CN105243795A - Self-adaptive wireless relay gas detection alarm system and laying method thereof - Google Patents
Self-adaptive wireless relay gas detection alarm system and laying method thereof Download PDFInfo
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- CN105243795A CN105243795A CN201510751100.2A CN201510751100A CN105243795A CN 105243795 A CN105243795 A CN 105243795A CN 201510751100 A CN201510751100 A CN 201510751100A CN 105243795 A CN105243795 A CN 105243795A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
Abstract
The invention discloses a self-adaptive wireless relay gas detection alarm system and a laying method thereof. The self-adaptive wireless relay gas detection alarm system comprises a wireless gas detector, a wireless repeater and a wireless gas alarm controller. The wireless gas detector is connected with the wireless repeater via a wireless communication module. The wireless repeater is connected with the gas alarm controller via the wireless communication module. A wireless communication mode is adopted, system laying is more flexible and convenient and material and labor cost is reduced. Meanwhile, the wireless repeater is used so that system coverage area range can be effectively enlarged, and communication reliability of the gas detection alarm system can be enhanced by avoiding shielding obstacles or interference sources. Automatic channel selection after onsite installation of equipment can be realized so that the self-adaptive wireless relay gas detection alarm system has the obvious advantages of convenient operation in the wide-range detection application, and rapid networking can be effectively realized. The self-adaptive wireless relay gas detection alarm system has characteristics that channels are mutually independent without mutual interference, and communication signal forwarding efficiency is high so that real-time performance of the detection alarm system can be effectively enhanced.
Description
Technical field
The invention belongs to environment monitoring field, be specifically related to a kind of adaptive wireless relaying gas detection alarm system and distribution method.
Background technology
Along with the fast development of economy and the raising of quality of life; people are to the more and more concern of toxic and harmful content in atmospheric environment; simultaneously in industrial processes and harmful influence storage environment; Timeliness coverage is flammable and the leakage of toxic and harmful; effectively potential safety hazard be can evade, thus the person and the property safety of field personnel ensured.
At present, the gas detecting system and the equipment that are widely used in industrial environment are divided into two classes, the first kind is portable gas detector, this kind of gas detecting instrument can be carried with, when staff enters operating environment, if detect that flammable or toxic and harmful is revealed, equipment meeting and alarm, staff is reminded to withdraw as early as possible.But this kind of gas detecting instrument is not suitable for the working environment that needs are uninterruptedly monitored for 24 hours, for some hazardous locations, often needs first to determine Environmental security, just allow staff to enter, this type of gas detecting instrument is inapplicable equally.Equations of The Second Kind is online gas detecting instrument, online gas detecting instrument adopts hard-wired mode, according to the valid analysing range reasonable layout check point of detector in surveyed area, the environmental gas indicating value detected is uploaded to gas alarm controller by multiple online gas detecting instrument in real time, can realize uninterrupted unmanned monitorings in 24 hours of surveyed area.
The Signal transmissions of online gas detection alarm system is divided into wire transmission and wireless transmission two kinds, and wire transmission adopts 4-20mA current signal or RS485 digital signal.In recent years, along with the development of technology of Internet of things, adopt the gas detection alarm system of wireless networking form more and more to receive the concern of people, but also fail the widespread use that obtains in industry.The existing gas detection alarm system problem of mainly depositing in the following areas has to be solved:
1, wired gas detection alarm system needs to carry out cable wiring manufacture, extensive area monitoring time, cable wiring manufacture material and cost of labor high, gas detecting instrument lay underaction.
2, Conventional wireline cable signal (4-20mA current signal or RS485 digital signal) transmission range is shorter, is generally no more than 1000 meters, needs to adopt optical fiber link, add the complexity of system building for more long-distance transmissions.
3, conventional wireless gas detection alarm system, signal transmission distance and reliability are subject to such environmental effects larger, when such as alarm controller and gas detecting instrument transmission path existing the electromagnetic interference (EMI) of larger metal board wall or large power-consuming equipment, to radio communication quality be had a strong impact on, and even cause and cannot communicate.
