CN203249905U - Self-diagnosis carbon monoxide sensor for coal mine - Google Patents
Self-diagnosis carbon monoxide sensor for coal mine Download PDFInfo
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- CN203249905U CN203249905U CN 201220635834 CN201220635834U CN203249905U CN 203249905 U CN203249905 U CN 203249905U CN 201220635834 CN201220635834 CN 201220635834 CN 201220635834 U CN201220635834 U CN 201220635834U CN 203249905 U CN203249905 U CN 203249905U
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Abstract
The utility model relates to a self-diagnosis carbon monoxide sensor for a coal mine. According to the self-diagnosis carbon monoxide sensor, an intrinsic safety power supply in an intrinsic safety casing is electrically connected with a battery conversion module and then electrically connected with a central processing unit, and the intrinsic safety power supply is further sequentially and electrically connected with a power supply conversion module, a carbon monoxide detection circuit and the central processing unit; the power supply conversion module is further electrically connected with an output port reuse circuit; the battery conversion module is electrically connected with the power supply conversion module; and the central processing unit is further in infrared connection with an infrared remote control unit and electrically connected with a display unit respectively. The self-diagnosis carbon monoxide sensor is characterized in that the central processing unit is electrically connected with and controls an output port reuse circuit of an RS485 communication module, a frequency output end and a current output end. The self-diagnosis carbon monoxide sensor realizes integration of multi-system output communication modes, simultaneously realizes self-diagnosis of open circuit, short circuit and communication signal failure states of current type, frequency type and RS485 bus type output circuits, and realizes self-diagnosis of a carbon monoxide element and information transmission.
Description
Technical field
The utility model belongs to the colliery sensor technical field, relates to the colliery carbon monoxide transducer, relates in particular to the carbon monoxide transducer that self diagnosis is used in the colliery.
Background technology
At present, the China's coal-mine safety monitoring system has been obtained tremendous development, but also there are some urgent problems, particularly in the information acquisition and transmission technology of Coal Mine Safety Monitoring System, restricted by wrong report, monitoring blind area, acquisition method backwardness, the factors such as short, intelligent degree of sensor adjustment cycle is not high, maintenance workload large, personnel's maloperation, had a strong impact on the reliability of coal mine safety monitoring system.Particularly existing colliery uses carbon monoxide transducer without substantive fault self-diagnosis function, especially without component wear degree, power work situation normal self-diagnostic function whether, only have cabled digital information transfer capability or frequency type signal transfer functions, have the signal wire fault to cause monitoring to interrupt the technical matters that produces wrong report etc.Central processing unit directly connects RS485 communication module or frequency output terminal or current output terminal, and the standard that adopt in present different mines does not coexist can cause when selecting and the situation such as do not mate, the self-diagnostic function imperfection of carbon monoxide transducer.
The utility model content
For the existing colliery existing technical matters of carbon monoxide transducer, increase its carbon monoxide transducer self-diagnosis function, provide a kind of can the self diagnosis component wear and power supply whether work, the opening 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.
The utility model wants the technical scheme of technical solution problem to be: a kind of colliery self diagnosis carbon monoxide transducer is provided, comprise: intrinsic safety electric source 101 is electrically connected battery modular converter 102 rear electrical connection central processing units 105 in the intrinsic safety shell, 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 also is electrically connected output port multiplex circuit 111, battery modular converter 102 electric connection of power supply modular converters 103, central processing unit 105 is also distinguished infrared connection Infrared remote controller 110, be electrically connected display module 109, characteristics are 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: wireless module 112 is electrically connected with central processing unit 105.
