CN102200455B - Sensor node capable of monitoring toxic and harmful gases in chemical industry park - Google Patents
Sensor node capable of monitoring toxic and harmful gases in chemical industry park Download PDFInfo
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- CN102200455B CN102200455B CN 201110136454 CN201110136454A CN102200455B CN 102200455 B CN102200455 B CN 102200455B CN 201110136454 CN201110136454 CN 201110136454 CN 201110136454 A CN201110136454 A CN 201110136454A CN 102200455 B CN102200455 B CN 102200455B
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- 239000000126 substance Substances 0.000 title claims abstract description 12
- 238000012544 monitoring process Methods 0.000 title claims abstract description 9
- 231100000331 toxic Toxicity 0.000 title claims abstract description 7
- 230000002588 toxic effect Effects 0.000 title claims abstract description 7
- 239000007789 gas Substances 0.000 title 1
- 238000004891 communication Methods 0.000 claims abstract description 35
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims description 67
- 239000003990 capacitor Substances 0.000 claims description 55
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 21
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 11
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 11
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 8
- 229910052744 lithium Inorganic materials 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 4
- 239000000460 chlorine Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000007726 management method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The present invention relates to a kind of sensor nodes that can be used for the monitoring of chemical industrial park toxic and harmful gas. The present invention includes power management module, controller module, detection module, communication module and data memory module. Power management module is controller module, detection module, communication module and data memory module power supply. Controller module is connect with detection module, communication module, data memory module, complete to temperature, humidity, air pressure,
Concentration,
Concentration,
The acquisition of the information such as concentration is handled, is stored and transmitted. Present device operation energy consumption is low, and power supply mode is flexible.
Description
Technical field
The invention belongs to wireless sensor network, embedded system technology field, be specifically related to a kind of sensor node that can be used for the monitoring of chemical industrial park toxic and harmful.
Background technology
In recent years, along with the sustained and rapid development of China's economy, the chemical industrial park of various places is surging forward, and produced simultaneously environmental problem also more and more receives people's attention.Real-time monitoring to chemical industrial park helps the protection to environment, helps the overall planning of government.
Wireless sensor network (Wireless Sensor Network; WSN) be exactly to form by being deployed in cheap microsensor nodes a large amount of in the monitored area; The network system of the self-organization of a multi-hop that forms through communication; Its objective is in the perception of cooperation ground, collection and the processing network's coverage area by the information of perceptive object, and send to the observer.
The ZigBee technology be a kind of closely, low complex degree, low-power consumption, low rate, double-direction radio mechanics of communication cheaply.Be mainly used in the application of carrying out data transmission between the various electronic equipments that distance is short, low in energy consumption and transfer rate is not high and periodic data, intermittent data and the transmission of low reaction time data typically being arranged.The ZigBee network is mainly set up for industry spot robotization control data transmission.
Summary of the invention
The invention provides a kind of sensor node equipment of gathering and handling parameter informations such as the airborne temperature of chemical industrial park, humidity, air pressure,
concentration,
concentration,
concentration; This equipment volume is little, cost is low, low in energy consumption, reliability is high.
Concrete technical scheme of the present invention is:
The sensor node that can be used for the monitoring of chemical industrial park toxic and harmful comprises power management module, controller module, detection module, communication module and data memory module.
Said power management module comprises that model is the 12V lithium battery of JS-12V-4.4AH; With the LM2596 voltage regulator is the 5V voltage conversion circuit of core; With the LM1117-3.3 voltage regulator is the 3.3V voltage conversion circuit of core, is core 1.8V voltage conversion circuit with the LM1117-1.8 voltage regulator.The lithium battery output voltage is supplied with transmitter, converts the 5V power supply to through voltage conversion circuit and supplies with detection module, 3.3V voltage conversion circuit.3.3V power supply is supplied with detection module, communication module, data memory module, controller module and 1.8V voltage conversion circuit.1.8V power supply is supplied with controller module.
Said controller module comprises that model is the controller of AT91SAM7S64.Controller module connects power module, monitoring modular, communication module and data memory module.