Summary of the invention
The object of the invention is to the deficiency overcome in prior art, a kind of adaptive wireless relaying gas detection alarm system is proposed, provide a kind of gas detection alarm system distribution method of adaptive wireless relaying, to realize the real-time testing and alarm of gas concentration in industrial environment simultaneously.
In order to solve the problem, the technical solution used in the present invention is:
A kind of adaptive wireless relaying gas detection alarm system, is characterized in that: comprise wireless gas alarm controller, wireless repeater and wireless gas detecting instrument,
Described wireless gas detecting instrument is used for the gas concentration detected in real time in industrial environment, and carries out scene display, alarm prompt to gas detect value, then sends above data to wireless repeater by wireless communication module;
Described wireless repeater is used for the wireless signal between relay wireless gas detecting instrument and wireless gas alarm controller, to wireless gas detecting instrument timing request data, and the data transmitted by wireless gas detecting instrument are uploaded to wireless gas alarm controller by wireless communication module;
Described wireless gas alarm controller, for managing all wireless gas detecting instruments concentratedly, the alarm condition of the gas concentration value that the wireless gas detecting instrument of real-time display detects and each wireless gas detecting instrument.
Aforesaid a kind of adaptive wireless relaying gas detection alarm system, it is characterized in that: described wireless gas detecting instrument comprises wireless communication module, signal transmitting device and gas sensor, described gas sensor detects the gas concentration in industrial environment in real time, described signal transmitting device is by gas concentration, the display of gas detect value scene, these data of alarm prompt are according to the communications protocol format of agreement, become the RS485 digital signal sending air inclusion detected state information, wireless communication module converts RS485 digital signal to wireless signal again, realize the communication between wireless repeater.
Aforesaid a kind of adaptive wireless relaying gas detection alarm system, it is characterized in that: described wireless gas detecting instrument comprises sensor, signal conditioning circuit, microcontroller, display module, alarm module, wireless communication module, described sensor is connected with signal conditioning circuit, described signal conditioning circuit is connected with microcontroller, described microcontroller is connected with alarm module with display module respectively, described microcontroller is communicated with wireless repeater by wireless communication module, described sensor can adopt catalytic combustion sensor, electrochemical sensor, infrared sensor, photoion sensor.
Aforesaid a kind of adaptive wireless relaying gas detection alarm system, it is characterized in that: described wireless repeater comprises up-link wireless communication module, window machine controller and descending wireless communication module, up-link wireless communication module is used for carrying out data communication with wireless gas alarm controller, descending wireless communication module is used for and wireless gas detecting instrument carries out data communication, window machine controller is used for carrying out timing data request management to the wireless gas detecting instrument including repeater management in, and respond the data requesting instructions that wireless gas alarm controller person higher level wireless repeater sends.
Aforesaid a kind of adaptive wireless relaying gas detection alarm system, it is characterized in that: described radio alarming controller comprises gas alarm controller and wireless communication module, gas alarm controller possesses sound and light of alarm, described gas alarm controller is equipped with 7 cun of touch-screens, gas detect data and the alarm condition of all passages can be shown, and carry SD card, be used for store historical data, be connected with upper location supervisory by RS485 bus or network interface, realize large-scale Centralized Monitoring.
Aforesaid a kind of adaptive wireless relaying gas detection alarm system, it is characterized in that: the wireless communication module working frequency range in described wireless gas alarm controller, wireless repeater and wireless gas detecting instrument is 433MHz, receiving sensitivity can reach-120dBm, transmission range 3500 ~ 4000 meters, there are 64 independent channels optional, be connected with microcontroller by serial ports, Channel assignment, by serial ports instruction configuration, realizes the wireless transparent transmission of serial data.
