectrical coupler (U2) is electrically connected to the leakage current display module, wherein the second photoelectrical coupler (U2) the first pin U21 is photoelectrical coupler the first pin, the first pin U21 of the second photoelectrical coupler (U2) is the light emitting diode input end, the second pin U22 of the second photoelectrical coupler (U2) is the light emitting diode output terminal, the 6th pin U26 of the second photoelectrical coupler (U2) is transistor base, the 5th pin U25 of the second photoelectrical coupler (U2) is transistor collector, the second photoelectrical coupler (U2) the 4th pin U24 is transistor emitter, the first photoelectrical coupler (U1) the first pin U11 is photoelectrical coupler the first pin, the first pin U11 of the first photoelectrical coupler (U1) is the light emitting diode input end, the second pin U12 of the first photoelectrical coupler (U1) is the light emitting diode output terminal, the 6th pin U16 of the first photoelectrical coupler (U1) is transistor base, the 5th pin U15 of the first photoelectrical coupler (U1) is transistor collector, the first photoelectrical coupler (U1) the 4th pin U14 is transistor emitter.
2. a kind of Intelligent detection circuit for electric leakage of network probe 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.
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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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| Application Number | Priority Date | Filing Date | Title |
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| CN201010567170XA CN102121959B (en) | 2010-11-30 | 2010-11-30 | Intelligent detection circuit for electric leakage of network probe |
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| CN102121959B true CN102121959B (en) | 2013-12-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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 |
-
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 |
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