Wherein: output port multiplex circuit 111 comprises that 1 pin of gating switch U2 connects current output terminal 108,2 pin ground connection, 3 pins connect frequency output terminal 107,5 pins connect+the 5V voltage end, 6 pin PORT_CTRL1 are connected with 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 gating switch U3 is connected with the 485_A node of RS485 communication module, 2 pin ground connection, 6 pin PORT_CTRL2 are connected with the I/O mouth of central processing unit 105,5 pins connect+the 5V voltage end, 1 pin of gating switch U5 connects the 485_B node of RS485 communication module, 2,3 pin ground connection, 5 pins connect+the 5V voltage end, 6 pin PORT_CTRL3 are connected with the I/O mouth of central processing unit (105), after 4 pins of resistance R 9 and gating switch U3 are connected, 4 pins by diode D4 and gating switch U5, resistance R 15 is connected, resistance R 15 is connected by diode D5 with R9, capacitor C 6, difference connecting resistance R9 and R15 after the 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: the Carbon Monoxide Detection circuit comprises that 1 pin of carbon monoxide sensitive element U7 and 1 pin of operational amplifier U8A join, 2 pins of carbon monoxide sensitive element U7 are connected to 6 pins of operational amplifier U8B through resistance R 51,3 pins of carbon monoxide sensitive element U7 are connected to 2 pins of operational amplifier U8A through resistance R 41 and R42, polarity free capacitor C13 is connected with resistance R with 1 pin of carbon monoxide sensitive element U7 respectively and is connected, 2 pins of the S termination carbon monoxide sensitive element U7 of fet Q17,3 pins of D termination carbon monoxide sensitive element U7, the G end connects+the 3V3 power supply through resistance R 49,3 pins of operational amplifier U8A link to each other with 6 pins of operational amplifier U8B through resistance R 45, the 4 pin ground connection of operational amplifier U8A, 8 pins of operational amplifier U8A connect+the 3V3 power supply, 5 pins of operational amplifier U8B connect the 1V2 power supply through R55 resistance, the two ends of capacitor C 19 and resistance R 50 form relation in parallel with 6 pins and 7 pins of operational amplifier U8B respectively, 1 pin of connection terminal P1 links to each other with 7 pins of operational amplifier U8B through resistance R 54, resistance R 56 1 end ground connection, one end links to each other with 1 pin of connection terminal P1, capacitor C 24 is in parallel with resistance R 56,2 pins of connection terminal P1 connect the 1V2 power supply, 3 pins of connection terminal P1 connect+the 3V3 power supply, the 4 pin ground connection of connection terminal P1,6 pins of voltage stabilizing diode D6 one termination operational amplifier U8B, one termination 1V2 power supply, one termination of polarity free capacitor C25+3V3 power supply, one end ground connection, voltage stabilizing diode U14 is through resistance R 76 ground connection, another termination 1V2 power supply and resistance R 59, resistance R 59 connects+3V3 power supply and polarity free capacitor C25, polarity free capacitor C14 positive pole connects+the 3V3 power supply, minus earth, polarity free capacitor C15 and polarity free capacitor C16 with have polar capacitor C14 in parallel.
The beneficial effects of the utility model are: the utility model provides output port multiplex circuit 111, realized current mode, frequency type, RS485 bus-type output multimode communication mode is integrated, satisfy the demand of present coal mine safety monitoring system different systems, signal transmission can wired or wirelessly be exported, realized simultaneously infrared remote control, by the software programming of self-diagnosing method to central processing unit, realized that the utility model is to current mode, frequency type, opening circuit of RS485 bus-type output circuit, short circuit, the self diagnosis of communication signal malfunction has been realized self diagnosis and communication to the carbon monoxide element simultaneously.
Description of drawings
Fig. 1. the utility model the first example structure schematic diagram;
Fig. 2. the utility model power transfer module schematic diagram;
Fig. 3. the utility model Carbon Monoxide Detection circuit theory diagrams;
Fig. 4. the utility model RS485 communication module schematic diagram;
Fig. 5. the utility model output port multiplex circuit schematic diagram;
Fig. 6. the utility model display module schematic diagram;
Fig. 7. the utility model battery modular converter schematic diagram;
Fig. 8. the utility model the second example structure schematic diagram;
Fig. 9. the utility model wireless module schematic diagram.
