CN102967690B - Colliery self diagnosis carbon monoxide transducer and self-diagnosing method - Google Patents
Colliery self diagnosis carbon monoxide transducer and self-diagnosing method Download PDFInfo
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Abstract
The present invention relates to colliery self diagnosis carbon monoxide transducer and self-diagnosing method, comprise: intrinsic safety electric source electrical connection cell conversion module electrical connection central processing unit in intrinsic safety shell, intrinsic safety electric source is order electric connection of power supply modular converter also, Carbon Monoxide Detection circuit, central processing unit, power transfer module is also electrically connected output port multiplex circuit, cell conversion module electric connection of power supply modular converter, central processing unit also distinguishes infrared connection Infrared remote controller, electrical connection display module, feature is central processing unit electrical connection control RS485 communication module, frequency output terminal, the output port multiplex circuit of current output terminal, provide the self-diagnosing method of colliery self diagnosis carbon monoxide transducer simultaneously.Present invention achieves and export the integration of multimode communication mode, achieve infrared remote control simultaneously, to the self diagnosis of the open circuit of current mode, frequency type, RS485 bus-type output circuit, short circuit, communication signal malfunction, to self diagnosis and the information transmission of carbon monoxide element.
Description
Technical field
The invention belongs to colliery sensor technical field, relate to colliery carbon monoxide transducer, particularly relate to carbon monoxide transducer and the self-diagnosing method of colliery self diagnosis.
Background technology
At present, China's coal-mine safety monitoring system obtains tremendous development, but also there are some urgent problems, particularly in the information acquisition and transmission technology of Coal Mine Safety Monitoring System, restrict by factors such as wrong report, monitoring blind area, acquisition method falls behind, the sensor adjustment cycle is short, intelligence degree is not high, maintenance workload is large, personnel's maloperations, had a strong impact on the reliability of coal mine safety monitoring system.Particularly existing colliery carbon monoxide transducer is without substantive fault self-diagnosis function, special in component wear degree, the whether normal self-diagnostic function of power work situation, only have cabled digital information transfer capability or frequency type signal transfer functions, have signal wire fault to cause monitoring the technical matters etc. interrupting producing wrong report.Central processing unit directly connects RS485 communication module or frequency output terminal or current output terminal, and the standard that current different mine adopts does not coexist when selecting can cause situations such as not mating, the self-diagnostic function imperfection of carbon monoxide transducer.
Summary of the invention
For the technical matters existing for the carbon monoxide transducer of existing colliery, increase its carbon monoxide transducer self-diagnosis function, there is provided one self diagnosis component wear and power supply whether normally to work, the open circuit of current mode, frequency type, RS485 bus-type output circuit, short circuit, communication signal whether fault the colliery carbon monoxide transducer of self diagnosis and self-diagnosing method.
The present invention want the technical scheme of technical solution problem to be: a kind of colliery self diagnosis carbon monoxide transducer is provided, comprise: after in intrinsic safety shell, intrinsic safety electric source 101 is electrically connected cell conversion module 102, electrical connection central processing unit 105, intrinsic safety electric source 101 is order electric connection of power supply modular converter 103 also, Carbon Monoxide Detection circuit 104, central processing unit 105, power transfer module 103 is also electrically connected output port multiplex circuit 111, cell conversion module 102 electric connection of power supply modular converter 103, central processing unit 105 also distinguishes infrared connection Infrared remote controller 110, electrical connection display module 109, central processing unit 105 is electrically connected control RS485 communication module 106, frequency output terminal 107, the output port multiplex circuit 111 of current output terminal 108.
Wherein: wireless module 112 is electrically connected with central processing unit 105.