For a distribution method for adaptive wireless relaying gas detection alarm system according to claim 1, it is characterized in that, comprise the steps:
1, environmentally detect needs and rule of communication, field deployment is carried out to gas detection alarm system equipment;
2, wireless gas alarm controller parameter initialization is arranged: according to on-the-spot layout scheme, on wireless gas alarm controller, following parameter is manually set: the wireless communication module channel number P_main of wireless gas alarm controller, the address Addr_R_next of subordinate's wireless repeater, wireless gas detecting instrument quantity Nt;
3, wireless repeater messaging parameter Initialize installation, according to layout scheme, on all wireless repeaters, carries dial-up by plate, manually arranges wireless repeater address Addr_R;
4, wireless communication module channel self-adapting configuration: automatically broadcast handshake step by step by wireless gas alarm controller and wireless repeater, the wireless gas detecting instrument and the wireless repeater that receive handshake carry out channel self-adapting configuration;
5, the wireless gas detecting instrument data of wireless gas alarm controller timing request, carry out alarm judgement and show.
The distribution method of aforesaid a kind of adaptive wireless relaying gas detection alarm system, the wherein channel self-adapting of wireless communication module described in step 4 configuration, carry out as follows:
4.1, device power initialization, the channel default initialization of its wireless communication module is the 64th channel by all wireless gas detecting instruments and wireless repeater, wait-receiving mode handshake;
4.2, wireless gas alarm controller starts hand shake procedure, 64th channel broadcasts handshake, two effective information fields are comprised: wireless communication module authorization channel P_set, subordinate wireless repeater mailing address Addr_R_next, make P_set=P_main before host broadcast handshake in handshake frame format;
4.3, its wireless communication module channel is set to P_main channel by wireless gas alarm controller;
4.4, the wireless repeater receiving handshake carries out wireless communication module channel configuration, wireless repeater judges that whether the wireless repeater address Addr_R_next in handshake is identical with the machine address Addr_R, if Addr_R_next and Addr_R is different, continue to wait for handshake; If identical, be then P_set channel by the channel configuration of its up-link wireless communication module, and send wireless repeater handshake response signal by up-link wireless communication module, the address Addr_R of current wireless repeater is comprised in wireless repeater handshake response signal frame form, make P_set=P_set+1, by descending wireless communication module, this wireless repeater broadcasts handshake on the 64th channel, the value of authorization channel in handshake number is set to P_set, is P_set channel afterwards by the channel configuration of its descending wireless communication module;
4.5, after wireless gas detecting instrument receives handshake, be P_set channel by the channel configuration of its wireless communication module, the channel configuration success pilot lamp simultaneously on wireless gas detecting instrument display board is bright;
4.6, receive the wireless repeater of handshake response signal, forwarded the handshake response signal received by up-link wireless communication module, be uploaded to wireless gas alarm controller step by step;
4.7, wireless gas alarm controller receives handshake response signal, upgrades the display of handshake process state;
4.8, repeat step 4.4 ~ 4.7, until all wireless repeaters are shaken hands successfully, complete the channel self-adapting configuration of all wireless communication modules.
The distribution method of aforesaid a kind of adaptive wireless relaying gas detection alarm system, the wherein wireless gas detecting instrument data of wireless gas alarm controller timing request described in step 5, carry out as follows:
5.1, after completing the configuration of all wireless repeater channel self-adaptings, the request of data address Addr_Request=1 in wireless gas alarm controller is made;
5.2, wireless gas alarm controller is on P_main channel, send data request signal, comprise asked wireless gas detecting instrument address in data request signal frame format and be set to Addr_Request, meanwhile, wireless gas alarm controller timer internal starts timing;
5.3, up-link wireless communication module channel is after the wireless repeater of P_main channel receives data request signal, at once by its descending wireless communication module, and forwarding data request signal on P_main+1 channel; Transmit so step by step, all wireless repeaters all will after utilizing up-link wireless communication module to receive data request signal, by descending wireless communication module forwarding data request signal;
5.4, wireless gas detecting instrument is on its channel configured, receive data request signal, if Addr_Request is identical with its address Addr_T, then send request of data response signal, in request of data response signal, comprise wireless gas detecting instrument address Addr_T, gas detect value and gas detect status information;
5.5, after wireless repeater utilizes descending wireless communication module to receive the request of data response signal of wireless gas detecting instrument transmission, forwarded by up-link wireless communication module at once, be delivered to wireless gas alarm controller step by step;
5.6, wireless gas alarm controller carries out alarm judgement to the gas detect value received, and on screen, upgrade gas detect indicating value and the state of corresponding address;
5.7, the timing of wireless gas alarm controller timer internal reaches T1 millisecond, make Addr_Request=Addr_Request+1, if Addr_Request>Nt, then make Addr_Request=1, repeat step 5.2 ~ 5.6, thus realize the data of timing cycle request all gas detector.
