CN102608487B - Logic judgement circuit for mine on-line leakage monitoring modules - Google Patents
Logic judgement circuit for mine on-line leakage monitoring modules Download PDFInfo
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- CN102608487B CN102608487B CN201210098825.2A CN201210098825A CN102608487B CN 102608487 B CN102608487 B CN 102608487B CN 201210098825 A CN201210098825 A CN 201210098825A CN 102608487 B CN102608487 B CN 102608487B
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Abstract
The invention relates to a logic judgement circuit for mine on-line leakage monitoring modules, which belongs to the technical field of mine on-line leakage monitoring circuits. The technical problem to be solved is to provide the logic judgement circuit for underground 3300V voltage-class on-line leakage monitoring modules for coal mines. In the adopted technical scheme, one end of a resistor R40 is connected in parallel with one end of a capacitor C25 and one end of a resistor R61 and then connected with the signal input end 4.2 of the logic judgement circuit, one end of a capacitor C24 is connected in parallel with the cathode of an adjustable Zener diode U9 and one end of a resistor R59 and then connected with the signal input end 4.1 of the logic judgement circuit, the pin 4 of an LM2902N chip U7 is connected with the power input end 4.3 of the logic judgement circuit, the other end of a resistor R60 is the signal output end 4.4 of the logic judgement circuit, the other end of a resistor R36 is the signal output end 4.6 of the logic judgement circuit, and the other end of a resistor R47 is the signal output end 4.5 of the logic judgement circuit. The logic judgement circuit is applicable to the field of coal mines.
Description
Technical field
Online leakage current detect module logic decision circuitry that the present invention is mining, belongs to mining online electric leakage monitoring circuit technical field.
Background technology
Safety is all first requirement for any industrial environment, for underground coal mine environment, and gas, coal dust, fire, water, roof pressure, Electromechanical Accidents is topmost six major break down reasons; And for these accidents, except water and roof pressure, Electromechanical Accidents, first three items is the most dangerous, all can cause explosion of coal mines accident, and its reason is all because electric spark causes; And account for very large ratio due to the caused electric spark that leaks electricity; And for personal security, because the working environment of down-hole is special, narrow space, moist, vibration is large, high humidity, is very easy to cause casualties because of electric leakage.
In order to prevent the generation root of electric spark and the injury of electric leakage to operating personnel, the supply transformer neutral point of national regulation underground coal mine can not ground connection, the namely powered operation mode of our said isolated neutral, and industry on ground, folk power supply mode is generally transformer neutral point direct grounding way, on the other hand, power supply voltage level due to underground coal mine is 1140V and 3300V, this special power supply mode in colliery and electric pressure determine mining electric product and general industry occasion is 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 meet the needs of the high-yield and high-efficiency in colliery, power supply voltage level all needs to the transition of 3300V electric pressure and transformation, the domestic development for the electrical equipment under 3300V electric pressure at present, substantially the incipient stage is in, need the problem of solution also a lot, particularly the online leakage current detect of the electric wiring of underground 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: the logic judging circuit providing a kind of online leakage current detect module for underground coal mine 3300V electric pressure.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: mining online leakage current detect module logic decision circuitry, be connected with the signal input part 4.2 of logic judging circuit behind one end of one end shunt-wound capacitance C25 of resistance R40 and one end of resistance R61, the other end of described resistance R40 is connected with 10 pin of LM2902N chip U7; One end of electric capacity C24 is also connected with the signal input part 4.1 of logic judging circuit after connecing one end of the negative pole of adjustable voltage stabilizing diode U9, resistance R59; The other end of described resistance R59 is also connected with the control end of adjustable voltage stabilizing diode U9 behind one end of connecting resistance R62.
8 pin of described LM2902N chip U7 are connected with 9 pin, resistance R46 is serially connected with between 8 pin of LM2902N chip U7 and 3 pin, be serially connected with resistance R21 between 1 pin of LM2902N chip U7 and 5 pin, 2 pin of LM2902N chip U7 one end of connecting resistance R57 are connected with one end of resistance R65 with behind one end of electric capacity C20; The other end of described resistance R57 is connected with a stiff end of slide rheostat resistance R55, the other end of electric capacity C20 the sliding end meeting slide rheostat R55 are connected with one end of resistance R43 with after another stiff end, and the other end of resistance R43 is connected with 12 pin of LM2902N chip U7.