Said detection module comprises that model is the humiture transmitter of PC62; Model is the air pressure detection chip of MS5607; Model is the concentration of hydrogen sulfide transmitter of BG-EX-
; Model is BG-EX-
sulfur dioxide concentration transmitter; Model is BG-EX-
chlorine gas concentration transmitter and is the I/V change-over circuit of core with LM324AN.The transmitter input is connected with the I/V change-over circuit; The output of I/V change-over circuit is connected with controller AD interface; The air pressure detection chip is connected with controller SPI interface.
Said communication module comprises with MAX3232 being the RS-232 serial communication electric level interface change-over circuit of core, is connected with the UART interface of controller module, and the communication module power end is connected with the 3.3V voltage conversion circuit.
Said data memory module comprises that model is Flash and the SD_CARD storage of AT45DB161D, is connected with controller module SPI interface, and the data memory module power end is connected with the 3.3V voltage conversion circuit.
This node device can be realized the important parameter (temperature to the chemical industrial park atmospheric environment; Humidity; Air pressure;
concentration;
concentration;
concentration etc.) collection; Handle and transmission.With respect to prior art, have the following advantages:
(1) the present invention can gather multiple parameter simultaneously, comprises temperature, humidity, air pressure, concentration of hydrogen sulfide, sulfur dioxide concentration, chlorine gas concentration etc.
(2) the present device operation energy consumption is low, and power supply mode is flexible.Equipment adopts low power design technique, has reduced system energy consumption, but long-play; System's power supply can be selected battery or the power supply of two core power supplys.
(3) apparatus adaptability is strong.Each parts of node device all adopt the device that meets the technical grade standard; Under rugged surroundings, has stronger adaptability; And take into full account protection against the tide, anticorrosion, explosion-proof, and factor such as essential safety, adopt the design of degree of protection IP66, explosive-proof grade Ex ia IICT6.
Description of drawings:
Fig. 1 is a structural representation of the present invention;
Fig. 2 a, 2b, 2c are power management module schematic diagram of the present invention;
Fig. 3 is a controller module schematic diagram of the present invention;
Fig. 4 is a detection module schematic diagram of the present invention;
Fig. 5 is a communication module schematic diagram of the present invention;
Fig. 6 is a data memory module schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
As shown in Figure 1, the sensor node that can be used for the monitoring of chemical industrial park toxic and harmful comprises power management module, controller module, detection module, communication module and data memory module.Power management module is controller module, detection module, communication module and data memory module power supply.Controller module is connected with detection module, communication module, data memory module, accomplishes collection, processing, storage and transmission to information such as temperature, humidity, air pressure,
concentration,
concentration,
concentration.
Shown in Fig. 2 a, 2b and 2c, power management module comprises the 12V lithium battery, 5V voltage conversion circuit (Fig. 2 a), 3.3V voltage conversion circuit (Fig. 2 b), 1.8V voltage conversion circuit (Fig. 2 c).The model of 12V lithium battery is JS-12V-4.4AH, inserts the 5V voltage conversion circuit through JP6.Lithium battery anode connects 2 pins of JP6, and negative pole connects 1 pin of JP6.Capacitor C 13 positive poles connect 2 pins of JP6; Minus earth.(Fig. 2 core a) is that model is the voltage regulator of LM2596 to the 5V voltage conversion circuit.This voltage regulator 1 pin is an input pin, connects 2 pins of JP6; 2 pins are 5V voltage output pin; 3 pins and 5 pin ground connection; Inductance L of 4 pins series connection 1 connects the output of 5V voltage voltage conversion circuit.Diode D3 plus earth, negative pole connect 2 pins of LM2596 voltage regulator.Capacitor C 14 positive poles connect 2 pins of LM2596 voltage regulator, minus earth.Detection module, 3.3V voltage conversion circuit are supplied with in the output of 5V voltage conversion circuit.3.3V the core of voltage conversion circuit (Fig. 2 b) is a model is the voltage regulator of LM1117-3.3.2 pins of JP5 connect the output of 5V voltage conversion circuit; 1 pin connects 1 pin of voltage regulator.3 pins of J8 connect voltage regulator 1 pin; 1,2 pin ground connection.The positive pole of capacitor C 3, C4 connects 3 pins of J8, minus earth.Voltage regulator 2 pin ground connection; 3 pins are 3.3V voltage output pin.Capacitor C 2, anodal voltage regulator 3 pins, the minus earth of connecting of C6.3.3V air pressure detection chip, communication module, data memory module, controller module and 1.8V voltage conversion circuit are supplied with in the output of voltage conversion circuit.1.8V the core of voltage conversion circuit (Fig. 2 c) is a model is the voltage regulator of LM1117-1.8.Capacitor C 7, anodal voltage regulator 1 pin, the minus earth of connecting of C8.Voltage regulator 1 pin connects the output of 3.3V voltage conversion circuit; 2 pin ground connection; 3 pins are 1.8V voltage output pin.Capacitor C 9, C10 connect voltage regulator 3 pins.1.8V controller module is supplied with in the output of voltage conversion circuit.