Wherein: output port multiplex circuit 111, 1 pin comprising gating switch U2 connects current output terminal 108 circuit, 2 pin ground connection, 3 pins connect frequency output terminal 107 circuit, 5 pins connect+5V voltage end, 6 pin PORT_CTRL1 connect the I/O mouth of central processing unit 105, 4 pins of gating switch U2 connect 3 pins of gating switch U3, 1 pin of U3 is connected with 485_A, 2 pin ground connection, 6 pin PORT_CTRL2 are connected with the I/O mouth of central processing unit 105, 5 pins connect+5V voltage end, 1 pin of gating switch U5 meets 485_B, 2, 3 pin ground connection, 5 pins connect+5V voltage end, 6 pin PORT_CTRL3 are connected with the I/O mouth of central processing unit 105, after 4 pins of resistance R9 with U3 are connected, by 4 pins of bi-directional voltage stabilizing diode D4 and U5, resistance R15 is connected, R15 with R9 is connected by bi-directional voltage stabilizing diode D5, C6, R9 and R15 is met respectively after C7 series connection, C6, the neutral earthing of C7 two capacitances in series, C6, two termination signal output port J2 after C7 two capacitances in series.
Wherein: Carbon Monoxide Detection circuit, 1 pin of 1 pin and operational amplifier U8A that comprise carbon monoxide element U7 connects, 2 pins of U7 are connected to 6 pins of operational amplifier U8B through resistance R51, 3 pins of U7 are connected to 2 pins of U8A through resistance R41 and R42, polarity free capacitor C13 is connected with 1 pin of U7 and resistance R42 respectively, 2 pins of the S termination U7 of field effect transistor Q17, 3 pins of D termination U7, G end connects+3V3 power supply through resistance R49, 3 pins of U8A are connected through 6 pins of resistance R45 and U8B, the 4 pin ground connection of U8A, 8 pins of U8A connect+3V3 power supply, 5 pins of U8B connect 1V2 power supply through R55 resistance, the two ends of electric capacity C19 and resistance R50 form parallel relationship with 6 pins of U8B and 7 pins respectively, 1 pin of connection terminal P1 is connected through 7 pins of resistance R54 and U8B, resistance R56 one end ground connection, one end is connected with 1 pin of P1, electric capacity C24 and R56 is in parallel, 2 pins of P1 connect 1V2 power supply, 3 pins of P1 connect+3V3 power supply, the 4 pin ground connection of P1, 6 pins of high conductivity low leakage diode D6 mono-termination U8B, one termination 1V2 power supply, one termination+3V3 the power supply of polarity free capacitor C25, one end ground connection, voltage stabilizing diode U14 is through resistance R76 ground connection, another termination 1V2 power supply and resistance R59, R59 meets+3V3 power supply and polarity free capacitor C25, electric capacity C14 positive pole connects+3V3 power supply, minus earth, polarity free capacitor C15 and C16 and C14 is in parallel.
The self-diagnosing method of a kind of colliery self diagnosis carbon monoxide transducer is provided to be: to the diagnosis of fault, first judge signal output type, when PORT_CTRL1 is high (H) voltage, PORT_CTRL2 is low (L) voltage, when PORT_CTRL3 is low (L) voltage, for current mode exports; When PORT_CTRL1 is low (L) voltage, PORT_CTRL2 is low (L) voltage, when PORT_CTRL3 is low (L) voltage, for frequency type exports; When PORT_CTRL1 is any (X) voltage, PORT_CTRL2 is high (H) voltage, when PORT_CTRL3 is high (H) voltage, is that RS485 bus-type exports; When signal output type is current mode output, current mode open circuit LED light is bright is open circuit, and it is without open circuit that current mode open circuit LED light is extinguished, and be short circuit when current mode short circuit LED light is bright, the extinguishing of current mode short circuit LED light is without short circuit; When signal output type is frequency type output, frequency type open circuit LED light is bright is open circuit, and it is without open circuit that frequency type open circuit LED light is extinguished, and be short circuit when frequency type short circuit LED light is bright, the extinguishing of frequency type short circuit LED light is without short circuit; When signal output type is the output of RS485 bus-type, RS485 communication failure LED light lights communication failure, and RS485 communication failure LED light extinguishes communication normally.
Wherein: the self-diagnosing method of carbon monoxide element is for being on trouble-free basis in above circuit judges, when Infrared remote controller calibration or the adjustment original state of colliery with self diagnosis carbon monoxide transducer, cannot calibrate and maybe cannot adjust, think carbon monoxide component wear, otherwise carbon monoxide element is without damage.
