CN103196956A - System for detecting gas concentration throughout the space - Google Patents
System for detecting gas concentration throughout the space Download PDFInfo
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- CN103196956A CN103196956A CN2013100665551A CN201310066555A CN103196956A CN 103196956 A CN103196956 A CN 103196956A CN 2013100665551 A CN2013100665551 A CN 2013100665551A CN 201310066555 A CN201310066555 A CN 201310066555A CN 103196956 A CN103196956 A CN 103196956A
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Abstract
The invention relates to a system for detecting gas concentration throughout the space. The system comprises a positioning basis point, a detection terminal, and a gas sensor, a communication equipment of a monitoring centre and a computer arranged on the detection terminal, wherein the detection terminal receives radio-frequency signals emitted by the positioning basis point, calculating current position coordinates of the detection terminal according to an attenuation degree of the signals and the coordinates of the positioning basis point, detecting a gas concentration according to the gas sensor of the detection terminal, converting the concentration signals into electrical signals, sending information of the position coordinates and gas concentration to the communication equipment of the monitoring centre in a wireless way by the detection terminal, and then sending the information to the computer by the communication equipment of the monitoring centre. The system for detecting the gas concentration throughout the space uses a detection apparatus of such design, can conveniently detect and record gas concentration throughout the space, and accurately determine corresponding positions, thereby conveniently transmitting and summarizing detection results.
Description
Technical field
The present invention relates to measure position and the gas concentration of certain point, especially a kind of for detection of the detection system of gas concentration everywhere in the space.
Background technology
At present, known gas detecting instrument partly is made up of sensor, signal processing circuit, power supply etc., and what have also has for information storage, communication, the accessory that shows.Such gas detecting instrument generally is used for the detection of certain point, can not detect, record gas concentration everywhere in certain spatial dimension easily.
Summary of the invention
The technical problem to be solved in the present invention is: existing gas detecting instrument can not detect easily in order to overcome, the record space deficiency of gas concentration everywhere, provide a kind of for detection of the detection system of gas concentration everywhere in the space, can detect the concentration of gas, can also determine corresponding position, and testing result can be transmitted, gathered.
The technical solution adopted for the present invention to solve the technical problems is: a kind of for detection of the detection system of gas concentration everywhere in the space, comprise for determining the position and can sending the setting base of radiofrequency signal, survey terminal and be located at gas sensor and the monitoring center's communication facilities of surveying on the terminal, the frequency that described detection terminal reception setting base sends is penetrated signal, go out to survey the current position coordinates of terminal according to the attenuation degree of signal and the coordinate Calculation of setting base, detect gas concentration by the gas sensor of surveying on the terminal, concentration signal is changed into electric signal, and through signal processing circuit, the detection terminal sends to the information of position coordinates and gas concentration on monitoring center's communication facilities by wireless mode, monitoring center's communication facilities is transferred to computing machine with information, computing machine carries out record, handle, the concentration of gas everywhere in the display space, computing machine can be used ordinary individual's computing machine, portable notebook computer, industrial computer, smart mobile phone, panel computer.
The transfer mode that the information transmission is adopted between described setting base and the detection terminal is: wireless transmission.
The transmission mode that the information transmission is adopted between described setting base and the monitoring center's communication facilities is: wire transmission or wireless transmission.
The transmission mode that the information transmission is adopted between described monitoring center communication facilities and the computing machine is: wire transmission or wireless transmission.
Wireless transmission is ZigBee transmission, Wi-Fi transmission or Bluetooth transmission; Wire transmission is RS232 transmission, USB transmission or Ethernet transmission.
Have the CC2430 module in the setting base, utilize CC2430 to realize the ZigBee radio communication, and the information of transmitting-receiving is handled, and then store the position coordinates of this setting base.
The power supply of surveying the CC2431 module that comprises grafting in the terminal and the signal processing circuit that is connected with the CC2431 module and being connected with signal processing circuit, the CC2431 module comprises antenna and realizes the circuit of radio communication function and the circuit of calculating location coordinate, the hardware positioning engine that the CC2431 module is used for the calculating location coordinate is based on receiving signal intensity indication technology, calculates the present position coordinate according to the ZigBee signal intensity that receives and known setting base position coordinates.
The CC2430 module that monitoring center's communication facilities comprises grafting and the usb communication circuit that is connected with the CC2430 module and with the power supply that is connected of usb communication circuit, the ZigBee signal that the detection terminal that monitoring center's communication facilities will receive is sent is converted to usb signal and is transferred to computing machine, and the usb signal that computing machine sends is converted to the ZigBee signal sends to setting base.