As shown in Figure 3, the controller module core is that model is the controller of AT91SAM7S64.UART interface 34 pins of controller, 14 pins, 35 pins, 11 pins are connected with communication module.Controller AD interface 3 pins, 4 pins, 5 pins, 9 pins, 10 pins are connected with detection module.Controller 7 pins, 18 pins, 45 pins, 58 pins, 59 pins are connected with the output of 3.3V voltage conversion circuit.Controller 1 pin, 8 pins, 12 pins, 24 pins, 54 pins, 64 pins are connected with the output of 1.8V voltage conversion circuit.Controller 2 pins, 17 pins, 46 pins, 60 pin ground connection.Capacitor C 21, C22, C23, C24, the anodal output of 1.8V voltage conversion circuit, the minus earth of connecting of C25.Capacitor C 26, C27, C28, C29, C30, the anodal output of 3.3V voltage conversion circuit, the minus earth of connecting of C31.Reset circuit takes simple button to reset, and controller reset signal input pin 39 pins after S1 presses, are given the controller reset signal, the hand-reset controller through button S1 ground connection.
As shown in Figure 4, detection module comprises humiture transmitter, air pressure detection chip, concentration of hydrogen sulfide transmitter, sulfur dioxide concentration transmitter, chlorine gas concentration transmitter and I/V change-over circuit.I/V change-over circuit core devices model is LM324AN.Resistance R of 1 pin series connection 21 of I/V change-over circuit U4A connects controller 9 pins, and resistance R of 2 pins series connection 20 connects temperature input signal T1, and 1,3 pins link to each other, and 4 pins connect the output of 5V voltage conversion circuit, 11 pin ground connection.Resistance R 19 1 end ground connection, the other end connects temperature input signal T1.Capacitor C 15 positive poles connect 2 pins of I/V change-over circuit U4A, minus earth.Resistance R of 7 pins series connection 24 of I/V change-over circuit U4B connects controller 10 pins, and resistance R of 6 pins series connection 23 connects humidity input signal T2, and 5,7 pins link to each other, and 4 pins connect the output of 5V voltage conversion circuit, 11 pin ground connection.Resistance R 22 1 ends connect humidity input signal T2, other end ground connection.Capacitor C 16 anodal 6 pins that connect I/V change-over circuit U4B, minus earth.Resistance R of 8 pins series connection 27 of I/V change-over circuit U4C connects controller 3 pins, and resistance R of 9 pins series connection 26 connects the concentration of hydrogen sulfide input signal, and 8,10 pins link to each other, and 4 pins connect the output of 5V voltage conversion circuit, 11 pin ground connection.Resistance R 25 1 ends connect concentration of hydrogen sulfide input signal T3, other end ground connection.Capacitor C 17 anodal 9 pins that connect I/V change-over circuit U4C, minus earth.Resistance R of 14 pins series connection 30 of I/V change-over circuit U4D connects controller 4 pins, and resistance R of 13 pins series connection 29 connects sulfur dioxide concentration input signal T4, and 12,14 pins link to each other; 4 pins connect the output of 5V voltage conversion circuit, 11 pin ground connection.Resistance R 28 1 ends connect sulfur dioxide concentration input signal T4, other end ground connection.Capacitor C 18 anodal 13 pins that connect I/V change-over circuit U4D, minus earth.Resistance R of 7 pins series connection 33 of I/V change-over circuit U7B connects controller 5 pins, and resistance R of 6 pins series connection 32 connects chlorine gas concentration input signal T5, and 5,7 pins link to each other; 4 pins connect the output of 5V voltage conversion circuit, 11 pin ground connection.Resistance R 31 1 ends connect chlorine gas