The beneficial effect that the present invention reaches:
(1), the present invention adopts communication, compared with Conventional wireline gas detection alarm system, the laying of system is more flexible, reduce material and cost of labor, meanwhile, adopt wireless repeater, can effectively expand system coverage area scope, by getting around shielding obstacle or interference source, strengthen the communication reliability of gas detection alarm system.
(2), wireless communication module channel self-adapting collocation method of the present invention, can realize after wireless repeater and wireless gas detecting instrument install at the scene, without the need to its communication lines of manual configuration by and automatic selective channel, detect in application the clear superiority with operation readiness on a large scale, can effectively realize quick networking.
(3), that wireless repeater of the present invention has uplink and downlink channel is separate, and non-interfering feature, signal of communication forward efficiency is high, effectively improves the real-time of detection alarm system.
Accompanying drawing explanation
Fig. 1 a kind of adaptive wireless relaying gas detection alarm system structural representation of the present invention.
Fig. 2 a kind of adaptive wireless relaying gas detection alarm system wireless communication module channel configuration process flow diagram of the present invention.
Fig. 3 wireless repeater request of data of the present invention address list adaptive configuration process flow diagram.
Fig. 4 wireless gas alarm of the present invention controls the wireless gas detecting instrument data flowchart of timing request.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1, a kind of adaptive wireless relaying gas detection alarm system, it is characterized in that: comprise wireless gas alarm controller 1, wireless repeater 4 and wireless gas detecting instrument 8, described wireless gas detecting instrument 8 is for detecting the gas concentration in industrial environment in real time, and scene display, alarm prompt are carried out to gas detect value, then send above data to wireless repeater 4 by wireless communication module; Described wireless repeater 4 is for the wireless signal between relay wireless gas detecting instrument 8 and wireless gas alarm controller 1, to wireless gas detecting instrument 8 timing request data, and the data transmitted by wireless gas detecting instrument 8 are uploaded to wireless gas alarm controller 1 by wireless communication module; Described wireless gas alarm controller 1, for managing all wireless gas detecting instruments 8 concentratedly, the alarm condition of the gas concentration value that the wireless gas detecting instrument 8 of real-time display detects and each wireless gas detecting instrument 8.
Described wireless gas detecting instrument 8 comprises wireless communication module 9, signal transmitting device 10 and gas sensor 11, described gas sensor 11 is for the gas concentration value in real-time testing environment, described signal transmitting device 10 is nursed one's health for the weak voltage that exports gas sensor 11 or current signal, sampling and converting digital signal to exports, and described wireless communication module 9 sends to wireless repeater 4 or wireless gas alarm controller 1 for converting signal transmitting device to wireless signal by the digital signal that serial ports sends out.Wireless gas detecting instrument 8 has the function of adaptively selected communication channel, can adaptively selected effective communication path, realizes data upload quickly and accurately.