The invention has the beneficial effects as follows: described a kind of for detection of the detection system of gas concentration everywhere in the space, adopt the detecting instrument of this kind design, can detect easily, the record space concentration of gas everywhere, and can determine corresponding position accurately, thereby can easily testing result be transmitted and gather.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is of the present invention a kind of for detection of the one-piece construction block diagram of the detection system of gas concentration everywhere in the space;
Fig. 2 is the circuit theory diagrams of surveying terminal among Fig. 1;
Fig. 3 is the workflow diagram of surveying terminal among Fig. 1;
Fig. 4 is of the present invention a kind of for detection of the CC2430 that uses in the detection system of gas concentration everywhere in the space and the circuit theory diagrams of CC2431 module;
Fig. 5 is the circuit theory diagrams of monitoring center's communication facilities among Fig. 1.
Accompanying drawing acceptance of the bid keep the score state as follows: 1, setting base, 2, survey terminal, 21, the CC2431 module, 22, signal processing circuit, 23, survey power supply, 3, monitoring center's communication facilities, 31, the CC2430 module, 32, the usb communication circuit, 33, communication power supply, 4, gas sensor, 5, computing machine.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the synoptic diagram of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
As shown in Figure 1 a kind of for detection of the detection system of gas concentration everywhere in the space, comprise for determining the position and can sending the setting base 1 of radiofrequency signal, survey terminal 2, be located at gas sensor 4 and monitoring center's communication facilities 3 and the computing machine 5 surveyed on the terminal 2, the frequency that detection terminal 2 reception setting bases send is penetrated signal, go out to survey the current position coordinates of terminal according to the attenuation degree of signal and the coordinate Calculation of setting base 1, detect gas concentration by the gas sensor of surveying on the terminal 24, concentration signal is changed into electric signal, and through the signal processing circuit processing, detection terminal 2 sends to the information of position coordinates and gas concentration on monitoring center's communication facilities 3 by wireless mode, monitoring center's communication facilities 3 is transferred to computing machine 5 with information, and computing machine 5 carries out record, handle, the concentration of gas everywhere in the display space.
A kind of for detection of the detection system of gas concentration everywhere in the space shown in Fig. 2 and 3, the detection power supply 22 of surveying terminal the CC2431 module 21 that comprises grafting and the signal processing circuit that is connected with CC2431 module 21 and being connected with signal processing circuit, CC2431 module 21 comprises antenna and realizes the circuit of radio communication function and the circuit of calculating location coordinate, in the detection terminal two gas sensors 4 are arranged, can survey two kinds of gases, gas sensor 4 adopts MQ serial gas sensor, MQ serial gas sensor has similar detection principle and identical external pin, has replaceability, the MQ sensor of different model can be surveyed different types of gas, and the sensitive material of MQ serial gas sensor is active very high metal-oxide semiconductor (MOS).When metal-oxide semiconductor (MOS) is heated to uniform temperature in air, oxygen atom is attracted to electronegative semiconductor surface, the electronics of semiconductor surface can be transferred on the adsorb oxygen, oxygen atom has just become negative oxygen ion, form a positive space charge layer at semiconductor surface simultaneously, cause surface barrier to raise, flow thereby hinder electronics.In sensitive material inside, the binding site (crystal boundary) that free electron must pass the metal-oxide semiconductor (MOS) micrinite could form electric current.The potential barrier that is produced by oxygen absorption is present in crystal boundary equally and hinders flowing freely of electronics, and the resistance of sensor is namely because of this potential barrier.When sensor ran into reducibility gas, negative oxygen ion was because causing its surface concentration to reduce with reducibility gas generation redox reaction under condition of work, and potential barrier decreases, and causes the resistance of sensor to reduce.It is the change in resistance that the MQ sensor can be converted to the concentration information of gas resistance, the principle of signal processing circuit utilization series connection dividing potential drop, the variation of resistance of sensor is converted to power supply signal, power supply mainly comprises the SPX1117-3.3V chip for stabilized supply voltage, be used to indicate the pilot lamp of power supply status, for the button that resets, when surveying terminal works, the MQ sensor is converted to sensor resistance with gas concentration to be changed, signal processing circuit is converted to voltage signal with resistance, and the CC2431 chip on the CC2431 module 21 carries out analog to digital conversion in inside with voltage signal.