The invention has the beneficial effects as follows: the invention provides output port multiplex circuit 111, achieve current mode, frequency type, RS485 bus-type exports the integration of multimode communication mode, meet the demand of current coal mine safety monitoring system different systems, signal transmission can wired or wirelessly export, achieve infrared remote control simultaneously, by the software programming of self-diagnosing method to central processing unit, achieve the present invention to current mode, frequency type, the open circuit of RS485 bus-type output circuit, short circuit, the self diagnosis of communication signal malfunction, achieve the self diagnosis to carbon monoxide element and information transmission simultaneously.
Accompanying drawing explanation
Fig. 1. first embodiment of the invention structure principle chart;
Fig. 2. power transfer module schematic diagram of the present invention;
Fig. 3. Carbon Monoxide Detection circuit theory diagrams of the present invention;
Fig. 4. RS485 communication module schematic diagram of the present invention;
Fig. 5. output port multiplex circuit schematic diagram of the present invention;
Fig. 6. display module schematic diagram of the present invention;
Fig. 7. cell conversion module schematic diagram of the present invention;
Fig. 8. second embodiment of the invention structure principle chart;
Fig. 9. wireless module schematic diagram of the present invention.
Embodiment
Accompanying drawing number
In figure, 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 is the number of pins of components and parts, 101. intrinsic safety electric sources, 102. cell conversion module, 103. power transfer module, 104. Carbon Monoxide Detection circuit, 105. central processing units, 106. RS485 communication modules, 107. frequency output terminal, 108. current output terminals, 109. display modules, 110. Infrared remote controller, 111. output port multiplex circuits, 112. wireless modules.
first embodiment
Composition graphs 1. first embodiment of the invention structure principle chart, a kind of colliery self diagnosis carbon monoxide transducer, comprise: after in intrinsic safety shell, intrinsic safety electric source 101 is electrically connected cell conversion module 102, electrical connection central processing unit 105, intrinsic safety electric source 101 is order electric connection of power supply modular converter 103 also, Carbon Monoxide Detection circuit 104, central processing unit 105, power transfer module 103 is also electrically connected output port multiplex circuit 111, cell conversion module 102 electric connection of power supply modular converter 103, central processing unit 105 also distinguishes infrared connection Infrared remote controller 110, electrical connection display module 109, feature is that central processing unit 105 is electrically connected control RS485 communication module 106, frequency output terminal 107, the output port multiplex circuit 111 of current output terminal 108.
Wherein: STM32F103V8T6 model selected by central processing unit 105.
Composition graphs 2. power transfer module schematic diagram of the present invention, wherein: power transfer module is general module, J1 connects intrinsic safety electric source input port, + 10V connects cell conversion module input port, DC+ 9 ~ 24V power supply one tunnel is through DC/DC transducer, be transformed into+5V to be accessed by+5V power transfer module output port for Carbon Monoxide Detection circuit 104 and output port multiplex circuit 111, another road, through DC/DC transducer, is transformed into+3.3V and is accessed by+3V3 power transfer module output port for central processing unit 105.
