CN102830369B - Method for identifying output fault of multi-path isolation intrinsic safety type power supply - Google Patents
Method for identifying output fault of multi-path isolation intrinsic safety type power supply Download PDFInfo
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- CN102830369B CN102830369B CN201210309649.2A CN201210309649A CN102830369B CN 102830369 B CN102830369 B CN 102830369B CN 201210309649 A CN201210309649 A CN 201210309649A CN 102830369 B CN102830369 B CN 102830369B
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Abstract
The invention discloses a method for identifying a fault of multi-path isolated intrinsically safe power output, which comprises the steps of connecting each path of output of an isolated intrinsically safe power to the input end of a light emitting diode of an optical coupler, controlling the current value of the emitter output of each path of optical coupler, wherein the ratio of the current value of the next path to the current value of the previous path from the first path is a fixed ratio k so as to distinguish the difference of each path of power, and finally realizing fault identification by collecting a voltage value through a single chip microcomputer through I/V conversion; a voltage stabilizing diode is connected in series between the positive electrode of each output path of the isolated intrinsic safety power supply and the optocoupler, and whether the voltage value of the intrinsic safety power supply is normal or not is judged according to the voltage stabilizing characteristic of the voltage stabilizing diode. The invention is suitable for fault detection and positioning of the intrinsically safe power supply of the coal mine, and is safe, reliable and low in cost.
Description
Technical field
The present invention relates to a kind of method exporting Fault Identification for multichannel isolation intrinsically safe power supply.
Background technology
Flourish along with China's coal-mine cause, colliery electrification is more and more subject to people's attention, the particular surroundings in colliery, require that electrical equipment can be used safely in the hazardous environment having the damp such as gas, coal dust, and no matter any fault appears in equipment, any spark that equipment produces or any thermal effect all can not cause the blast of ambient gas, and this is essence safety type circuits, as " the heart "-power supply of electrically energized machine, the most important thing of its design with regard to designing for electrical equipment.
The requirement having 500V withstand voltage between the intrinsically safe power supply for the isolation under China's coal-mine, at present identification cost compare carries out to the duty of multiple power supplies high, and circuit is more complicated, the defeated out of order method of current multichannel isolation intrinsically safe power supply is the method adopting multiple power supplies to detect multi pass acquisition.
Summary of the invention
In view of this, the object of this invention is to provide a kind of multichannel isolation intrinsically safe power supply and export fault recognition method.Safe and reliable and with low cost.
The object of the invention is to be achieved through the following technical solutions:
This multichannel isolation intrinsically safe power supply exports fault recognition method, that each road of isolation intrinsically safe power supply is exported the light emitting diode input end all accessing optocoupler, the current value that the emitter-base bandgap grading controlling each road optocoupler again exports, from the first via, the ratio of the current value on current value Yu Hou mono-tunnel on last road is a fixed ratio k, distinguish the difference of every road power supply with this, finally by I/V conversion, realize Fault Identification by the collection of single-chip microcomputer to magnitude of voltage; The positive pole that each road of isolation intrinsically safe power supply exports all is connected in series a voltage stabilizing diode with between optocoupler, judges that whether intrinsically safe power supply magnitude of voltage is normal by the stabilizing voltage characteristic of voltage stabilizing diode.
Further, for controlling the method for the emitter-base bandgap grading output current value of each road optocoupler be: on the emitter-base bandgap grading output terminal of each road optocoupler, be connected in series an emitter resistance, the ratio of the emitter resistance value on emitter resistance value Yu Hou mono-tunnel on last road is 1/k, by the electric current after emitter resistance after I/V conversion, completed the voltage acquisition on each road by single-chip microcomputer.
The invention has the beneficial effects as follows: the fault detect location that the present invention is applicable to colliery intrinsically safe power supply is selected, and it is safe and reliable and with low cost.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or can be instructed from the practice of the present invention.Target of the present invention and other advantages can be realized by instructions below and claims and be obtained.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Accompanying drawing is circuit connection structure schematic diagram of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.Should be appreciated that preferred embodiment only in order to the present invention is described, instead of in order to limit the scope of the invention.
