CN102866176B - Gas-sensitive type smoke sensor for coal mine - Google Patents
Gas-sensitive type smoke sensor for coal mine Download PDFInfo
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- CN102866176B CN102866176B CN201210316954.4A CN201210316954A CN102866176B CN 102866176 B CN102866176 B CN 102866176B CN 201210316954 A CN201210316954 A CN 201210316954A CN 102866176 B CN102866176 B CN 102866176B
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Abstract
The invention provides a gas-sensitive type smoke sensor for a coal mine, and belongs to the technical field of safety facilities of coal mines. The gas-sensitive type smoke sensor comprises a power module circuit, a heating delaying and alarm outputting circuit and a smoke sensor module circuit, wherein the heating delaying and alarm outputting circuit is connected with the smoke sensor module circuit; the power module circuit is connected with the heating delaying and alarm outputting circuit and the smoke sensor module and supplies power for the heating delaying and alarm outputting circuit and the smoke sensor module circuit; the heating delaying and alarm outputting circuit comprises a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R16, a resistor R17, a resistor R18, a rheostat R19, a capacitor C3, a capacitor C4, a capacitor C5, a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a diode D6, an operational amplifier U1A, an operational amplifier U1B, an operational amplifier U2A, an operational amplifier U2B, an operational amplifier U3A, an operational amplifier U3B, a triode Q1 and a bicolor light emitting diode LED1; and the smoke sensor module circuit comprises a resistor R14, a resistor R15, a light touch switch S1 and a smoke probe B. The gas-sensitive type smoke sensor has the advantages that loss power is low, heat productivity is also low, and work reliability is increased.
Description
Technical field
the invention belongs to coalmining safety facility technical field, be specifically related to air-sensitive formula smoke transducer for a kind of colliery.
Background technology
smoke transducer is mainly used in having under coal mine the place of gas and coal dust explosion hazard and fire hazard, and the smog that can produce the burning such as rubber, plastics, coal detect, remote measurement and concentrating monitors.Have that resistance to corrosion is strong, high sensitivity, simple in structure, power consumption is little, cost is low and the feature such as easy maintenance.The smoke transducer existing on market now mainly contain utilize physicochemical property smoke transducer, utilize the smoke transducer of physical property and utilize three kinds of the smoke transducers of electrochemical properties, wherein extensive with the smoke transducer of electrochemical properties, such as current mode smoke transducer and electromotive force type gas sensor etc.The smoke transducer of described electrochemical properties is generally all provided with power module circuitry, that to utilize after three-terminal regulator block voltage stabilizing be other circuit supplies traditionally, if Chinese utility model patent Granted publication number is CN201837576U disclosed " mine smoke sensor ", the thermal value of three-terminal regulator block is large, power attenuation is high, less stable, easily damage, increased use cost.
therefore, be necessary existing colliery to improve with air-sensitive formula smoke transducer, reduce the thermal value of power module circuitry, technical scheme described below produces under this background.
Summary of the invention
the object of the present invention is to provide the air-sensitive formula smoke transducer for colliery that a kind of circuit structure is simple, thermal value is little, functional reliability is good.