Composition graphs 3. Carbon Monoxide Detection circuit of the present invention, wherein: 1 pin of carbon monoxide element U7 connects with 1 pin of operational amplifier U8A, 2 pins of U7 are connected to 6 pins of operational amplifier U8B through resistance R51, 3 pins of U7 are connected to 2 pins of U8A through resistance R41 and R42, polarity free capacitor C13 is connected with 1 pin of U7 and resistance R42 respectively, 2 pins of the S termination U7 of field effect transistor Q17, 3 pins of D termination U7, G end connects+3V3 power supply through resistance R49, 3 pins of U8A are connected through 6 pins of resistance R45 and U8B, the 4 pin ground connection of U8A, 8 pins of U8A connect+3V3 power supply, 5 pins of U8B connect 1V2 power supply through R55 resistance, the two ends of electric capacity C19 and resistance R50 form parallel relationship with 6 pins of U8B and 7 pins respectively, 1 pin of connection terminal P1 is connected through 7 pins of resistance R54 and U8B, resistance R56 one end ground connection, one end is connected with 1 pin of P1, electric capacity C24 and R56 is in parallel, 2 pins of P1 connect 1V2 power supply, 3 pins of P1 connect+3V3 power supply, the 4 pin ground connection of P1, 6 pins of high conductivity low leakage diode D6 mono-termination U8B, one termination 1V2 power supply, one termination+3V3 the power supply of polarity free capacitor C25, one end ground connection, voltage stabilizing diode U14 is through resistance R76 ground connection, another termination 1V2 power supply and resistance R59, R59 meets+3V3 power supply and polarity free capacitor C25, polarity free capacitor C14 positive pole connects+3V3 power supply, minus earth, polarity free capacitor C15 and C16 and C14 is in parallel.
Composition graphs 4. RS485 communication module of the present invention schematic diagram, wherein: RS485 communication module is general module, U4 is low-power consumption RS485 transceiver, selects MAX3485 model, completes the transmission of information.
Composition graphs 5. output port multiplex circuit of the present invention schematic diagram, wherein: output port multiplex circuit 111, 1 pin comprising gating switch U2 connects current output terminal 108 circuit, 2 pin ground connection, 3 pins connect frequency output terminal 107 circuit, 5 pins connect+5V voltage end, 6 pin PORT_CTRL1 connect the I/O mouth of central processing unit 105, 4 pins of gating switch U2 connect 3 pins of gating switch U3, 1 pin of U3 is connected with 485_A, 2 pin ground connection, 6 pin PORT_CTRL2 are connected with the I/O mouth of central processing unit 105, 5 pins connect+5V voltage end, 1 pin of gating switch U5 meets 485_B, 2, 3 pin ground connection, 5 pins connect+5V voltage end, 6 pin PORT_CTRL3 are connected with the I/O mouth of central processing unit 105, after 4 pins of resistance R9 with U3 are connected, by 4 pins of bi-directional voltage stabilizing diode D4 and U5, resistance R15 is connected, R15 with R9 is connected by bi-directional voltage stabilizing diode D5, C6, R9 and R15 is met respectively after C7 series connection, C6, the neutral earthing of C7 two capacitances in series, C6, two termination signal output port J2 after C7 two capacitances in series.
Composition graphs 6. display module schematic diagram of the present invention, wherein: display module is general module, adopts general high brightness eight segment numeral pipe, display numerical value.
Composition graphs 7. cell conversion module schematic diagram of the present invention, wherein: cell conversion module is general module.
second embodiment
Composition graphs 8. second embodiment of the invention structure principle chart, a kind of colliery self diagnosis carbon monoxide transducer, comprise: after in intrinsic safety shell, intrinsic safety electric source 101 is electrically connected cell conversion module 102, electrical connection central processing unit 105, intrinsic safety electric source 101 is order electric connection of power supply modular converter 103 also, Carbon Monoxide Detection circuit 104, central processing unit 105, power transfer module 103 is also electrically connected output port multiplex circuit 111, cell conversion module 102 electric connection of power supply modular converter 103, central processing unit 105 also distinguishes infrared connection Infrared remote controller 110, electrical connection display module 109, feature is that central processing unit 105 is electrically connected control RS485 communication module 106, frequency output terminal 107, the output port multiplex circuit 111 of current output terminal 108, central processor CPU 105 is also electrically connected wireless module 112.
Wherein: STM32F103V8T6 model selected by central processing unit 10.
Composition graphs 2. power transfer module schematic diagram of the present invention, wherein: power transfer module is general module, J1 connects intrinsic safety electric source input port, + 10V connects cell conversion module input port, DC+ 9 ~ 24V power supply one tunnel is through DC/DC transducer, be transformed into+5V to be accessed by+5V power transfer module output port for Carbon Monoxide Detection circuit 104 and output port multiplex circuit 111, another road, through DC/DC transducer, is transformed into+3.3V and is accessed by+3V3 power transfer module output port for central processing unit 105.
