CN102830369A - Method for identifying output fault of multi-way isolated intrinsic safety power supply - Google Patents
Method for identifying output fault of multi-way isolated intrinsic safety power supply Download PDFInfo
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- CN102830369A CN102830369A CN2012103096492A CN201210309649A CN102830369A CN 102830369 A CN102830369 A CN 102830369A CN 2012103096492 A CN2012103096492 A CN 2012103096492A CN 201210309649 A CN201210309649 A CN 201210309649A CN 102830369 A CN102830369 A CN 102830369A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 15
- 230000003287 optical effect Effects 0.000 abstract 3
- 239000003245 coal Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 238000002955 isolation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
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Abstract
The invention discloses a method for identifying an output fault of a multi-way isolated intrinsic safety power supply. The method comprises the following steps: each way of an output of the intrinsic safety power supply is connected to the input end of a light emitting diode of an optical coupler, a current value output by an emitter of each way of the optical coupler is controlled, a ratio of a current value of the back way to a current of the front way is at a fixed ratio k from the first way, so that the difference of each way of the power supply can be distinguished, and at last, the fault is identified through I/V conversion and collection of a voltage value through a single chip microcomputer; a voltage-stabilizing diode is connected between an anode of each way of the output of the isolated intrinsic safety power supply and the optical coupler in series, and the voltage value of the intrinsic safety power supply can be judged through a voltage-stabilizing property of the voltage-stabilizing diode. The method, provided by the invention, is suitable for fault detection and location selection of the intrinsic safety power supply for coal mine, and is safe, reliable and low in cost.
Description
Technical field
The present invention relates to a kind of method that multichannel is isolated intrinsically safe power supply output Fault Identification that is used for.
Background technology
Flourish along with the China's coal-mine cause, the colliery electrification more and more receives people's attention, the particular surroundings in colliery; Require electrical equipment in the hazardous environment that damps such as gas, coal dust are arranged, can use safely; And no matter any fault appears in equipment, the blast that any spark that equipment produces or any thermal effect all can not cause ambient gas, and this is the essential safe type circuit; As " the heart "-power supply of electrically energized machine, the most important thing that its design just designs for electrical equipment.
The withstand voltage requirement of 500V is arranged between the intrinsically safe power supply for the isolation under the China's coal-mine; At present the duty of multiple power supplies is carried out identification cost than higher; And circuit is complicated, and the method for the intrinsically safe power supply of multichannel isolation at present output fault is to adopt multiple power supplies to detect the method for multi pass acquisition.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of multichannel and isolate intrinsically safe power supply output fault recognition method.Safe and reliable and with low cost.
The objective of the invention is to realize through following technical scheme:
This multichannel is isolated intrinsically safe power supply output fault recognition method; Be that the light emitting diode input end that all inserts optocoupler is exported on each road that will isolate intrinsically safe power supply, control the current value of the emitter-base bandgap grading output of each road optocoupler again, begin from the first via; The current value on last road is a fixed ratio k with the ratio of the current value of back one tunnel; Distinguish the difference of every road power supply with this,, the collection of magnitude of voltage is realized Fault Identification through single-chip microcomputer at last through the I/V conversion; Isolate between positive pole and the optocoupler of each road output of intrinsically safe power supply all being connected in series a voltage stabilizing diode, judge through the stabilizing voltage characteristic of voltage stabilizing diode whether the intrinsically safe power supply magnitude of voltage is normal.
Further; The method that is used to control the emitter-base bandgap grading output current value of each road optocoupler is: serial connection one emitter resistance on the emitter-base bandgap grading output terminal of each road optocoupler; The emitter resistance value on last road is 1/k with the ratio of the emitter resistance value of back one tunnel; After the process of the electric current behind emitter resistance I/V conversion, accomplish the voltage acquisition on each road by single-chip microcomputer.
The invention has the beneficial effects as follows: the present invention is fit to the fault detect location of colliery intrinsically safe power supply and selects for use, and it is safe and reliable and with low cost.
Other advantages of the present invention, target and characteristic will be set forth in instructions subsequently to a certain extent; And to a certain extent; Based on being conspicuous to those skilled in the art, perhaps can from practice of the present invention, obtain instruction to investigating of hereinafter.Target of the present invention and other advantages can realize and obtain through following instructions and claims.