the object of the invention is to reach like this, air-sensitive formula smoke transducer for a kind of colliery, comprises power module circuitry, for the heating time delay of output alarm voltage Vout and alarm output circuit with for the smoke transducer modular circuit of output signal voltage Vout1, heating time delay is connected with smoke transducer modular circuit with alarm output circuit, power module circuitry is connected with alarm output circuit and smoke transducer modular circuit with heating time delay, and to heating time delay and alarm output circuit and smoke transducer modular circuit, power, described heating time delay and alarm output circuit comprise resistance R 3～R13, R16～R18, rheostat R19, capacitor C 3～C5, diode D1～D6, operational amplifier U1A, U1B, U2A, U2B, U3A, U3B, triode Q1 and dichromatic LED LED1, 1 pin of one termination dichromatic LED LED1 of resistance R 3, one end of the 2 pin connecting resistance R16 of dichromatic LED LED1, 7 pin of another termination operational amplifier U1B of resistance R 16 and the negative pole of diode D1,6 pin of operational amplifier U1B and 2 pin of operational amplifier U1A, one end of resistance R 5, 6 pin of operational amplifier U2B, 2 pin of operational amplifier U2A and one end of resistance R 6 connect, 1 one end of pin connecting resistance R18 and 3 pin of dichromatic LED LED1 of operational amplifier U1A, the base stage of another termination triode Q1 of resistance R 18, described alarm voltage Vout is also exported in one end of the collector connecting resistance R17 of triode Q1, be used for connecting next stage control device, 3 pin of operational amplifier U1A and one end of capacitor C 3, one end of resistance R 4, the positive pole of one end of resistance R 9 and diode D1 connects, the negative pole of another terminating diode D2 of resistance R 9, the positive pole of diode D2 connects 7 pin of operational amplifier U3B, 6 one end of pin connecting resistance R13 and one end of resistance R 12 of operational amplifier U3B, 1 of the other end of resistance R 13 and rheostat R19, 3 pin of 2 pin and operational amplifier U3A connect, and 1 pin of operational amplifier U3A connects the negative pole of diode D5, one end of the positive pole of diode D5 and resistance R 8, the positive pole of one end of resistance R 7 and diode D4 connects, the negative pole of another terminating diode D3 of resistance R 8 and 5 pin of operational amplifier U2B, the positive pole of diode D3 connects 5 pin of operational amplifier U1B and 7 pin of operational amplifier U2B, the negative pole of diode D4 connects 1 pin of operational amplifier U2A, 3 pin of operational amplifier U2A and one end of resistance R 10, the positive pole of the positive pole of diode D6 and capacitor C 4 connects, 2 pin of operational amplifier U3A and 5 pin of operational amplifier U3B, one end of one end of capacitor C 5 and resistance R 11 connects, the signal voltage Vout1 of smoke transducer modular circuit 3 outputs described in another termination of resistance R 11, the other end of resistance R 17, 8 pin of operational amplifier U1A, the other end of resistance R 5, the other end of resistance R 7, 8 pin of operational amplifier U3A, 8 pin of operational amplifier U2A, the other end of resistance R 10, the other end of the negative pole of diode D6 and resistance R 12 meets direct supply VCC jointly, the other end of resistance R 3, the emitter of triode Q1, 4 pin of operational amplifier U1A, the other end of capacitor C 3, the other end of resistance R 4, the other end of resistance R 6, 4 pin of operational amplifier U3A, the other end of capacitor C 5, the negative pole of capacitor C 4, the 4 pin common grounds of 3 pin of rheostat R19 and operational amplifier U2A, described smoke transducer modular circuit comprises resistance R 14, R15, touch-switch S1 and smog probe B, 4 of one end of one end connection touch-switch S1 of resistance R 14 and smog probe B, 6 pin are also exported described signal voltage Vout1, one end of 5 pin connecting resistance R15 of smog probe B, 1 of smog probe B, 2, 3 pin, the other end of touch-switch S1 meets direct supply VCC jointly, the other end common ground of the other end of resistance R 14 and resistance R 15.
the present invention is owing to having adopted said structure, the advantage having is: in power module circuitry, adopted switch type buck regulator, with respect to traditional circuit of three-terminal voltage-stabilizing integrated, there is the features such as loss power is little, thermal value is low, thereby increased the stability in use of smoke transducer.
Accompanying drawing explanation
fig. 1 is theory diagram of the present invention.
fig. 2 is the electrical schematic diagram of the power module circuitry shown in Fig. 1.
fig. 3 is the heating time delay shown in Fig. 1 and the electrical schematic diagram of alarm output circuit.
fig. 4 is the electrical schematic diagram of the smoke transducer modular circuit shown in Fig. 1.
Embodiment
in order to make the public can fully understand technical spirit of the present invention and beneficial effect; applicant will describe in detail the specific embodiment of the present invention below by reference to the accompanying drawings; but applicant is not the restriction to technical scheme to the description of embodiment, anyly according to the present invention design, changes in the form rather than substance all and should be considered as protection scope of the present invention.