Composition graphs 3. Carbon Monoxide Detection circuit of the present invention, wherein: 1 pin of carbon monoxide element U7 connects with 1 pin of operational amplifier U8A, 2 pins of U7 are connected to 6 pins of operational amplifier U8B through resistance R51, 3 pins of U7 are connected to 2 pins of U8A through resistance R41 and R42, polarity free capacitor C13 is connected with 1 pin of U7 and resistance R42 respectively, 2 pins of the S termination U7 of field effect transistor Q17, 3 pins of D termination U7, G end connects+3V3 power supply through resistance R49, 3 pins of U8A are connected through 6 pins of resistance R45 and U8B, the 4 pin ground connection of U8A, 8 pins of U8A connect+3V3 power supply, 5 pins of U8B connect 1V2 power supply through R55 resistance, the two ends of electric capacity C19 and resistance R50 form parallel relationship with 6 pins of U8B and 7 pins respectively, 1 pin of connection terminal P1 is connected through 7 pins of resistance R54 and U8B, resistance R56 one end ground connection, one end is connected with 1 pin of P1, electric capacity C24 and R56 is in parallel, 2 pins of P1 connect 1V2 power supply, 3 pins of P1 connect+3V3 power supply, the 4 pin ground connection of P1, 6 pins of high conductivity low leakage diode D6 mono-termination U8B, one termination 1V2 power supply, one termination+3V3 the power supply of C25, one end ground connection, U14 is through resistance R76 ground connection, another termination 1V2 power supply and R59, R59 meets+3V3 power supply and C25, electric capacity C14 positive pole connects+3V3 power supply, minus earth, polarity free capacitor C15 and C16 and C14 is in parallel.
Composition graphs 4. RS485 communication module of the present invention schematic diagram, wherein: RS485 communication module is general module, U4 is low-power consumption RS485 transceiver, selects MAX3485 model, completes the transmission of information.
Composition graphs 5. output port multiplex circuit of the present invention schematic diagram, wherein: output port multiplex circuit 111, 1 pin comprising gating switch U2 connects current output terminal 108 circuit, 2 pin ground connection, 3 pins connect frequency output terminal 107 circuit, 5 pins connect+5V voltage end, 6 pin PORT_CTRL1 connect the I/O mouth of central processing unit 105, 4 pins of gating switch U2 connect 3 pins of gating switch U3, 1 pin of U3 is connected with 485_A, 2 pin ground connection, 6 pin PORT_CTRL2 are connected with the I/O mouth of central processing unit 105, 5 pins connect+5V voltage end, 1 pin of gating switch U5 meets 485_B, 2, 3 pin ground connection, 5 pins connect+5V voltage end, 6 pin PORT_CTRL3 are connected with the I/O mouth of central processing unit (105), after 4 pins of resistance R9 with U3 are connected, by 4 pins of bi-directional voltage stabilizing diode D4 and U5, resistance R15 is connected, R15 with R9 is connected by bi-directional voltage stabilizing diode D5, C6, R9 and R15 is met respectively after C7 series connection, C6, the neutral earthing of C7 two capacitances in series, C6, two termination signal output port J2 after C7 two capacitances in series.
Composition graphs 6. display module schematic diagram of the present invention, wherein: display module is general module, adopts general high brightness eight segment numeral pipe, display numerical value.
Composition graphs 7. cell conversion module schematic diagram of the present invention, wherein: cell conversion module is general module.
Composition graphs 9. wireless module schematic diagram of the present invention, wherein: wireless module is general module, the chip that Wireless Data Transmission adopts is the NRF24L01 type that Nordic Semiconductor company produces, and uses 2.4GHz global open ISM band.