Embodiment
Accompanying drawing number
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 is the number of pins of components and parts among the figure, 101. intrinsic safety electric sources, 102. battery modular converters, 103. power transfer module, 104. the Carbon Monoxide Detection circuit, 105. central processing units, 106. RS485 communication modules, 107. frequency output terminal, 108. current output terminal, 109. display modules, 110. Infrared remote controller, 111. the output port multiplex circuit, 112. wireless modules.
The first embodiment
In conjunction with Fig. 1. the utility model the first example structure schematic diagram, a kind of colliery self diagnosis carbon monoxide transducer, comprise: intrinsic safety electric source 101 is electrically connected battery modular converter 102 rear electrical connection central processing units 105 in the intrinsic safety shell, 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 also is electrically connected output port multiplex circuit 111, battery modular converter 102 electric connection of power supply modular converters 103, central processing unit 105 is also distinguished infrared connection Infrared remote controller 110, be electrically connected display module 109, characteristics are 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: central processing unit 105 is selected the STM32F103V8T6 model.
In conjunction with Fig. 2. the utility model power transfer module schematic diagram, wherein: power transfer module is general module, J1 connects the intrinsic safety electric source input port, + 10V connects battery modular converter input port, DC+ 9～24V power supply one tunnel is through the DC/DC transducer, be transformed into+5V for Carbon Monoxide Detection circuit 104 and output port multiplex circuit 111 by+5V power transfer module output port access, another road is through the DC/DC transducer, be transformed into+3.3V for central processing unit 105 by+3V3 power transfer module output port access.
In conjunction with Fig. 3. the utility model Carbon Monoxide Detection circuit, wherein: the Carbon Monoxide Detection circuit comprises that 1 pin of carbon monoxide sensitive element U7 and 1 pin of operational amplifier U8A join, 2 pins of carbon monoxide sensitive element U7 are connected to 6 pins of operational amplifier U8B through resistance R 51,3 pins of carbon monoxide sensitive element U7 are connected to 2 pins of operational amplifier U8A through resistance R 41 and R42, polarity free capacitor C13 is connected with resistance R with 1 pin of carbon monoxide sensitive element U7 respectively and is connected, 2 pins of the S termination carbon monoxide sensitive element U7 of fet Q17,3 pins of D termination carbon monoxide sensitive element U7, the G end connects+the 3V3 power supply through resistance R 49,3 pins of operational amplifier U8A link to each other with 6 pins of operational amplifier U8B through resistance R 45, the 4 pin ground connection of operational amplifier U8A, 8 pins of operational amplifier U8A connect+the 3V3 power supply, 5 pins of operational amplifier U8B connect the 1V2 power supply through R55 resistance, the two ends of capacitor C 19 and resistance R 50 form relation in parallel with 6 pins and 7 pins of operational amplifier U8B respectively, 1 pin of connection terminal P1 links to each other with 7 pins of operational amplifier U8B through resistance R 54, resistance R 56 1 end ground connection, one end links to each other with 1 pin of connection terminal P1, capacitor C 24 is in parallel with resistance R 56,2 pins of connection terminal P1 connect the 1V2 power supply, 3 pins of connection terminal P1 connect+the 3V3 power supply, the 4 pin ground connection of connection terminal P1,6 pins of voltage stabilizing diode D6 one termination operational amplifier U8B, one termination 1V2 power supply, one termination of polarity free capacitor C25+3V3 power supply, one end ground connection, voltage stabilizing diode U14 is through resistance R 76 ground connection, another termination 1V2 power supply and resistance R 59, resistance R 59 connects+3V3 power supply and polarity free capacitor C25, polarity free capacitor C14 positive pole connects+the 3V3 power supply, minus earth, polarity free capacitor C15 and polarity free capacitor C16 with have polar capacitor C14 in parallel.
In conjunction with Fig. 4. the utility model RS485 communication module schematic diagram, wherein: the RS485 communication module is general module, U4 is low-power consumption RS485 transceiver, selects the MAX3485 model, finishes the transmission of information.