refer to Fig. 1, air-sensitive formula smoke transducer for a kind of colliery, comprises power module circuitry 1, heating time delay and alarm output circuit 2, smoke transducer modular circuit 3, and heating time delay is connected with smoke transducer modular circuit 3 with alarm output circuit 2.Described smoke transducer modular circuit 3, for gathering the smog situation under current environment, sends a signal to heating time delay and alarm output circuit 2.The signal that 2 pairs of smoke transducer modular circuits 3 of described heating time delay and alarm output circuit are sent to compares judgement and processes, and output alarm signal is to next stage control device.The direct supply that power module circuitry 1 provides main circuit is supplied with respectively heating time delay and alarm output circuit 2 and smoke transducer modular circuit 3 by conversion.
refer to Fig. 2, described power module circuitry 1 comprises diode D7, D8, capacitor C 1, C2, inductance L 1 and voltage-releasing voltage stabilizer U8, and described voltage-releasing voltage stabilizer U8 is switch type buck regulator, is specially LM2576.The direct supply that main circuit provides is transformed to direct supply VCC after accessing voltage-releasing voltage stabilizer U8 by diode D7, and capacitor C 1 is input filtering electric capacity, and diode D8 is reverse fly-wheel diode, and capacitor C 2 and inductance L 1 form LC filtering circuit.
refer to Fig. 3, described heating time delay and alarm output circuit 2 comprise resistance R 3～R13, R16～R18, rheostat R19, capacitor C 3～C5, diode D1～D6, operational amplifier U1A, U1B, U2A, U2B, U3A, U3B, triode Q1 and dichromatic LED LED1, and dichromatic LED LED1 adopts red and green color herein.After main circuit energising, direct supply VCC place in circuit, provides anti-phase comparative voltage to operational amplifier U1A, U1B, U2A, U2B by resistance R 5, gives capacitor C 4 chargings simultaneously.When capacitor C 4 has just started to charge, the positive phase voltage of operational amplifier U2A is less than reverse voltage, output low level, thereby by the voltage between diode D4 pull down resistor R7, R8; When capacitor C 4 is after charging a period of times, the positive phase voltage of operational amplifier U2A is greater than reverse voltage, output high level, thus make the voltage between resistance R 7, R8 can not be drop-down by diode D4.The positive phase voltage of operational amplifier U3A is provided with rheostat R19 by resistance R 13, and changes with the variation of rheostat R19 resistance.The reverse voltage of operational amplifier U3A is provided through resistance R 11 by the signal voltage Vout1 of smoke transducer modular circuit 3 outputs.When the positive phase voltage of operational amplifier U3A is less than reverse voltage, output low level, thereby by the voltage between diode D5 pull down resistor R7, R8; When the positive phase voltage of operational amplifier U3A is greater than reverse voltage, output high level, thus make the voltage between resistance R 7, R8 can not be drop-down by diode D5.Only have when the output of operational amplifier U2A, U3A is high level, just can make the positive phase voltage that is added in operational amplifier U2B higher than reverse voltage, by relatively exporting high level, further relatively export high level with operational amplifier U1B again, make 1, the 2 pin conductings of dichromatic LED LED1, send green glow, indication circuit power connection can normally be worked, and diode D3 plays unidirectional retroactive effect.The reverse voltage of operational amplifier U3B is provided by resistance R 12, R13, and can regulate by rheostat R19, and positive phase voltage is provided through resistance R 11 by the signal voltage Vout1 of smoke transducer modular circuit 3 outputs.When the positive phase voltage of operational amplifier U3B is greater than reverse voltage, output high level, diac D2 conducting is also added to voltage the positive of operational amplifier U1A, through relatively exporting high level, make 1, the 3 pin conductings of dichromatic LED LED1, send ruddiness, while trigger triode Q1, the output voltage V out that makes to report to the police becomes low level from high level, and the work of next stage control device, controls the startups such as spraying plant.In this process, after capacitor C 4 has been charged, as long as Power supply is normal, the positive phase voltage of operational amplifier U2A is greater than reverse voltage always, known according to above-mentioned analysis, and operational amplifier U1B will export high level.If operational amplifier U1B output low level, can be undertaken by diode D1 unidirectional drop-downly, make the output of operational amplifier U1A unchanged.