Principle of work of the present invention is introduced: according to the signal output type of the coal mine safety monitoring system that mine uses at present for ease of understanding, determine to use current mode output or frequency type to export or the output of RS485 bus-type, adopt Infrared remote controller setting signal output type, corresponding to after output terminal access, Infrared remote controller is calibrated and is adjusted original state of the present invention, when wire signal is normal, uses wired output signal type, when wire signal interrupts, self-starting wireless signal output form.To the introduction see the self-diagnosing method of following a kind of colliery self diagnosis carbon monoxide transducer of the self-diagnosing method of the open circuit of current mode, frequency type, RS485 bus-type output circuit, short circuit, communication signal malfunction.
3rd embodiment
The self-diagnosing method of a kind of colliery self diagnosis carbon monoxide transducer is: to the diagnosis of fault, first judge signal output type, when PORT_CTRL1 is high (H) voltage, PORT_CTRL2 is low (L) voltage, when PORT_CTRL3 is low (L) voltage, for current mode exports; When PORT_CTRL1 is low (L) voltage, PORT_CTRL2 is low (L) voltage, when PORT_CTRL3 is low (L) voltage, for frequency type exports; When PORT_CTRL1 is any (X) voltage, PORT_CTRL2 is high (H) voltage, when PORT_CTRL3 is high (H) voltage, is that RS485 bus-type exports; When signal output type is current mode output, current mode open circuit LED light is bright is open circuit, and it is without open circuit that current mode open circuit LED light is extinguished, and be short circuit when current mode short circuit LED light is bright, the extinguishing of current mode short circuit LED light is without short circuit; When signal output type is frequency type output, frequency type open circuit LED light is bright is open circuit, and it is without open circuit that frequency type open circuit LED light is extinguished, and be short circuit when frequency type short circuit LED light is bright, the extinguishing of frequency type short circuit LED light is without short circuit; When signal output type is the output of RS485 bus-type, RS485 communication failure LED light lights communication failure, and RS485 communication failure LED light extinguishes communication normally.
Wherein: the self-diagnosing method of carbon monoxide element is for being on trouble-free basis in above circuit judges, when Infrared remote controller calibration or the adjustment original state of colliery with self diagnosis carbon monoxide transducer, cannot calibrate and maybe cannot adjust, think carbon monoxide component wear, otherwise carbon monoxide element is without damage.
Thus achieve the open circuit to the present invention self, whether short circuit, communication diagnose normally, self diagnosis is carried out to carbon monoxide component wear simultaneously, and diagnostic message is transmitted.
Claims (5)
1. a colliery self diagnosis carbon monoxide transducer, after comprising in intrinsic safety shell intrinsic safety electric source (101) electrical connection cell conversion module (102), electrical connection central processing unit (105), intrinsic safety electric source (101) is order electric connection of power supply modular converter (103) also, Carbon Monoxide Detection circuit (104), central processing unit (105), power transfer module (103) is also electrically connected output port multiplex circuit (111), cell conversion module (102) electric connection of power supply modular converter (103), central processing unit (105) also distinguishes infrared connection Infrared remote controller (110), electrical connection display module (109), central processing unit (105) electrical connection control RS485 communication module (106), frequency output terminal (107), the output port multiplex circuit (111) of current output terminal (108), it is characterized in that: output port multiplex circuit (111), 1 pin comprising gating switch U2 connects current output terminal (108) circuit, 2 pin ground connection, 3 pins connect frequency output terminal (107) circuit, 5 pins connect+5V voltage end, 6 pin PORT_CTRL1 connect the I/O mouth of central processing unit (105), 4 pins of gating switch U2 connect 3 pins of gating switch U3, 1 pin of U3 is connected with 485_A, 2 pin ground connection, 6 pin PORT_CTRL2 are connected with the I/O mouth of central processing unit (105), 5 pins connect+5V voltage end, 1 pin of gating switch U5 meets 485_B, 2, 3 pin ground connection, 5 pins connect+5V voltage end, 6 pin PORT_CTRL3 are connected with the I/O mouth of central processing unit (105), after 4 pins of resistance R9 with U3 are connected, by 4 pins of bi-directional voltage stabilizing diode D4 and U5, resistance R15 is connected, R15 with R9 is connected by bi-directional voltage stabilizing diode D5, C6, R9 and R15 is met respectively after C7 series connection, C6, the neutral earthing of C7 two capacitances in series, C6, two termination signal output port J2 after C7 two capacitances in series.