concentration input signal T5, other end ground connection.Capacitor C 19 anodal 6 pins that connect I/V change-over circuit U7B, minus earth.Air pressure detection chip model is MS5607, and 1 pin connects the output of 3.3V voltage conversion circuit, 2,3 pin ground connection; 4,5 pins connect controller 52 pins; 6 pins connect controller 27 pins, and 7 pins connect controller 22 pins, and 8 pins connect controller 21 pins.Capacitor C 20 positive poles connect the output of 3.3V voltage conversion circuit, minus earth.Humiture transmitter model is PC62, temperature range-20 ~+80 ℃, temperature accuracy ± 0.2 ℃, humidity range 0-100%RH, humidity precision < ± 2%RH.Concentration of hydrogen sulfide transmitter model is BG-EX-<img file=" 238444DEST_PATH_IMAGE002.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 34 " />; Range 0-100PPm, precision is < ± 2% (F.S).Sulfur dioxide concentration transmitter model is BG-EX-<img file=" 499661DEST_PATH_IMAGE004.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 30 " />; Range 0-100PPm, precision is < ± 2% (F.S).Chlorine gas concentration transmitter model is BG-EX-<img file=" 794638DEST_PATH_IMAGE006.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 25 " />; Range 0-20PPm, precision is < ± 2% (F.S).
As shown in Figure 5, communication module comprises with MAX3232 being the RS-232 serial communication electric level interface change-over circuit of core.The ZigBee module is connected with controller through RS-232 serial communication level shifting circuit.RS-232 serial communication level shifting circuit 1 pin connects capacitor C 32 positive poles; 2 pins connect capacitor C 34 positive poles, and the C34 negative pole connects 16 pins; 3 pins connect capacitor C 32 negative poles; 4 pins connect capacitor C 35 positive poles; 5 pins connect capacitor C 35 negative poles; 6 pin ground connection; 7 pins connect 2 pins of RS-232 joint COMB; 8 pins connect 3 pins of RS-232 joint COMB; 9 pins connect controller 11 pins; 10 pins connect controller 14 pins; 15 pins connect capacitor C 33 positive poles, C33 minus earth; 16 pins connect the output of 3.3V voltage conversion circuit.Capacitor C 36 anodal RS-232 serial communication level shifting circuit 16 pins, the C36 minus earths of connecting.The 5 pin ground connection of RS-232 joint COMB.
As shown in Figure 6, data memory module comprises that model is Flash and the SD_CARD storage of AT45DB161D.1 pin of Flash connects controller 22 pins; 2 pins connect controller 21 pins; 3,5,6 pins connect the output of 3.3V voltage conversion circuit; 4 pins connect 1 pin of JP3; 7 pin ground connection; 8 pins connect controller 27 pins.1 pin of SD_CARD connects 3 pins of JP3; 2 pins connect controller 22 pins; 4 pins connect power supply SD_VDD; 5 pins connect controller 21 pins; 7 pins connect controller 27 pins; 8, connect respectively resistance R 12, a R13 of 9 pins connects 13 pins; 3,6,12,14,15 pin ground connection.Resistance R 15 1 ends connect 1 pin of SD_CARD, and the other end connects power supply SD_VDD.Resistance R 16 1 ends connect 2 pins of SD_CARD, and the other end connects power supply SD_VDD.Resistance R 17 1 ends connect 5 pins of SD_CARD, and the other end connects power supply SD_VDD.Resistance R 18 1 ends connect 7 pins of SD_CARD, and the other end connects power supply SD_VDD.Resistance R 14 1 ends connect the output of 3.3V voltage conversion circuit, and the other end connects capacitor C 11 positive poles.Capacitor C 11 positive poles are drawn power supply SD_VDD, minus earth.2 pins of JP3 connect controller 28 pins.Select storage mode through JP3: when 1,2 pins of JP3 connect, select the Flash storage; When 2,3 pins of JP3 connect, select the SD_CARD storage.