refer to Fig. 4 and in conjunction with Fig. 3, described smoke transducer modular circuit 3 comprises resistance R 14, R15, touch-switch S1 and smog probe B, in the present embodiment, smog probe B adopts MQ2 air-sensitive formula smog probe.After main circuit energising, direct supply VCC place in circuit is for the heater strip H-H work of smog probe B, and after heater strip H-H preheating certain hour, smog probe B could normally detect smog.When cigarette having been detected, 4,6 pin voltages of smog probe B increase with the rising of smokescope, and the signal voltage Vout1 of output raises.Now, regulate the resistance of the rheostat R19 in heating time delay and alarm output circuit 2, make the positive phase voltage of operational amplifier U3B be greater than reverse voltage, output high level, diac D2 conducting is also added to voltage the positive terminal of operational amplifier U1A, operational amplifier U1A exports high level, makes 1, the 3 pin conductings of dichromatic LED LED1, sends ruddiness.The output voltage V out that simultaneously makes to report to the police becomes low level from high level, starts next stage control circuit and makes corresponding indication, such as starting spraying plant etc.When smog reduces gradually, the signal voltage Vout1 of output diminishes, when the positive phase voltage of operational amplifier U3B is less than reverse voltage, operational amplifier U3B output low level, diode D2 cut-off, the positive phase voltage of operational amplifier U1A is less than reverse voltage, output low level, make 1, the 3 pin cut-offs of dichromatic LED LED1, ruddiness extinguishes a BG light.The output voltage V out that simultaneously makes to report to the police becomes high level from low level, starts next stage control circuit and makes corresponding indication, for example, make spraying plant quit work.In addition, touch-switch S1 is test button, presses touch-switch S1, and 4,6 pin voltages of smog probe B raise, and the signal voltage Vout1 of output raises, thereby can test heating time delay and whether alarm output circuit 2 can normally work.
in power module circuitry 1 of the present invention, adopt switch type buck regulator, with respect to traditional circuit of three-terminal voltage-stabilizing integrated, there is the features such as loss power is little, thermal value is low; In addition, heating time delay and alarm output circuit 2 have adopted full comparator circuit, and simple and practical, dependable performance, fault are easy to eliminating; Smoke transducer modular circuit 3 can require to adopt different smog probes for different environmental characteristicses, different detection, thereby makes this circuit working good stability, antijamming capability is strong and image data is accurate, has reached goal of the invention.
Claims (1)
1.
an air-sensitive formula smoke transducer for colliery, comprises power module circuitry (1), for the heating time delay of output alarm voltage Vout and alarm output circuit (2) with for the smoke transducer modular circuit (3) of output signal voltage Vout1, heating time delay is connected with smoke transducer modular circuit (3) with alarm output circuit (2), power module circuitry (1) is connected with alarm output circuit (2) and smoke transducer modular circuit (3) with heating time delay, and to heating time delay and alarm output circuit (2) and smoke transducer modular circuit (3), power, described heating time delay and alarm output circuit (2) comprise resistance R 3～R13, R16～R18, rheostat R19, capacitor C 3～C5, diode D1～D6, operational amplifier U1A, U1B, U2A, U2B, U3A, U3B, triode Q1 and dichromatic LED LED1, 1 pin of one termination dichromatic LED LED1 of resistance R 3, one end of the 2 pin connecting resistance R16 of dichromatic LED LED1, 7 pin of another termination operational amplifier U1B of resistance R 16 and the negative pole of diode D1,6 pin of operational amplifier U1B and 2 pin of operational amplifier U1A, one end of resistance R 5, 6 pin of operational amplifier U2B, 2 pin of operational amplifier U2A and one end of resistance R 6 connect, 1 one end of pin connecting resistance R18 and 3 pin of dichromatic LED LED1 of operational amplifier U1A, the base stage of another termination triode Q1 of resistance R 18, described alarm voltage Vout is also exported in one end of the collector connecting resistance R17 of triode Q1, be used for connecting next stage control device, 3 pin of operational amplifier U1A and one end of capacitor C 3, one end of resistance R 4, the positive pole of one end of resistance R 9 and diode D1 connects, the negative pole