2. a kind of colliery according to claim 1 self diagnosis carbon monoxide transducer, is characterized in that: wireless module (112) is electrically connected with central processing unit (105).
3. a kind of colliery according to claim 1 and 2 self diagnosis carbon monoxide transducer, it is characterized in that: Carbon Monoxide Detection circuit, 1 pin of 1 pin and operational amplifier U8A that comprise carbon monoxide element U7 connects, 2 pins of U7 are connected to 6 pins of operational amplifier U8B through resistance R51, 3 pins of U7 are connected to 2 pins of operational amplifier U8A through resistance R41 and R42, polarity free capacitor C13 is connected with 1 pin of U7 and resistance R42 respectively, 2 pins of the S termination U7 of field effect transistor Q17, 3 pins of D termination U7, G end connects+3V3 power supply through resistance R49, 3 pins of U8A are connected through 6 pins of resistance R45 and U8B, the 4 pin ground connection of U8A, 8 pins of U8A connect+3V3 power supply, 5 pins of U8B connect 1V2 power supply through R55 resistance, the two ends of electric capacity C19 and resistance R50 form parallel relationship with 6 pins of U8B and 7 pins respectively, 1 pin of connection terminal P1 is connected through 7 pins of resistance R54 and U8B, resistance R56 one end ground connection, one end is connected with 1 pin of P1, electric capacity C24 and R56 is in parallel, 2 pins of P1 connect 1V2 power supply, 3 pins of P1 connect+3V3 power supply, the 4 pin ground connection of P1, 6 pins of high conductivity low leakage diode D6 mono-termination U8B, one termination 1V2 power supply, one termination+3V3 the power supply of polarity free capacitor C25, one end ground connection, voltage stabilizing diode U14 is through resistance R76 ground connection, another termination 1V2 power supply and resistance R59, R59 meets+3V3 power supply and polarity free capacitor C25, polarity free capacitor C14 positive pole connects+3V3 power supply, minus earth, polarity free capacitor C15 and C16 and C14 is in parallel.
4. the self-diagnosing method of a kind of colliery self diagnosis carbon monoxide transducer according to claim 1 or 2 or 3, be characterised in that: to the diagnosis of fault, first signal output type is judged, when PORT_CTRL1 is high (H) voltage, PORT_CTRL2 is low (L) voltage, when PORT_CTRL3 is low (L) voltage, for current mode exports; When PORT_CTRL1 is low (L) voltage, PORT_CTRL2 is low (L) voltage, when PORT_CTRL3 is low (L) voltage, for frequency type exports; When PORT_CTRL1 is any (X) voltage, PORT_CTRL2 is high (H) voltage, when PORT_CTRL3 is high (H) voltage, is that RS485 bus-type exports; When signal output type is current mode output, current mode open circuit LED light is bright is open circuit, and it is without open circuit that current mode open circuit LED light is extinguished, and be short circuit when current mode short circuit LED light is bright, the extinguishing of current mode short circuit LED light is without short circuit; When signal output type is frequency type output, frequency type open circuit LED light is bright is open circuit, and it is without open circuit that frequency type open circuit LED light is extinguished, and be short circuit when frequency type short circuit LED light is bright, the extinguishing of frequency type short circuit LED light is without short circuit; When signal output type is the output of RS485 bus-type, RS485 communication failure LED light lights communication failure, and RS485 communication failure LED light extinguishes communication normally.
5. the self-diagnosing method of a kind of colliery according to claim 4 self diagnosis carbon monoxide transducer, be characterised in that: be on trouble-free basis in above circuit judges, when Infrared remote controller is calibrated or adjusts the original state of colliery carbon monoxide transducer, cannot calibrate and maybe cannot adjust, think carbon monoxide component wear, otherwise carbon monoxide element is without damage.
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| CN203249905U (en) * | 2012-11-27 | 2013-10-23 | 煤炭科学研究总院沈阳研究院 | Self-diagnosis carbon monoxide sensor for coal mine |
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