As shown in Figure 4 a kind of for detection of the detection system of gas concentration everywhere in the space, CC2431 module major part is a CC2431 chip.CC2431 is the SOC (system on a chip) solution of the band hardware positioning engine of TI company production, can satisfy the application needs of low-power consumption ZigBee wireless sensor network.The CC2431 chip internal comprises programmable 8051 MCU kernel, the module of handling the ZigBee radio communication, the hardware positioning engine of calculating location coordinate etc.The CC2431 module comprises be used to the auxiliary element of keeping CC2431 chip operate as normal, comprises crystal oscillator, electric capacity of voltage regulation etc.; Module has contact pin, so that be connected with other parts of circuit, the hardware positioning engine that the CC2431 module is used for the calculating location coordinate is based on receiving signal intensity indication technology, calculates the present position coordinate according to the ZigBee signal intensity that receives and known setting base position coordinates.
Have the CC2430 module in the setting base, the CC2430 chip internal comprises programmable 8051 MCU kernel and handles the module etc. of ZigBee radio communication, but do not have the hardware positioning engine of calculating location coordinate.Utilize CC2430 can realize the ZigBee radio communication, and to the information processing of transmitting-receiving, store the position coordinates of this setting base.CC2430 is identical with the peripheral circuit of CC2431, so the CC2430 module can use the different chip of identical PCB bare board welding to make with the CC2431 module.The CC2430 module comprises be used to the auxiliary element of keeping CC2430 chip operate as normal, comprises crystal oscillator, electric capacity of voltage regulation etc.; Module has contact pin, so that be connected with other circuit; These parts are identical with the CC2431 module, utilize CC2430 to realize the ZigBee radio communication, and the information of transmitting-receiving is handled, and then store the position coordinates of this setting base, and the setting base broadcast (sites) in turn sends the position coordinates of this basic point.When receiving the ZigBee signal of monitoring center's communication facilities transmission, according to the basic point position coordinates of the modification of signal oneself that receives.
As shown in Figure 5 a kind of for detection of the detection system of gas concentration everywhere in the space, the CC2430 module 31 that monitoring center's communication facilities comprises grafting and the usb communication circuit 32 that is connected with CC2430 module 31 and with the communication power supply that is connected 33 of usb communication circuit 32, the usb communication circuit uses the PL2303 chip to realize communication function.PL2303 is the integrated RS232-USB interface convertor of a kind of height that Prolific company produces, and can provide a RS232 full duplex asynchronous serial communication device and USB functional interface the convenient solution that connects.This device internal USB function control device, USB transceiver, oscillator and have the UART of whole modem control signals, the ZigBee signal that the detection terminal that monitoring center's communication facilities will receive is sent is converted to usb signal and is transferred to computing machine, and the usb signal that computing machine sends is converted to the ZigBee signal sends to setting base.
Be enlightenment with above-mentioned foundation desirable embodiment of the present invention, by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the instructions, must determine its technical scope according to the claim scope.
Claims (8)
1. one kind for detection of the detection system of gas concentration everywhere in the space, it is characterized in that: comprise for determining the position and can sending the setting base (1) of radiofrequency signal, survey terminal (2), be located at gas sensor (4) and monitoring center's communication facilities (3) and the computing machine (5) surveyed on the terminal (2), the frequency that described detection terminal (2) reception setting base (1) sends is penetrated signal, go out to survey the current position coordinates of terminal (2) according to the attenuation degree of signal and the coordinate Calculation of setting base (1), detect gas concentration by the gas sensor of surveying on the terminal (2) (4), concentration signal is changed into electric signal, and through signal processing circuit, detection terminal (2) sends to the information of position coordinates and gas concentration on monitoring center's communication facilities (3) by wireless mode, monitoring center's communication facilities (3) is transferred to computing machine (5) with information, and computing machine (5) carries out record, handle, the concentration of gas everywhere in the display space.
2. according to claim 1 a kind of for detection of the detection system of gas concentration everywhere in the space, it is characterized in that: described setting base (1) and survey the transfer mode that the information transmission is adopted between the terminal (2) and be: wireless transmission.
3. according to claim 1 a kind of for detection of the detection system of gas concentration everywhere in the space, it is characterized in that: the transmission mode that the information transmission is adopted between described setting base (1) and the monitoring center's communication facilities (3) is: wire transmission or wireless transmission.
4. according to claim 1 a kind of for detection of the detection system of gas concentration everywhere in the space, it is characterized in that: the transmission mode that the information transmission is adopted between described monitoring center communication facilities (3) and the computing machine (5) is: wire transmission or wireless transmission.