Description of drawings
In order to make the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that the present invention is made further detailed description below, wherein:
Accompanying drawing is a circuit connection structure synoptic diagram of the present invention.
Embodiment
Below will carry out detailed description to the preferred embodiments of the present invention with reference to accompanying drawing.Should be appreciated that preferred embodiment has been merely explanation the present invention, rather than in order to limit protection scope of the present invention.
Multichannel of the present invention is isolated intrinsically safe power supply output fault recognition method; Said method is each road output (i.e. V1+, V1-to Vn+, Vn-among the figure) of isolating intrinsically safe power supply all to be inserted the light emitting diode input end of optocoupler, controls the current value of the emitter-base bandgap grading output of each road optocoupler again, begins from the first via; The current value on last road is a fixed ratio k with the ratio of the current value of back one tunnel; Distinguish the difference of every road power supply with this,, the collection of magnitude of voltage is realized Fault Identification through single-chip microcomputer at last through the I/V conversion; Its concrete recognition methods is: the emitter-base bandgap grading output current value of controlling each road optocoupler; Promptly on the emitter-base bandgap grading output terminal of each road optocoupler, be connected in series an emitter resistance, the emitter resistance value on last road is 1/k with the ratio of the emitter resistance value of back one tunnel, and k is 2 integral multiple; The current collection of optocoupler is fixed voltage value input (being 5v in the present embodiment) very; After the process of the electric current behind emitter resistance I/V conversion, accomplish the voltage acquisition on each road by single-chip microcomputer, because the ratio relation between the emitter resistance value; The voltage on each road that therefore collects also demonstrates corresponding ratio relation according to correspondence; Convert the levels characteristic under its normal condition the array mode of 2 systems to, the 2 system state values that the numerical value that collects through single-chip microcomputer is corresponding with it compare, thereby whether identification power supply output fault takes place and power supply output fault takes place for which.
Isolate between positive pole and the optocoupler of each road output of intrinsically safe power supply and all be connected in series a voltage stabilizing diode; Judge through the stabilizing voltage characteristic of voltage stabilizing diode whether the intrinsically safe power supply magnitude of voltage is normal; Specifically: voltage stabilizing diode is in cut-off state when undesired when power supply is exported; When power supply output voltage stabilizing diode conducting just often, judge with conducting state whether supply voltage value is normal through ending of voltage stabilizing diode like this.
As shown in the figure; Isolate the output that intrinsically safe power supply has comprised the 1 tunnel ~ the n road; Whenever including a voltage stabilizing diode on the way (is that ZD1 ~ ZDn), an optocoupler (are that U1 ~ Un), a build-out resistor (are R1 ~ Rn) and an emitter resistance (R11 ~ Rnn); Wherein the cathode output end on each road all is connected to the negative pole of voltage stabilizing diode, and the cathode output end on each road all is attached to a build-out resistor, and the positive pole of voltage stabilizing diode is attached to the positive pole of the light emitting diode of this road optocoupler; The other end of build-out resistor is attached to the negative pole of the light emitting diode of this road optocoupler, and the emitter-base bandgap grading output terminal of optocoupler is attached to emitter resistance.In the present embodiment, k gets 2, so when R11 got 1k, R22 was 2k, during to Rnn, is 2 (n-1) k.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the aim and the scope of present technique scheme, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1. multichannel is isolated intrinsically safe power supply output fault recognition method; It is characterized in that: said method is each road output of isolating intrinsically safe power supply all to be inserted the light emitting diode input end of optocoupler; Control the current value of the emitter-base bandgap grading output of each road optocoupler again, begin from the first via, the current value on last road is a fixed ratio k with the ratio of the current value of back one tunnel; K is 2 integral multiple; Distinguish the difference of every road power supply with this,, the collection of magnitude of voltage is realized Fault Identification through single-chip microcomputer at last through the I/V conversion; Isolate between positive pole and the optocoupler of each road output of intrinsically safe power supply all being connected in series a voltage stabilizing diode, judge through the stabilizing voltage characteristic of voltage stabilizing diode whether the intrinsically safe power supply magnitude of voltage is normal.
