CN102621440A - Detection signal input circuit of on-line leakage monitoring module for mine - Google Patents
Detection signal input circuit of on-line leakage monitoring module for mine Download PDFInfo
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- CN102621440A CN102621440A CN2012100988394A CN201210098839A CN102621440A CN 102621440 A CN102621440 A CN 102621440A CN 2012100988394 A CN2012100988394 A CN 2012100988394A CN 201210098839 A CN201210098839 A CN 201210098839A CN 102621440 A CN102621440 A CN 102621440A
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Abstract
The invention discloses a detection signal input circuit of an on-line leakage monitoring module for mine, belongs to the technical field of an on-line leakage monitoring circuit for mine, and aims at providing a detection signal input circuit of an underground on-line leakage monitoring module of 3300V voltage level in a coal mine. The technical scheme is as follows: the other end of a resistor R10 is connected with a resistor R17 in series and then is connected with the signal output end 2.4 of the detection signal input circuit; the other end of a resistor R2 is sequentially connected with a resistor R3, a resistor R4, a resistor R5 and a resistor R6 in series and then is connected with the detection signal input end positive electrode 2.5 of the detection signal input circuit; the other end of the resistor R2 is connected with one end of a resistor R22; and the other end of the resistor R22 is connected with one end of a resistor R15, one end of a capacitor C4, and one end of a capacitor C5 in parallel, and then is connected with the detection signal input end negative electrode 2.6 of the detection signal input circuit. The detection signal input circuit is suitable for the field of coal mine.
Description
Technical field
The present invention is mining online leakage current detect module detection signal input circuit belongs to mining online leakage current detect circuit engineering field.
Background technology
Safety all is first requirement for any industrial environment, for the subsurface environment of colliery, and gas, coal dust, fire, water, roof pressure, dynamo-electric accident is topmost six major break down reasons; And for these accidents, except water and roof pressure, dynamo-electric accident, first three items is the most dangerous, all can cause the explosion of coal mines accident, and its reason all causes owing to electric spark; And because the caused electric spark of electric leakage accounts for very big ratio; And for personal security, because the working environment of down-hole is special, the space is narrow and small, humidity, and vibration is big, and high humidity is very easy to cause casualties because of electric leakage.
For the generation root and the injury of electric leakage that prevents electric spark to operating personnel; Supply transformer neutral point under the national regulation coal mine can not ground connection; The powered operation mode of our said isolated neutral just, and industry, folk power supply mode are generally the transformer neutral point direct grounding way on the ground, on the other hand; Because the power supply voltage level under the coal mine is 1140V and 3300V; This special power supply mode in colliery and electric pressure have determined mining electric product and general industry occasion not general, and function is special, along with improving constantly of China's coal mines per-well production; The electric pressure of original 1140V can not satisfy the needs of the high-yield and high-efficiency in colliery; Power supply voltage level all need be to transition of 3300V electric pressure and transformation, and domestic development for the electrical equipment under the 3300V electric pressure at present is in the incipient stage basically; Need the problem of solution also a lot, particularly the online leakage current detect of the electric wiring under the coal mine and line security control problem are badly in need of solving.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, and technical matters to be solved is: a kind of detection signal input circuit that is used for the online leakage current detect module of 3300V electric pressure under the coal mine is provided.
For solving the problems of the technologies described above; The technical scheme that the present invention adopted is: mining online leakage current detect module detection signal input circuit; Link to each other with the power end anodal 2.1 of detection signal input circuit behind one end of the negative pole of one end of resistance R 7 and the end of connecting resistance R11, diode D2, an end of resistance R 10 and resistance R 2; The other end of said resistance R 11 links to each other with an end of capacitor C 8; Link to each other with the feedback end 2.2 of detection signal input circuit behind the end of the anodal and connecting resistance R13 of diode D2; Link to each other with the stiff end of slide rheostat R19 behind the other end series resistor R14 of resistance R 13, the other end of said resistance R 7 and connect the end of another stiff end and resistance R 20 of sliding end, slide rheostat R19 of the other end, the slide rheostat R19 of capacitor C 8 after link to each other with the power end negative pole 2.3 of detection signal input circuit;
Link to each other with the signal output part 2.4 of detection signal input circuit behind the other end series resistor R17 of said resistance R 10;
The other end of said resistance R 2 series resistor R3, resistance R 4, resistance R 5 and resistance R 6 backs successively links to each other with the detection signal input anode 2.5 of detection signal input circuit; The other end of said resistance R 20 links to each other with an end of resistance R 22, links to each other with the detection signal input cathode 2.6 of detection signal input circuit behind the end of the end of the other end of resistance R 22 and connecting resistance R15, an end of capacitor C 4 and capacitor C 5;
The other end of resistance R 15 series resistor R18 and capacitor C 1 back successively links to each other with line between resistance R 2 and the resistance R 3; The other end of capacitor C 4 links to each other with line between resistance R 3 and the resistance R 4; The other end of capacitor C 5 links to each other with line between resistance R 5 and the resistance R 6; One end of capacitor C 2 and capacitor C 1 link to each other with line between the resistance R 18, and the other end of capacitor C 2 links to each other with line between resistance R 4 and the resistance R 5.