The course of work of the present invention is: power module is controller module, detection module, communication module and data memory module power supply.Controller module is connected with detection module, communication module, data memory module, accomplishes collection, processing, storage and the transmission of information.Controller sends order detection starting module.Each sensor node that is distributed in the chemical industrial park passes through quality parameter informations such as transmitter collecting temperature, humidity, air pressure, concentration of hydrogen sulfide, sulfur dioxide concentration, chlorine gas concentration, after detection module is handled, is transferred to controller.Controller with the information processing that collects after, it is kept at data memory module, and realizes internodal information interaction through communication module.
Claims (1)
1. can be used for the sensor node of chemical industrial park toxic and harmful monitoring, comprise power management module, controller module, detection module, communication module and data memory module, it is characterized in that:
Power management module is controller module, detection module, communication module and data memory module power supply; Controller module is connected with detection module, communication module, data memory module, accomplishes temperature, humidity, air pressure, H
2S concentration, SO
2Concentration, Cl
2The collection of concentration information, processing, storage and transmission;
Described power management module comprises 12V lithium battery, 5V voltage conversion circuit, 3.3V voltage conversion circuit and 1.8V voltage conversion circuit; The 12V lithium battery inserts the 5V voltage conversion circuit through JP6; Lithium battery anode connects 2 pins of JP6, and negative pole connects 1 pin of JP6; Capacitor C 13 positive poles connect 2 pins of JP6; Minus earth; The core of 5V voltage conversion circuit is that model is the voltage regulator one of LM2596; 1 pin of this voltage regulator one is an input pin, connects 2 pins of JP6; 2 pins are 5V voltage conversion circuit output pin; 3 pins and 5 pin ground connection; Inductance L of 4 pins series connection 1 connects the output of 5V voltage conversion circuit; Diode D3 plus earth, negative pole connect 2 pins of voltage regulator one; Capacitor C 14 positive poles connect 2 pins of voltage regulator one, minus earth; Detection module and 3.3V voltage conversion circuit are supplied with in the output of 5V voltage conversion circuit; 3.3V the core of voltage conversion circuit is a model is the voltage regulator two of LM1117-3.3; 2 pins of JP5 connect the output of 5V voltage conversion circuit; 1 pin connects 1 pin of voltage regulator two; 3 pins of J8 connect 1 pin of voltage regulator two; 1,2 pin ground connection; The positive pole of capacitor C 3, C4 connects 3 pins of J8, minus earth; 2 pin ground connection of voltage regulator two; 3 pins are 3.3V voltage output pin; Capacitor C 2, anodal 3 pins that connect voltage regulator two of C6, minus earth; 3.3V air pressure detection chip, communication module, data memory module, controller module and 1.8V voltage conversion circuit are supplied with in the output of voltage conversion circuit; 1.8V the core of voltage conversion circuit is a model is the voltage regulator three of LM1117-1.8; Capacitor C 7, anodal 1 pin that connects voltage regulator three of C8, minus earth; 1 pin of voltage regulator three connects the output of 3.3V voltage conversion circuit; 2 pin ground connection; 3 pins are 1.8V voltage output pin; Capacitor C 9, C10 connect 3 pins of voltage regulator three; 1.8V controller module is supplied with in the output of voltage conversion circuit;