2. multichannel according to claim 1 is isolated intrinsically safe power supply output fault recognition method; It is characterized in that: the method that is used to control the emitter-base bandgap grading output current value of each road optocoupler is: serial connection one emitter resistance on the emitter-base bandgap grading output terminal of each road optocoupler; The emitter resistance value on last road is 1/k with the ratio of the emitter resistance value of back one tunnel; K is 2 integral multiple, after the process of the electric current behind emitter resistance I/V conversion, is accomplished the voltage acquisition on each road by single-chip microcomputer.
3. multichannel according to claim 1 is isolated intrinsically safe power supply output fault recognition method, and it is characterized in that: said k is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210309649.2A CN102830369B (en) | 2012-08-28 | 2012-08-28 | Method for identifying output fault of multi-path isolation intrinsic safety type power supply |
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| CN201210309649.2A CN102830369B (en) | 2012-08-28 | 2012-08-28 | Method for identifying output fault of multi-path isolation intrinsic safety type power supply |
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| CN102830369A true CN102830369A (en) | 2012-12-19 |
| CN102830369B CN102830369B (en) | 2015-08-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884554A (en) * | 2019-04-01 | 2019-06-14 | 上海移为通信技术股份有限公司 | A kind of LED light automatic recognition system and method applied to production line |
| CN112269083A (en) * | 2020-10-20 | 2021-01-26 | 江苏新安电器股份有限公司 | Control panel voltage detection and conversion device for automatic test equipment |
| CN117394846A (en) * | 2023-12-13 | 2024-01-12 | 常州市索鼎自动化科技有限公司 | Isolation device for intrinsically safe devices |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109753101A (en) * | 2017-11-03 | 2019-05-14 | 北京航天万源科技有限公司 | A kind of multi-computer Redundancy power-supply system is distant to adopt voltage regulator circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005300376A (en) * | 2004-04-13 | 2005-10-27 | Matsushita Electric Ind Co Ltd | Voltage detection circuit, power supply device and semiconductor device |
| CN201773173U (en) * | 2010-06-24 | 2011-03-23 | 贠国保 | Multi-way switching value detection circuit |
| CN102769393A (en) * | 2012-07-30 | 2012-11-07 | 中煤科工集团重庆研究院 | Method for realizing high loading capacity by integrating inputs of a plurality of intrinsically safe power supplies |
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- 2012-08-28 CN CN201210309649.2A patent/CN102830369B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005300376A (en) * | 2004-04-13 | 2005-10-27 | Matsushita Electric Ind Co Ltd | Voltage detection circuit, power supply device and semiconductor device |
| CN201773173U (en) * | 2010-06-24 | 2011-03-23 | 贠国保 | Multi-way switching value detection circuit |
| CN102769393A (en) * | 2012-07-30 | 2012-11-07 | 中煤科工集团重庆研究院 | Method for realizing high loading capacity by integrating inputs of a plurality of intrinsically safe power supplies |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884554A (en) * | 2019-04-01 | 2019-06-14 | 上海移为通信技术股份有限公司 | A kind of LED light automatic recognition system and method applied to production line |
| CN112269083A (en) * | 2020-10-20 | 2021-01-26 | 江苏新安电器股份有限公司 | Control panel voltage detection and conversion device for automatic test equipment |
| CN117394846A (en) * | 2023-12-13 | 2024-01-12 | 常州市索鼎自动化科技有限公司 | Isolation device for intrinsically safe devices |
| CN117394846B (en) * | 2023-12-13 | 2024-02-27 | 常州市索鼎自动化科技有限公司 | Isolation device for intrinsically safe devices |
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| CN102830369B (en) | 2015-08-26 |
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Address after: 400039 Chongqing Jiulongpo Branch City Road No. 6 Applicant after: Chongqing Research Institute of China Coal Technology & Engineering Group Corp. Address before: 400037, No. three village, 55 bridge, Shapingba District, Chongqing Applicant before: Chongqing Research Institute of China Coal Technology & Engineering Group Corp. |
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Address after: 400039 Chongqing Jiulongpo Branch City Road No. 6 Applicant after: CCTEG CHONGQING RESEARCH INSTITUTE Co.,Ltd. Address before: 400039 Chongqing Jiulongpo Branch City Road No. 6 Applicant before: Chongqing Research Institute of China Coal Technology & Engineering Group Corp. |
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