The beneficial effect that the present invention compared with prior art has is: the present invention directly links to each other with the detection of electrical leakage port, is injected in the system under test (SUT) by a constant voltage signal through power port, through feedback, the sampling to the constant voltage signal; Obtain and a measured proportional electric signal; And this signal is transferred in the electric-leakage detection circuit, can realize collection to the online detection of electrical leakage signal of 3300V electric pressure circuit, precision is high; Response time is fast, for detection of electrical leakage provides the foundation.
Description of drawings
Do further detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
Fig. 1 is an electrical block diagram of the present invention.
Fig. 2 is an application circuit structural representation of the present invention.
Embodiment
As shown in Figure 1; The present invention is mining online leakage current detect module detection signal input circuit; Link to each other with the power end anodal 2.1 of detection signal input circuit behind one end of the negative pole of one end of resistance R 7 and the end of connecting resistance R11, diode D2, an end of resistance R 10 and resistance R 2; The other end of said resistance R 11 links to each other with an end of capacitor C 8; Link to each other with the feedback end 2.2 of detection signal input circuit behind the end of the anodal and connecting resistance R13 of diode D2; Link to each other with the stiff end of slide rheostat R19 behind the other end series resistor R14 of resistance R 13, the other end of said resistance R 7 and connect the end of another stiff end and resistance R 20 of sliding end, slide rheostat R19 of the other end, the slide rheostat R19 of capacitor C 8 after link to each other with the power end negative pole 2.3 of detection signal input circuit.
Link to each other with the signal output part 2.4 of detection signal input circuit behind the other end series resistor R17 of said resistance R 10; The electric signal of signal output part 2.4 outputs is and a measured proportional electric signal to send it in the electric-leakage detection circuit through signal output part 2.4.
The other end of said resistance R 2 series resistor R3, resistance R 4, resistance R 5 and resistance R 6 backs successively links to each other with the detection signal input anode 2.5 of detection signal input circuit; The other end of said resistance R 20 links to each other with an end of resistance R 22, links to each other with the detection signal input cathode 2.6 of detection signal input circuit behind the end of the end of the other end of resistance R 22 and connecting resistance R15, an end of capacitor C 4 and capacitor C 5; As shown in Figure 2, in practical application, can form an asterism through three-phase or two phase reactors, more above-mentioned detection signal input anode 2.5 and detection signal input cathode 2.6 are gone into as one group of termination to be detected in this asterism and ground.
The other end of resistance R 15 series resistor R18 and capacitor C 1 back successively links to each other with line between resistance R 2 and the resistance R 3; The other end of capacitor C 4 links to each other with line between resistance R 3 and the resistance R 4; The other end of capacitor C 5 links to each other with line between resistance R 5 and the resistance R 6; One end of capacitor C 2 and capacitor C 1 link to each other with line between the resistance R 18, and the other end of capacitor C 2 links to each other with line between resistance R 4 and the resistance R 5; Above-mentioned resistance R 3, resistance R 4, resistance R 5 all adopt the resistance of 22k Ω, can realize the electric leakage signal collection to 3300V electric pressure circuit.
The present invention directly links to each other with the detection of electrical leakage port, is injected in the system under test (SUT) by a constant voltage signal through power port, through feedback, the sampling to the constant voltage signal; Obtain and a measured proportional electric signal; And this signal is transferred in the electric-leakage detection circuit, can realize collection to the online detection of electrical leakage signal of 3300V electric pressure circuit, precision is high; Response time is fast, for detection of electrical leakage provides the foundation.