Described 4 pin of LM2902N chip U7 are connected with the power input 4.3 of logic judging circuit, one end of the 6 pin shunt-wound capacitance C23 of LM2902N chip U7 is connected with one end of resistance R34 with behind one end of resistance R39, the other end of the 7 pin shunt-wound capacitance C23 of LM2902N chip U7 is connected with one end of resistance R60 with after the other end of resistance R39, and the other end of described resistance R60 is the signal output part 4.4 of logic judging circuit.
One end of the 13 pin shunt-wound capacitance C21 of described LM2902N chip U7 is connected with one end of resistance R66 with behind one end of resistance R58, the other end of electric capacity C21 is also connected with one end of resistance R36 after the other end of connecting resistance R58, and the other end of described resistance R36 is the signal output part 4.6 of logic judging circuit; 14 pin of LM2902N chip U7 are connected with one end of resistance R47, and the other end of described resistance R47 is the signal output part 4.5 of logic judging circuit.
The other end of described electric capacity C25, the equal ground connection of 11 pin of the other end of the positive pole of the other end of resistance R61, the other end of electric capacity C24, adjustable voltage stabilizing diode U9, the other end of resistance R62, resistance R65, the other end of resistance R34, the other end of resistance R66 and LM2902N chip U7.
The beneficial effect that the present invention compared with prior art has is: the present invention is provided with multiple signals output port, the input signal driven can be exported as upper location supervisory and relay, realize the real-time monitoring to 3300V electric pressure circuit and the timely process to circuit abnormality situation, guarantee electric wiring safety; Whole circuit structure is simple, and components and parts low price, cost is lower.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, specific embodiments of the present invention are further described in detail:
Fig. 1 is electrical block diagram of the present invention.
Embodiment
As shown in Figure 1, online leakage current detect module logic decision circuitry that the present invention is mining, be connected with the signal input part 4.2 of logic judging circuit behind one end of one end shunt-wound capacitance C25 of resistance R40 and one end of resistance R61, the other end of described resistance R40 is connected with 10 pin of LM2902N chip U7; One end of electric capacity C24 is also connected with the signal input part 4.1 of logic judging circuit after connecing one end of the negative pole of adjustable voltage stabilizing diode U9, resistance R59; The other end of described resistance R59 is also connected with the control end of adjustable voltage stabilizing diode U9 behind one end of connecting resistance R62.
8 pin of described LM2902N chip U7 are connected with 9 pin, resistance R46 is serially connected with between 8 pin of LM2902N chip U7 and 3 pin, be serially connected with resistance R21 between 1 pin of LM2902N chip U7 and 5 pin, 2 pin of LM2902N chip U7 one end of connecting resistance R57 are connected with one end of resistance R65 with behind one end of electric capacity C20; The other end of described resistance R57 is connected with a stiff end of slide rheostat resistance R55, the other end of electric capacity C20 the sliding end meeting slide rheostat R55 are connected with one end of resistance R43 with after another stiff end, and the other end of resistance R43 is connected with 12 pin of LM2902N chip U7.
Described 4 pin of LM2902N chip U7 are connected with the power input 4.3 of logic judging circuit, one end of the 6 pin shunt-wound capacitance C23 of LM2902N chip U7 is connected with one end of resistance R34 with behind one end of resistance R39, the other end of the 7 pin shunt-wound capacitance C23 of LM2902N chip U7 is connected with one end of resistance R60 with after the other end of resistance R39, and the other end of described resistance R60 is the signal output part 4.4 of logic judging circuit.
One end of the 13 pin shunt-wound capacitance C21 of described LM2902N chip U7 is connected with one end of resistance R66 with behind one end of resistance R58, the other end of electric capacity C21 is also connected with one end of resistance R36 after the other end of connecting resistance R58, and the other end of described resistance R36 is the signal output part 4.6 of logic judging circuit; 14 pin of LM2902N chip U7 are connected with one end of resistance R47, and the other end of described resistance R47 is the signal output part 4.5 of logic judging circuit.
The other end of described electric capacity C25 ground connection after 11 pin of the other end of the other end of the positive pole of the other end of the other end of connecting resistance R61, electric capacity C24, adjustable voltage stabilizing diode U9, resistance R62, resistance R65, the other end of resistance R34, the other end of resistance R66 and LM2902N chip U7.
The input voltage of the power input 4.3 of online leakage current detect module logic decision circuitry that the present invention is mining is+12V, logic judging circuit obtains input signal by signal input part 4.1,4.2, after signal is processed, signal is outputted to upper location supervisory by signal output part 4.4, signal output part 4.5,4.6 transfers signals to relay output driving circuit, realize the Real-time Monitor Management to abnormal signal, ensure electric wiring safety.