of another terminating diode D2 of resistance R 9, the positive pole of diode D2 connects 7 pin of operational amplifier U3B, 6 one end of pin connecting resistance R13 and one end of resistance R 12 of operational amplifier U3B, 1 of the other end of resistance R 13 and rheostat R19, 3 pin of 2 pin and operational amplifier U3A connect, and 1 pin of operational amplifier U3A connects the negative pole of diode D5, one end of the positive pole of diode D5 and resistance R 8, the positive pole of one end of resistance R 7 and diode D4 connects, the negative pole of another terminating diode D3 of resistance R 8 and 5 pin of operational amplifier U2B, the positive pole of diode D3 connects 5 pin of operational amplifier U1B and 7 pin of operational amplifier U2B, the negative pole of diode D4 connects 1 pin of operational amplifier U2A, 3 pin of operational amplifier U2A and one end of resistance R 10, the positive pole of the positive pole of diode D6 and capacitor C 4 connects, 2 pin of operational amplifier U3A and 5 pin of operational amplifier U3B, one end of one end of capacitor C 5 and resistance R 11 connects, the signal voltage Vout1 of smoke transducer modular circuit (3) output described in another termination of resistance R 11, the other end of resistance R 17, 8 pin of operational amplifier U1A, the other end of resistance R 5, the other end of resistance R 7, 8 pin of operational amplifier U3A, 8 pin of operational amplifier U2A, the other end of resistance R 10, the other end of the negative pole of diode D6 and resistance R 12 meets direct supply VCC jointly, the other end of resistance R 3, the emitter of triode Q1, 4 pin of operational amplifier U1A, the other end of capacitor C 3, the other end of resistance R 4, the other end of resistance R 6, 4 pin of operational amplifier U3A, the other end of capacitor C 5, the negative pole of capacitor C 4, the 4 pin common grounds of 3 pin of rheostat R19 and operational amplifier U2A, described smoke transducer modular circuit (3) comprises resistance R 14, R15, touch-switch S1 and smog probe B, 4 of one end of one end connection touch-switch S1 of resistance R 14 and smog probe B, 6 pin are also exported described signal voltage Vout1, one end of 5 pin connecting resistance R15 of smog probe B, 1 of smog probe B, 2, 3 pin, the other end of touch-switch S1 meets direct supply VCC jointly, the other end common ground of the other end of resistance R 14 and resistance R 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210316954.4A CN102866176B (en) | 2012-08-31 | 2012-08-31 | Gas-sensitive type smoke sensor for coal mine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210316954.4A CN102866176B (en) | 2012-08-31 | 2012-08-31 | Gas-sensitive type smoke sensor for coal mine |
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| Publication Number | Publication Date |
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| CN102866176A CN102866176A (en) | 2013-01-09 |
| CN102866176B true CN102866176B (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210316954.4A Active CN102866176B (en) | 2012-08-31 | 2012-08-31 | Gas-sensitive type smoke sensor for coal mine |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107331139B (en) * | 2017-07-15 | 2020-05-01 | 潍坊康吉诺电子科技有限公司 | Wireless intelligent detection sensor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4203100A (en) * | 1977-05-23 | 1980-05-13 | Hochiki Corporation | Light decrease type smoke sensor |
| CN2145414Y (en) * | 1992-12-30 | 1993-11-03 | 吴汝怀 | gas leakage alarm |
| CN101546466A (en) * | 2008-03-24 | 2009-09-30 | 武光杰 | Smoke sensing module |
| CN201838134U (en) * | 2010-09-08 | 2011-05-18 | 四川德阳西德电器有限公司 | Dual-inspection smoke detector |
| CN201837576U (en) * | 2010-10-25 | 2011-05-18 | 淮南润成科技有限公司 | Mine smoke sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060078312A (en) * | 2004-12-31 | 2006-07-05 | 주식회사 신우전자 | Gas sensing device |
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2012
- 2012-08-31 CN CN201210316954.4A patent/CN102866176B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4203100A (en) * | 1977-05-23 | 1980-05-13 | Hochiki Corporation | Light decrease type smoke sensor |
| CN2145414Y (en) * | 1992-12-30 | 1993-11-03 | 吴汝怀 | gas leakage alarm |
| CN101546466A (en) * | 2008-03-24 | 2009-09-30 | 武光杰 | Smoke sensing module |
| CN201838134U (en) * | 2010-09-08 | 2011-05-18 | 四川德阳西德电器有限公司 | Dual-inspection smoke detector |
| CN201837576U (en) * | 2010-10-25 | 2011-05-18 | 淮南润成科技有限公司 | Mine smoke sensor |
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| CN102866176A (en) | 2013-01-09 |
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