In conjunction with Fig. 5. the utility model output port multiplex circuit schematic diagram, wherein: output port multiplex circuit 111 comprises that 1 pin of gating switch U2 connects current output terminal 108,2 pin ground connection, 3 pins connect frequency output terminal 107,5 pins connect+the 5V voltage end, 6 pin PORT_CTRL1 are connected with 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 gating switch U3 is connected with the 485_A node of RS485 communication module, 2 pin ground connection, 6 pin PORT_CTRL2 are connected with the I/O mouth of central processing unit 105,5 pins connect+the 5V voltage end, 1 pin of gating switch U5 connects the 485_B node of RS485 communication module, 2,3 pin ground connection, 5 pins connect+the 5V voltage end, 6 pin PORT_CTRL3 are connected with the I/O mouth of central processing unit 105, after 4 pins of resistance R 9 and gating switch U3 are connected, 4 pins by diode D4 and gating switch U5, resistance R 15 is connected, resistance R 15 is connected by diode D5 with R9, capacitor C 6, difference connecting resistance R9 and R15 after the 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.
In conjunction with Fig. 6. the utility model display module schematic diagram, wherein: display module is general module, adopts general high brightness eight segment numeral pipes, shows numerical value.
In conjunction with Fig. 7. the utility model battery modular converter schematic diagram, wherein: the battery modular converter is general module.
The second embodiment
In conjunction with Fig. 8. the utility model the second example structure schematic diagram, a kind of colliery self diagnosis carbon monoxide transducer, comprise: intrinsic safety electric source 101 is electrically connected battery modular converter 102 rear electrical connection central processing units 105 in the intrinsic safety shell, 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 also is electrically connected output port multiplex circuit 111, battery modular converter 102 electric connection of power supply modular converters 103, central processing unit 105 is also distinguished infrared connection Infrared remote controller 110, be electrically connected display module 109, characteristics are 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 also is electrically connected wireless module 112.
Wherein: central processing unit 105 is selected the STM32F103V8T6 model.
In conjunction with Fig. 2. the utility model power transfer module schematic diagram, wherein: power transfer module is general module, J1 connects the intrinsic safety electric source input port, + 10V connects battery modular converter input port, DC+ 9～24V power supply one tunnel is through the DC/DC transducer, be transformed into+5V for Carbon Monoxide Detection circuit 104 and output port multiplex circuit 111 by+5V power transfer module output port access, another road is through the DC/DC transducer, be transformed into+3.3V for central processing unit 105 by+3V3 power transfer module output port access.
In conjunction with Fig. 3. the utility model Carbon Monoxide Detection circuit, wherein: the Carbon Monoxide Detection circuit comprises that 1 pin of carbon monoxide sensitive element U7 and 1 pin of operational amplifier U8A join, 2 pins of carbon monoxide sensitive element U7 are connected to 6 pins of operational amplifier U8B through resistance R 51,3 pins of carbon monoxide sensitive element U7 are connected to 2 pins of operational amplifier U8A through resistance R 41 and R42, polarity free capacitor C13 is connected with resistance R with 1 pin of carbon monoxide sensitive element U7 respectively and is connected, 2 pins of the S termination carbon monoxide sensitive element U7 of fet Q17,3 pins of D termination carbon monoxide sensitive element U7, the G end connects+the 3V3 power supply through resistance R 49,3 pins of operational amplifier U8A link to each other with 6 pins of operational amplifier U8B through resistance R 45, the 4 pin ground connection of operational amplifier U8A, 8 pins of operational amplifier U8A connect+the 3V3 power supply, 5 pins of operational amplifier U8B connect the 1V2 power supply through R55 resistance, the two ends of capacitor C 19 and resistance R 50 form relation in parallel with 6 pins and 7 pins of operational amplifier U8B respectively, 1 pin of connection terminal P1 links to each other with 7 pins of operational amplifier U8B through resistance R 54, resistance R 56 1 end ground connection, one end links to each other with 1 pin of connection terminal P1, capacitor C 24 is in parallel with resistance R 56,2 pins of connection terminal P1 connect the 1V2 power supply, 3 pins of connection terminal P1 connect+the 3V3 power supply, the 4 pin ground connection of connection terminal P1,6 pins of voltage stabilizing diode D6 one termination operational amplifier U8B, one termination 1V2 power supply, one termination of polarity free capacitor C25+3V3 power supply, one end ground connection, voltage stabilizing diode U14 is through resistance R 76 ground connection, another termination 1V2 power supply and resistance R 59, resistance R 59 connects+3V3 power supply and polarity free capacitor C25, polarity free capacitor C14 positive pole connects+the 3V3 power supply, minus earth, polarity free capacitor C15 and polarity free capacitor C16 with have polar capacitor C14 in parallel.