Claims (1)
1. mining online leakage current detect module logic decision circuitry, it is characterized in that: be connected with the signal input part 4.2 of logic judging circuit behind one end of one end shunt-wound capacitance C25 of resistance R40 and one end of resistance R61, the other end of described resistance R40 is connected with 10 pin of LM2902N chip U7; One end of electric capacity C24 is also connected with the signal input part 4.1 of logic judging circuit after connecing one end of the negative pole of adjustable voltage stabilizing diode U9, resistance R59; The other end of described resistance R59 is also connected with the control end of adjustable voltage stabilizing diode U9 behind one end of connecting resistance R62;
8 pin of described LM2902N chip U7 are connected with 9 pin, resistance R46 is serially connected with between 8 pin of LM2902N chip U7 and 3 pin, be serially connected with resistance R21 between 1 pin of LM2902N chip U7 and 5 pin, 2 pin of LM2902N chip U7 one end of connecting resistance R57 are connected with one end of resistance R65 with behind one end of electric capacity C20; The other end of described resistance R57 is connected with a stiff end of slide rheostat resistance R55, the other end of electric capacity C20 the sliding end meeting slide rheostat R55 are connected with one end of resistance R43 with after another stiff end, and the other end of resistance R43 is connected with 12 pin of LM2902N chip U7;
Described 4 pin of LM2902N chip U7 are connected with the power input 4.3 of logic judging circuit, one end of the 6 pin shunt-wound capacitance C23 of LM2902N chip U7 is connected with one end of resistance R34 with behind one end of resistance R39, the other end of the 7 pin shunt-wound capacitance C23 of LM2902N chip U7 is connected with one end of resistance R60 with after the other end of resistance R39, and the other end of described resistance R60 is the signal output part 4.4 of logic judging circuit;
One end of the 13 pin shunt-wound capacitance C21 of described LM2902N chip U7 is connected with one end of resistance R66 with behind one end of resistance R58, the other end of electric capacity C21 is also connected with one end of resistance R36 after the other end of connecting resistance R58, and the other end of described resistance R36 is the signal output part 4.6 of logic judging circuit; 14 pin of LM2902N chip U7 are connected with one end of resistance R47, and the other end of described resistance R47 is the signal output part 4.5 of logic judging circuit;
The other end of described electric capacity C25, the equal ground connection of 11 pin of the other end of the positive pole of the other end of resistance R61, the other end of electric capacity C24, adjustable voltage stabilizing diode U9, the other end of resistance R62, resistance R65, the other end of resistance R34, the other end of resistance R66 and LM2902N chip U7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210098825.2A CN102608487B (en) | 2012-04-06 | 2012-04-06 | Logic judgement circuit for mine on-line leakage monitoring modules |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210098825.2A CN102608487B (en) | 2012-04-06 | 2012-04-06 | Logic judgement circuit for mine on-line leakage monitoring modules |
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| CN102608487A CN102608487A (en) | 2012-07-25 |
| CN102608487B true CN102608487B (en) | 2014-12-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87209522U (en) * | 1987-06-22 | 1988-06-22 | 邱银华 | Detector for electrical leakage protector |
| CN1794530A (en) * | 2005-12-21 | 2006-06-28 | 淄博卓尔电器有限公司 | Method of eliminating error action of leakage protector lower and circuit at operating state |
| CN201336552Y (en) * | 2009-01-05 | 2009-10-28 | 济源市科灵电器有限责任公司 | Coal-mining earth-leakage protection device with high-voltage selectivity |
| CN202548262U (en) * | 2012-04-06 | 2012-11-21 | 刘涛 | Logic judgment circuit of online electricity leakage monitoring module for mine |
-
2012
- 2012-04-06 CN CN201210098825.2A patent/CN102608487B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87209522U (en) * | 1987-06-22 | 1988-06-22 | 邱银华 | Detector for electrical leakage protector |
| CN1794530A (en) * | 2005-12-21 | 2006-06-28 | 淄博卓尔电器有限公司 | Method of eliminating error action of leakage protector lower and circuit at operating state |
| CN201336552Y (en) * | 2009-01-05 | 2009-10-28 | 济源市科灵电器有限责任公司 | Coal-mining earth-leakage protection device with high-voltage selectivity |
| CN202548262U (en) * | 2012-04-06 | 2012-11-21 | 刘涛 | Logic judgment circuit of online electricity leakage monitoring module for mine |
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| CN102608487A (en) | 2012-07-25 |
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