Described wireless gas detecting instrument 8 comprises sensor, signal conditioning circuit, microcontroller, display module, alarm module, wireless communication module, described sensor is connected with signal conditioning circuit, described signal conditioning circuit is connected with microcontroller, described microcontroller is connected with alarm module with display module respectively, described microcontroller is communicated with wireless repeater 4 by wireless communication module, described sensor can adopt catalytic combustion sensor, electrochemical sensor, infrared sensor, photoion sensor, the combustible gas be used for respectively in testing environment, oxygen, carbon dioxide and toxic and harmful.Each wireless gas detecting instrument has unique mailing address in systems in which, is used for realizing point-to-point communication.
Described wireless repeater 4 comprises up-link wireless communication module 5, window machine controller 6 and descending wireless communication module 7, up-link wireless communication module 5 is used for carrying out data communication with wireless gas alarm controller 1, descending wireless communication module 7 is used for and wireless gas detecting instrument 8 carries out data communication, window machine controller 6 is used for carrying out timing data request management to the wireless gas detecting instrument 8 including repeater management 6 in, and responds the data requesting instructions that wireless gas alarm controller higher level wireless repeater 4 sends.
Described radio alarming controller 1 comprises gas alarm controller 2 and wireless communication module 3, gas alarm controller 2 possesses sound and light of alarm, be used for all wireless gas detecting instrument timing request data, and alarm judgement, indicating value and state display are carried out to data.Described gas alarm controller 1 is equipped with 7 cun of touch-screens, gas detect data and the alarm condition of all passages can be shown, and carry SD card, be used for store historical data, be connected with upper location supervisory by RS485 bus or network interface, realize large-scale Centralized Monitoring.
Wireless communication module in described wireless gas alarm controller 1, wireless repeater 4 and wireless gas detecting instrument 8 have employed multiband, multichannel and intertexture albefaction algorithm to reduce interference in transmitting procedure to improve transmission performance, working frequency range is 433MHz, receiving sensitivity can reach-120dBm, transmission range 3500 ~ 4000 meters, 64 independent channels are optional, be connected with microcontroller by serial ports, Channel assignment, by serial ports instruction configuration, realizes the wireless transparent transmission of serial data.
As shown in Figure 2, a kind of distribution method of adaptive wireless relaying gas detection alarm system, is characterized in that, comprise the steps:
1, environmentally detect needs and rule of communication, field deployment is carried out to gas detection alarm system equipment;
2, wireless gas alarm controller 1 parameter initialization is arranged: according to on-the-spot layout scheme, on wireless gas alarm controller 1, following parameter is manually set: the wireless communication module 3 channel number P_main of wireless gas alarm controller 1, the address Addr_R_next of subordinate's wireless repeater 4, wireless gas detecting instrument 8 quantity Nt;
3, wireless repeater 4 messaging parameter Initialize installation, according to layout scheme, on all wireless repeaters 4, carries dial-up by plate, manually arranges wireless repeater 4 address Addr_R;
4, wireless communication module channel self-adapting configuration: automatically broadcast handshake step by step by wireless gas alarm controller 1 and wireless repeater 4, the wireless gas detecting instrument 8 and the wireless repeater that receive handshake carry out channel self-adapting configuration;
5, the wireless gas detecting instrument data of wireless gas alarm controller 1 timing request, carry out alarm judgement and show.