In conjunction with Fig. 4. the utility model RS485 communication module schematic diagram, wherein: the RS485 communication module is general module, U4 is low-power consumption RS485 transceiver, selects the MAX3485 model, finishes the transmission of information.
In conjunction with Fig. 5. the utility model output port multiplex circuit schematic diagram, wherein: output port multiplex circuit 111 comprises that 1 pin of gating switch U2 connects current output terminal 108,2 pin ground connection, 3 pins connect frequency output terminal 107,5 pins connect+the 5V voltage end, 6 pin PORT_CTRL1 are connected with 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 gating switch U3 is connected with the 485_A node of RS485 communication module, 2 pin ground connection, 6 pin PORT_CTRL2 are connected with the I/O mouth of central processing unit 105,5 pins connect+the 5V voltage end, 1 pin of gating switch U5 connects the 485_B node of RS485 communication module, 2,3 pin ground connection, 5 pins connect+the 5V voltage end, 6 pin PORT_CTRL3 are connected with the I/O mouth of central processing unit 105, after 4 pins of resistance R 9 and gating switch U3 are connected, 4 pins by diode D4 and gating switch U5, resistance R 15 is connected, resistance R 15 is connected by diode D5 with R9, capacitor C 6, difference connecting resistance R9 and R15 after the 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.
In conjunction with Fig. 6. the utility model display module schematic diagram, wherein: display module is general module, adopts general high brightness eight segment numeral pipes, shows numerical value.
In conjunction with Fig. 7. the utility model battery modular converter schematic diagram, wherein: the battery modular converter is general module.
In conjunction with Fig. 9. the utility model wireless module schematic diagram, wherein: wireless module is general module, the chip that Wireless Data Transmission adopts is the NRF24L01 type that Nordic Semiconductor company produces, and uses the open ISM band in the 2.4GHz whole world.
[0028]Introduce principle of work of the present utility model for ease of understanding: according to the signal output type of the present coal mine safety monitoring system that uses in mine, determine to use current mode output or frequency type output or the output of RS485 bus-type, adopt Infrared remote controller setting signal output type, corresponding to after the output terminal access, the Infrared remote controller calibration is also adjusted original state of the present utility model, when wire signal is normal, use wired output signal type, when wire signal interrupts, self-starting wireless signal output form.To the self-diagnosing method of the opening circuit of current mode, frequency type, RS485 bus-type output circuit, short circuit, communication signal malfunction referring to the introduction of following a kind of colliery with the self-diagnosing method of self diagnosis carbon monoxide transducer.
Introduce the self-diagnosing method that the self diagnosis carbon monoxide transducer is used in the colliery for ease of understanding at this.