Described controller module core is that model is the controller of AT91SAM7S64; UART interface 34 pins of controller, 14 pins, 35 pins, 11 pins are connected with communication module; Controller AD interface 3 pins, 4 pins, 5 pins, 9 pins, 10 pins are connected with detection module; Controller 7 pins, 18 pins, 45 pins, 58 pins, 59 pins are connected with the output of 3.3V voltage conversion circuit; Controller 1 pin, 8 pins, 12 pins, 24 pins, 54 pins, 64 pins are connected with the output of 1.8V voltage conversion circuit; Controller 2 pins, 17 pins, 46 pins, 60 pin ground connection; Capacitor C 21, capacitor C 22, capacitor C 23, capacitor C 24, the capacitor C 25 anodal output of 1.8V voltage conversion circuit, the minus earths of connecting; Capacitor C 26, capacitor C 27, capacitor C 28, capacitor C 29, capacitor C 30, the capacitor C 31 anodal output of 3.3V voltage conversion circuit, the minus earths of connecting; Reset circuit takes simple button to reset, and controller reset signal input pin 39 pins after S1 presses, are given the controller reset signal, the hand-reset controller through button S1 ground connection;
Described detection module comprises humiture transmitter, air pressure detection chip, concentration of hydrogen sulfide transmitter, sulfur dioxide concentration transmitter, chlorine gas concentration transmitter and I/V change-over circuit; I/V change-over circuit core devices model is LM324AN; Resistance R of 1 pin series connection 21 of I/V change-over circuit U4A connects controller 9 pins, and resistance R of 2 pins series connection 20 connects temperature input signal T1, and 1,3 pins link to each other, and 4 pins connect the output of 5V voltage conversion circuit, 11 pin ground connection; Resistance R 19 1 end ground connection, the other end connects temperature input signal T1; Capacitor C 15 positive poles connect 2 pins of I/V change-over circuit U4A, minus earth; Resistance R of 7 pins series connection 24 of I/V change-over circuit U4B connects controller 10 pins, and resistance R of 6 pins series connection 23 connects humidity input signal T2, and 5,7 pins link to each other, and 4 pins connect the output of 5V voltage conversion circuit, 11 pin ground connection; Resistance R 22 1 ends connect humidity input signal T2, other end ground connection; Capacitor C 16 anodal 6 pins that connect I/V change-over circuit U4B, minus earth; Resistance R of 8 pins series connection 27 of I/V change-over circuit U4C connects controller 3 pins, and resistance R of 9 pins series connection 26 connects the concentration of hydrogen sulfide input signal, and 8,10 pins link to each other, and 4 pins connect the output of 5V voltage conversion circuit, 11 pin ground connection; Resistance R 25 1 ends connect concentration of hydrogen sulfide input signal T3, other end ground connection; Capacitor C 17 anodal 9 pins that connect I/V change-over circuit U4C, minus earth; Resistance R of 14 pins series connection 30 of I/V change-over circuit U4D connects controller 4 pins, and resistance R of 13 pins series connection 29 connects sulfur dioxide concentration input signal T4, and 12,14 pins link to each other; 4 pins connect the output of 5V voltage conversion circuit, 11 pin ground connection; Resistance R 28 1 ends connect sulfur dioxide concentration input signal T4, other end ground connection; Capacitor C 18 anodal 13 pins that connect I/V change-over circuit U4D, minus earth; Resistance R of 7 pins series connection 33 of I/V change-over circuit U7B connects controller 5 pins, and resistance R of 6 pins series connection 32 connects chlorine gas concentration input signal T5, and 5,7 pins link to each other; 4 pins connect the output of 5V voltage conversion circuit, 11 pin ground connection; Resistance R 31 1 ends connect chlorine gas concentration input signal T5, other end ground connection; Capacitor C 19 anodal 6 pins that connect I/V change-over circuit U7B, minus earth; Air pressure detection chip model is MS5607, and 1 pin connects the output of 3.3V voltage conversion circuit, 2,3 pin ground connection; 4,5 pins connect controller 52 pins; 6 pins connect controller 27 pins, and 7 pins connect controller 22 pins, and 8 pins connect controller 21 pins; Capacitor C 20 positive poles connect the output of 3.3V voltage conversion circuit, minus earth; Humiture transmitter model is PC62, and concentration of hydrogen sulfide transmitter model is BG-EX-H