Multichannel isolation intrinsically safe power supply of the present invention exports fault recognition method, described method is that each road of isolation intrinsically safe power supply is exported (the V1+ namely in figure, V1-to Vn+, Vn-) the light emitting diode input end of optocoupler is all accessed, the current value that the emitter-base bandgap grading controlling each road optocoupler again exports, from the first via, the ratio of the current value on current value Yu Hou mono-tunnel on last road is a fixed ratio k, the difference of every road power supply is distinguished with this, convert finally by I/V, Fault Identification is realized by the collection of single-chip microcomputer to magnitude of voltage, its concrete recognition methods is: the emitter-base bandgap grading output current value controlling each road optocoupler, namely on the emitter-base bandgap grading output terminal of each road optocoupler, an emitter resistance is connected in series, the ratio of the emitter resistance value on emitter resistance value Yu Hou mono-tunnel on last road is 1/k, k is the integral multiple of 2, current collection very fixed voltage value input (being 5v in the present embodiment) of optocoupler, by the electric current after emitter resistance after I/V conversion, the voltage acquisition on each road is completed by single-chip microcomputer, due to the ratio relation between emitter resistance value, the voltage on each road therefore collected also presents corresponding ratio relation according to correspondence, levels characteristic under its normal condition is converted to the array mode of 2 systems, the 2 binary state values that the numerical value collected by single-chip microcomputer is corresponding with it compare, thus identify whether power supply output fault and which generation power supply output fault occur.
The positive pole that each road of isolation intrinsically safe power supply exports all is connected in series a voltage stabilizing diode with between optocoupler, judge that whether intrinsically safe power supply magnitude of voltage is normal by the stabilizing voltage characteristic of voltage stabilizing diode, specifically: when power supply exports abnormal, voltage stabilizing diode is in cut-off state, by the cut-off of voltage stabilizing diode and conducting state, the voltage stabilizing diode conducting when power supply exports normal, judges that whether supply voltage value is normal like this.
As shown in the figure, isolation intrinsically safe power supply includes the output on the 1st tunnel ~ the n-th tunnel, often include a voltage stabilizing diode (i.e. ZD1 ~ ZDn) on the way, one optocoupler (i.e. U1 ~ Un), one build-out resistor (i.e. R1 ~ Rn) and an emitter resistance (R11 ~ Rnn), wherein the cathode output end on each road is all connected to the negative pole of voltage stabilizing diode, the cathode output end on each road is all attached to a build-out resistor, 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, the emitter-base bandgap grading output terminal of optocoupler is attached to emitter resistance.In the present embodiment, k gets 2, so when R11 gets 1k, R22 is 2k, during to Rnn, is 2(n-1) k.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of the technical program, it all should be encompassed in the middle of right of the present invention.
Claims (2)
1. multichannel isolation intrinsically safe power supply exports fault recognition method, it is characterized in that: described method is that each road of isolation intrinsically safe power supply is exported the light emitting diode input end all accessing optocoupler, the current value that the emitter-base bandgap grading controlling each road optocoupler again exports, from the first via, the ratio of the current value on current value Yu Hou mono-tunnel on last road is a fixed ratio k, k is the integral multiple of 2, the difference of every road power supply is distinguished with this, finally by I/V conversion, realize Fault Identification by the collection of single-chip microcomputer to magnitude of voltage; The positive pole that each road of isolation intrinsically safe power supply exports all is connected in series a voltage stabilizing diode with between optocoupler, judges that whether intrinsically safe power supply magnitude of voltage is normal by the stabilizing voltage characteristic of voltage stabilizing diode;
For controlling the method for the emitter-base bandgap grading output current value of each road optocoupler be: on the emitter-base bandgap grading output terminal of each road optocoupler, be connected in series an emitter resistance, the ratio of the emitter resistance value on emitter resistance value Yu Hou mono-tunnel on last road is 1/k, k is the integral multiple of 2, by the electric current after emitter resistance after I/V conversion, completed the voltage acquisition on each road by single-chip microcomputer;
Judge that whether intrinsically safe power supply magnitude of voltage is normal by the stabilizing voltage characteristic of voltage stabilizing diode, specifically: when power supply exports abnormal, voltage stabilizing diode is in cut-off state, the voltage stabilizing diode conducting when power supply exports normal.
2. multichannel isolation intrinsically safe power supply according to claim 1 exports fault recognition method, it is characterized in that: described k is 2.
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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 CN102830369A (en) | 2012-12-19 |
| CN102830369B true CN102830369B (en) | 2015-08-26 |
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Cited By (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 |
Families Citing this family (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 |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3961505B2 (en) * | 2004-04-13 | 2007-08-22 | 松下電器産業株式会社 | Voltage detection circuit, power supply device and semiconductor device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 (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 |
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