A kind of colliery with the self-diagnosing method of self diagnosis carbon monoxide transducer is: to the diagnosis of fault, at first judge the signal output type, when PORT_CTRL1 is high (H) voltage, PORT_CTRL2 is low (L) voltage, when PORT_CTRL3 is low (L) voltage, be current mode output; When PORT_CTRL1 is low (L) voltage, PORT_CTRL2 is low (L) voltage, when PORT_CTRL3 is low (L) voltage, is frequency type output; When PORT_CTRL1 is any (X) voltage, PORT_CTRL2 be high (H) voltage, when PORT_CTRL3 be height (H) voltage, is that the RS485 bus-type is exported; When the signal output type is current mode when output, the current mode LED light that opens circuit is bright for opening circuit, and the current mode LED light that opens circuit is extinguished as without opening circuit, and is short circuit when current mode short circuit LED light is bright, and current mode short circuit LED light is extinguished as without short circuit; When the signal output type is frequency type when output, the frequency type LED light that opens circuit is bright for opening circuit, and the frequency type LED light that opens circuit is extinguished as without opening circuit, and is short circuit when frequency type short circuit LED light is bright, and frequency type short circuit LED light is extinguished as without short circuit; When the signal output type was the output of RS485 bus-type, RS485 communication failure LED light was lighted communication failure, and RS485 communication failure LED light is extinguished communication normally.
The self-diagnosing method of carbon monoxide element is: be on the trouble-free basis in above circuit judges, when the original state of self diagnosis carbon monoxide transducer is used in Infrared remote controller calibration or adjustment colliery, can't calibrate maybe and can't adjust, think the carbon monoxide component wear, otherwise the carbon monoxide element is without damage.
Realized thus whether normally the opening circuit of the utility model self, short circuit, communication diagnosis is carried out self diagnosis to the carbon monoxide component wear simultaneously, and diagnostic message is transmitted.
Claims (5)
1. colliery self diagnosis carbon monoxide transducer, comprise that intrinsic safety electric source (101) is electrically connected central processing unit (105) after being electrically connected battery modular converter (102) in the intrinsic safety shell, 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) also is electrically connected output port multiplex circuit (111), battery modular converter (102) electric connection of power supply modular converter (103), central processing unit (105) is also distinguished infrared connection Infrared remote controller (110), be electrically connected display module (109), it is characterized in 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).
2. a kind of colliery according to claim 1 self diagnosis carbon monoxide transducer, it is characterized in that: wireless module (112) is electrically connected with central processing unit (105).
3. a kind of colliery according to claim 1 self diagnosis carbon monoxide transducer, it is characterized in that: output port multiplex circuit (111) comprises that 1 pin of gating switch U2 connects current output terminal (108), 2 pin ground connection, 3 pins connect frequency output terminal (107), 5 pins connect+the 5V voltage end, 6 pin PORT_CTRL1 are connected with 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 gating switch U3 is connected with the 485_A node of RS485 communication module, 2 pin ground connection, 6 pin PORT_CTRL2 are connected with the I/O mouth of central processing unit (105), 5 pins connect+the 5V voltage end, 1 pin of gating switch U5 connects the 485_B node of RS485 communication module, 2,3 pin ground connection, 5 pins connect+the 5V voltage end, 6 pin PORT_CTRL3 are connected with the I/O mouth of central processing unit (105), after 4 pins of resistance R 9 and gating switch U3 are connected, 4 pins by diode D4 and gating switch U5, resistance R 15 is connected, resistance R 15 is connected by diode D5 with R9, capacitor C 6, difference connecting resistance R9 and R15 after the 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.
4. a kind of colliery according to claim 2 self diagnosis carbon monoxide transducer, it is characterized in that: output port multiplex circuit (111) comprises that 1 pin of gating switch U2 connects current output terminal (108), 2 pin ground connection, 3 pins connect frequency output terminal (107), 5 pins connect+the 5V voltage end, 6 pin PORT_CTRL1 are connected with 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 gating switch U3 is connected with the 485_A node of RS485 communication module, 2 pin ground connection, 6 pin PORT_CTRL2 are connected with the I/O mouth of central processing unit (105), 5 pins connect+the 5V voltage end, 1 pin of gating switch U5 connects the 485_B node of RS485 communication module, 2,3 pin ground connection, 5 pins connect+the 5V voltage end, 6 pin PORT_CTRL3 are connected with the I/O mouth of central processing unit (105), after 4 pins of resistance R 9 and gating switch U3 are connected, 4 pins by diode D4 and gating switch U5, resistance R 15 is connected, resistance R 15 is connected by diode D5 with R9, capacitor C 6, difference connecting resistance R9 and R15 after the 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.