2S, sulfur dioxide concentration transmitter model is BG-EX-SO
2, chlorine gas concentration transmitter model is BG-EX-Cl
2
Described communication module comprises with MAX3232 being the RS-232 serial communication electric level interface change-over circuit of core; The ZigBee module is connected with controller through RS-232 serial communication level shifting circuit; RS-232 serial communication level shifting circuit 1 pin connects capacitor C 32 positive poles; 2 pins connect capacitor C 34 positive poles, and the C34 negative pole connects 16 pins; 3 pins connect capacitor C 32 negative poles; 4 pins connect capacitor C 35 positive poles; 5 pins connect capacitor C 35 negative poles; 6 pin ground connection; 7 pins connect 2 pins of RS-232 joint COMB; 8 pins connect 3 pins of RS-232 joint COMB; 9 pins connect controller 11 pins; 10 pins connect controller 14 pins; 15 pins connect capacitor C 33 positive poles, C33 minus earth; 16 pins connect the output of 3.3V voltage conversion circuit; Capacitor C 36 anodal RS-232 serial communication level shifting circuit 16 pins, the C36 minus earths of connecting; The 5 pin ground connection of RS-232 joint COMB;
Described data memory module comprises that model is Flash and the SD_CARD storage of AT45DB161D; 1 pin of Flash connects controller 22 pins; 2 pins connect controller 21 pins; 3,5,6 pins connect the output of 3.3V voltage conversion circuit; 4 pins connect 1 pin of JP3; 7 pin ground connection; 8 pins connect controller 27 pins; 1 pin of SD_CARD connects 3 pins of JP3; 2 pins connect controller 22 pins; 4 pins connect power supply SD_VDD; 5 pins connect controller 21 pins; 7 pins connect controller 27 pins; 8, connect respectively resistance R 12, a R13 of 9 pins connects 13 pins; 3,6,12,14,15 pin ground connection; Resistance R 15 1 ends connect 1 pin of SD_CARD, and the other end connects power supply SD_VDD; Resistance R 16 1 ends connect 2 pins of SD_CARD, and the other end connects power supply SD_VDD; Resistance R 17 1 ends connect 5 pins of SD_CARD, and the other end connects power supply SD_VDD; Resistance R 18 1 ends connect 7 pins of SD_CARD, and the other end connects power supply SD_VDD; Resistance R 14 1 ends connect the output of 3.3V voltage conversion circuit, and the other end connects capacitor C 11 positive poles; Capacitor C 11 positive poles are drawn power supply SD_VDD, minus earth; 2 pins of JP3 connect controller 28 pins; Select storage mode through JP3: when 1,2 pins of JP3 connect, select the Flash storage; When 2,3 pins of JP3 connect, select the SD_CARD storage.
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| CN103760863B (en) * | 2014-01-21 | 2016-08-17 | 杭州电子科技大学 | Stench class gas based on sensor network and VOCs monitor system |
| CN103760864B (en) * | 2014-01-21 | 2016-08-17 | 杭州电子科技大学 | Stench class gas and VOCs monitoring node |
| CN104677428A (en) * | 2015-03-25 | 2015-06-03 | 徐新 | Multifunctional indoor air detection device |
| CN108746193A (en) * | 2018-07-25 | 2018-11-06 | 梧州市兴能农业科技有限公司 | Heavy metals in farmland pollutes on-line early warning system |
| CN109187619B (en) * | 2018-09-26 | 2021-04-27 | 南京工业大学 | Sulfur-related petrochemical equipment corrosion spontaneous combustion prediction method |
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| JPH07311134A (en) * | 1994-05-19 | 1995-11-28 | Omron Corp | Offensive odor-measuring instrument |
| CN202133422U (en) * | 2011-05-25 | 2012-02-01 | 杭州电子科技大学 | Sensor node for monitoring poisonous and harmful gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201417277Y (en) * | 2009-01-15 | 2010-03-03 | 北京燕山时代仪表有限公司 | Gas safety detection monitoring system |
| CN101929909A (en) * | 2009-06-18 | 2010-12-29 | 王世庆 | Gas leakage detector |
| CN101975751A (en) * | 2010-10-13 | 2011-02-16 | 重庆大学 | Embedded type harmful gas detection system |
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