5. according to claim 2 or 3 or 4 described a kind of for detection of the detection system of gas concentration everywhere in the space, it is characterized in that: wireless transmission is ZigBee transmission, Wi-Fi transmission or Bluetooth transmission; Wire transmission is RS232 transmission, USB transmission or Ethernet transmission.
6. according to claim 1 a kind of for detection of the detection system of gas concentration everywhere in the space, it is characterized in that: have CC2430 module (31) in the setting base (1), utilize CC2430 to realize the ZigBee radio communication, and the information of transmitting-receiving handled, and then store the position coordinates of this setting base.
7. according to claim 1 a kind of for detection of the detection system of gas concentration everywhere in the space, it is characterized in that: the detection power supply (23) of surveying terminal (2) the CC2431 module (21) that comprises grafting and the signal processing circuit that is connected with CC2431 module (22) and being connected with signal processing circuit, CC2431 module (22) comprises antenna and realizes the circuit of radio communication function and the circuit of calculating location coordinate, the hardware positioning engine that CC2431 module (22) is used for the calculating location coordinate is based on receiving signal intensity indication technology, calculates the present position coordinate according to the ZigBee signal intensity that receives and known setting base position coordinates.
8. according to claim 1 a kind of for detection of the detection system of gas concentration everywhere in the space, it is characterized in that: the CC2430 module (31) that monitoring center's communication facilities (3) comprises grafting and the usb communication circuit (32) that is connected with CC2430 module (31) and with the communication power supply that is connected (33) of usb communication circuit (32), the ZigBee signal that the detection terminal that monitoring center's communication facilities (3) will receive is sent is converted to usb signal and is transferred to computing machine (5), and the usb signal that computing machine (5) sends is converted to the ZigBee signal sends to setting base (1).
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| CN2013100665551A CN103196956A (en) | 2013-03-01 | 2013-03-01 | System for detecting gas concentration throughout the space |
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| CN2013100665551A CN103196956A (en) | 2013-03-01 | 2013-03-01 | System for detecting gas concentration throughout the space |
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| CN103196956A true CN103196956A (en) | 2013-07-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104618867A (en) * | 2014-12-30 | 2015-05-13 | 山东康威通信技术股份有限公司 | Bluetooth based power tunnel position information pushing method |
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| US4422073A (en) * | 1981-10-27 | 1983-12-20 | The Bendix Corporation | Combustible gas detection system |
| CN101349744A (en) * | 2008-06-27 | 2009-01-21 | 重庆智溢科技有限公司 | Method and system for tracking and positioning downhole personnel based on Zigbee network platform |
| CN101505546A (en) * | 2009-02-26 | 2009-08-12 | 清华大学 | Mine environment probing and search and rescue emergency response system based on wireless sensor network |
| CN201518012U (en) * | 2009-11-20 | 2010-06-30 | 黑龙江科技学院 | Master-slave mode wireless gas sensor system |
| CN101790179A (en) * | 2010-02-12 | 2010-07-28 | 中国矿业大学(北京) | Mine mobile communication system |
| CN101854389A (en) * | 2010-05-21 | 2010-10-06 | 江苏三恒科技集团有限公司 | Multi-service wireless communication system for coal mine |
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2013
- 2013-03-01 CN CN2013100665551A patent/CN103196956A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4422073A (en) * | 1981-10-27 | 1983-12-20 | The Bendix Corporation | Combustible gas detection system |
| CN101349744A (en) * | 2008-06-27 | 2009-01-21 | 重庆智溢科技有限公司 | Method and system for tracking and positioning downhole personnel based on Zigbee network platform |
| CN101505546A (en) * | 2009-02-26 | 2009-08-12 | 清华大学 | Mine environment probing and search and rescue emergency response system based on wireless sensor network |
| CN201518012U (en) * | 2009-11-20 | 2010-06-30 | 黑龙江科技学院 | Master-slave mode wireless gas sensor system |
| CN101790179A (en) * | 2010-02-12 | 2010-07-28 | 中国矿业大学(北京) | Mine mobile communication system |
| CN101854389A (en) * | 2010-05-21 | 2010-10-06 | 江苏三恒科技集团有限公司 | Multi-service wireless communication system for coal mine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104618867A (en) * | 2014-12-30 | 2015-05-13 | 山东康威通信技术股份有限公司 | Bluetooth based power tunnel position information pushing method |
| CN104618867B (en) * | 2014-12-30 | 2018-05-15 | 山东康威通信技术股份有限公司 | A kind of electric power tunnel positional information method for pushing based on bluetooth |
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Application publication date: 20130710 |