5. according to claim 1 and 2 or 3 or 4 described a kind of colliery self diagnosis carbon monoxide transducers, it is characterized in that: the Carbon Monoxide Detection circuit comprises that 1 pin of carbon monoxide sensitive element U7 and 1 pin of operational amplifier U8A join, 2 pins of carbon monoxide sensitive element U7 are connected to 6 pins of operational amplifier U8B through resistance R 51,3 pins of carbon monoxide sensitive element U7 are connected to 2 pins of operational amplifier U8A through resistance R 41 and R42, polarity free capacitor C13 is connected with resistance R with 1 pin of carbon monoxide sensitive element U7 respectively and is connected, 2 pins of the S termination carbon monoxide sensitive element U7 of fet Q17,3 pins of D termination carbon monoxide sensitive element U7, the G end connects+the 3V3 power supply through resistance R 49,3 pins of operational amplifier U8A link to each other with 6 pins of operational amplifier U8B through resistance R 45, the 4 pin ground connection of operational amplifier U8A, 8 pins of operational amplifier U8A connect+the 3V3 power supply, 5 pins of operational amplifier U8B connect the 1V2 power supply through R55 resistance, the two ends of capacitor C 19 and resistance R 50 form relation in parallel with 6 pins and 7 pins of operational amplifier U8B respectively, 1 pin of connection terminal P1 links to each other with 7 pins of operational amplifier U8B through resistance R 54, resistance R 56 1 end ground connection, one end links to each other with 1 pin of connection terminal P1, capacitor C 24 is in parallel with resistance R 56,2 pins of connection terminal P1 connect the 1V2 power supply, 3 pins of connection terminal P1 connect+the 3V3 power supply, the 4 pin ground connection of connection terminal P1,6 pins of voltage stabilizing diode D6 one termination operational amplifier U8B, one termination 1V2 power supply, one termination of polarity free capacitor C25+3V3 power supply, one end ground connection, voltage stabilizing diode U14 is through resistance R 76 ground connection, another termination 1V2 power supply and resistance R 59, resistance R 59 connects+3V3 power supply and polarity free capacitor C25, polarity free capacitor C14 positive pole connects+the 3V3 power supply, minus earth, polarity free capacitor C15 and polarity free capacitor C16 with have polar capacitor C14 in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220635834 CN203249905U (en) | 2012-11-27 | 2012-11-27 | Self-diagnosis carbon monoxide sensor for coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220635834 CN203249905U (en) | 2012-11-27 | 2012-11-27 | Self-diagnosis carbon monoxide sensor for coal mine |
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| Publication Number | Publication Date |
|---|---|
| CN203249905U true CN203249905U (en) | 2013-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220635834 Withdrawn - After Issue CN203249905U (en) | 2012-11-27 | 2012-11-27 | Self-diagnosis carbon monoxide sensor for coal mine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967690A (en) * | 2012-11-27 | 2013-03-13 | 煤炭科学研究总院沈阳研究院 | Self-diagnosis carbon monoxide sensor for coal mine and self-diagnosis method |
-
2012
- 2012-11-27 CN CN 201220635834 patent/CN203249905U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967690A (en) * | 2012-11-27 | 2013-03-13 | 煤炭科学研究总院沈阳研究院 | Self-diagnosis carbon monoxide sensor for coal mine and self-diagnosis method |
| CN102967690B (en) * | 2012-11-27 | 2015-10-14 | 煤炭科学研究总院沈阳研究院 | Colliery self diagnosis carbon monoxide transducer and self-diagnosing method |
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