Claims (1)
1. mining online leakage current detect module detection signal input circuit; It is characterized in that: link to each other with the power end anodal 2.1 of detection signal input circuit behind the end of the negative pole of an end of resistance R 7 and the end of connecting resistance R11, diode D2, an end of resistance R 10 and resistance R 2; The other end of said resistance R 11 links to each other with an end of capacitor C 8; Link to each other with the feedback end 2.2 of detection signal input circuit behind the end of the anodal and connecting resistance R13 of diode D2; Link to each other with the stiff end of slide rheostat R19 behind the other end series resistor R14 of resistance R 13, the other end of said resistance R 7 and connect the end of another stiff end and resistance R 20 of sliding end, slide rheostat R19 of the other end, the slide rheostat R19 of capacitor C 8 after link to each other with the power end negative pole 2.3 of detection signal input circuit;
Link to each other with the signal output part 2.4 of detection signal input circuit behind the other end series resistor R17 of said resistance R 10;
The other end of said resistance R 2 series resistor R3, resistance R 4, resistance R 5 and resistance R 6 backs successively links to each other with the detection signal input anode 2.5 of detection signal input circuit; The other end of said resistance R 20 links to each other with an end of resistance R 22, links to each other with the detection signal input cathode 2.6 of detection signal input circuit behind the end of the end of the other end of resistance R 22 and connecting resistance R15, an end of capacitor C 4 and capacitor C 5;
The other end of resistance R 15 series resistor R18 and capacitor C 1 back successively links to each other with line between resistance R 2 and the resistance R 3; The other end of capacitor C 4 links to each other with line between resistance R 3 and the resistance R 4; The other end of capacitor C 5 links to each other with line between resistance R 5 and the resistance R 6; One end of capacitor C 2 and capacitor C 1 link to each other with line between the resistance R 18, and the other end of capacitor C 2 links to each other with line between resistance R 4 and the resistance R 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210098839.4A CN102621440B (en) | 2012-04-06 | 2012-04-06 | Detection signal input circuit of on-line leakage monitoring module for mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210098839.4A CN102621440B (en) | 2012-04-06 | 2012-04-06 | Detection signal input circuit of on-line leakage monitoring module for mine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102621440A true CN102621440A (en) | 2012-08-01 |
| CN102621440B CN102621440B (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210098839.4A Expired - Fee Related CN102621440B (en) | 2012-04-06 | 2012-04-06 | Detection signal input circuit of on-line leakage monitoring module for mine |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5514967A (en) * | 1994-08-16 | 1996-05-07 | Zelm; Richard J. | Automatic insulation test equipment for testing high voltage electrical equipment at the rated voltage level |
| JP2002112449A (en) * | 2000-09-28 | 2002-04-12 | Hikari Shoko Kk | Method and apparatus for detecting and protecting from leak of low voltage ground line |
| US20050280422A1 (en) * | 2004-06-18 | 2005-12-22 | Kokusan Denki Co., Ltd. | Electric leakage detection system |
| CN202614883U (en) * | 2012-04-06 | 2012-12-19 | 刘涛 | Detection signal input circuit for mining on-line electric-leakage monitoring module |
-
2012
- 2012-04-06 CN CN201210098839.4A patent/CN102621440B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5514967A (en) * | 1994-08-16 | 1996-05-07 | Zelm; Richard J. | Automatic insulation test equipment for testing high voltage electrical equipment at the rated voltage level |
| JP2002112449A (en) * | 2000-09-28 | 2002-04-12 | Hikari Shoko Kk | Method and apparatus for detecting and protecting from leak of low voltage ground line |
| US20050280422A1 (en) * | 2004-06-18 | 2005-12-22 | Kokusan Denki Co., Ltd. | Electric leakage detection system |
| CN202614883U (en) * | 2012-04-06 | 2012-12-19 | 刘涛 | Detection signal input circuit for mining on-line electric-leakage monitoring module |
Non-Patent Citations (2)
| Title |
|---|
| 王德胜: "附加直流电源检测法在漏电保护中的应用", 《工矿自动化》 * |
| 高赟: "一种附加直流电源漏电保护器的研制", 《工矿自动化》 * |
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| CN102621440B (en) | 2014-10-15 |
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Granted publication date: 20141015 Termination date: 20210406 |