As shown in Figure 3, the wireless communication module channel self-adapting collocation method of wireless gas detecting instrument and wireless repeater in system described in above-mentioned steps 4, concrete steps are as follows:
4.1, device power initialization, the channel default initialization of its wireless communication module is the 64th channel by all wireless gas detecting instruments 8 and wireless repeater 4, wait-receiving mode handshake;
4.2, wireless gas alarm controller 1 starts hand shake procedure, 64th channel broadcasts handshake, two effective information fields are comprised: wireless communication module authorization channel P_set, subordinate's wireless repeater 4 mailing address Addr_R_next, make P_set=P_main before host broadcast handshake in handshake frame format;
4.3, its wireless communication module channel is set to P_main channel by wireless gas alarm controller 1;
4.4, the wireless repeater 4 receiving handshake carries out wireless communication module channel configuration, wireless repeater 4 judges that whether the wireless repeater 4 address Addr_R_next in handshake is identical with the machine address Addr_R, if Addr_R_next and Addr_R is different, continue to wait for handshake; If identical, be then P_set channel by the channel configuration of its up-link wireless communication module, and send wireless repeater 4 handshake response signal by up-link wireless communication module, the address Addr_R of current wireless repeater 4 is comprised in wireless repeater 4 handshake response signal frame form, make P_set=P_set+1, by descending wireless communication module, this wireless repeater 4 broadcasts handshake on the 64th channel, the value of authorization channel in handshake number is set to P_set, is P_set channel afterwards by the channel configuration of its descending wireless communication module;
4.5, after wireless gas detecting instrument 8 receives handshake, be P_set channel by the channel configuration of its wireless communication module, the channel configuration success pilot lamp simultaneously on wireless gas detecting instrument 8 display board is bright;
4.6, receive the wireless repeater 4 of handshake response signal, forwarded the handshake response signal received by up-link wireless communication module, be uploaded to wireless gas alarm controller 1 step by step;
4.7, wireless gas alarm controller 1 receives handshake response signal, upgrades the display of handshake process state;
4.8, repeat step 4.4 ~ 4.7, until all wireless repeaters 4 are shaken hands successfully, complete the channel self-adapting configuration of all wireless communication modules.
With reference to Fig. 4, described in step 5, the workflow of wireless gas alarm controller timing request wireless gas detecting instrument data is as follows:
5.1, after completing the configuration of all wireless repeater 4 channel self-adaptings, the request of data address Addr_Request=1 in wireless gas alarm controller (1) is made;
5.2, wireless gas alarm controller 1 is on P_main channel, send data request signal, comprise asked wireless gas detecting instrument 8 address in data request signal frame format and be set to Addr_Request, meanwhile, wireless gas alarm controller 1 timer internal starts timing;
5.3, up-link wireless communication module channel is after the wireless repeater 4 of P_main channel receives data request signal, at once by its descending wireless communication module, and forwarding data request signal on P_main+1 channel; Transmit so step by step, all wireless repeaters 4 all will after utilizing up-link wireless communication module to receive data request signal, by descending wireless communication module forwarding data request signal;
5.4, wireless gas detecting instrument 8 is on its channel configured, receive data request signal, if Addr_Request is identical with its address Addr_T, then send request of data response signal, in request of data response signal, comprise wireless gas detecting instrument 8 address Addr_T, gas detect value and gas detect status information;
5.5, after wireless repeater 4 utilizes descending wireless communication module to receive the request of data response signal of wireless gas detecting instrument 8 transmission, forwarded by up-link wireless communication module at once, be delivered to wireless gas alarm controller 1 step by step;
5.6, wireless gas alarm controller 1 carries out alarm judgement to the gas detect value received, and on screen, upgrade gas detect indicating value and the state of corresponding address;
5.7, the timing of wireless gas alarm controller 1 timer internal reaches T1 millisecond, make Addr_Request=Addr_Request+1, if Addr_Request>Nt, then make Addr_Request=1, repeat step 5.2 ~ 5.6, thus realize the data of timing cycle request all gas detector.
More than show and describe ultimate principle of the present invention, principal character and advantage.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (9)
1. an adaptive wireless relaying gas detection alarm system, is characterized in that: comprise wireless gas alarm controller (1), wireless repeater (4) and wireless gas detecting instrument (8),
Described wireless gas detecting instrument (8) is for detecting the gas concentration in industrial environment in real time, and scene display, alarm prompt are carried out to gas detect value, then send above data to wireless repeater (4) by wireless communication module;
Described wireless repeater (4) is for the wireless signal between relay wireless gas detecting instrument (8) and wireless gas alarm controller (1), to wireless gas detecting instrument (8) timing request data, and the data transmitted by wireless gas detecting instrument (8) are uploaded to wireless gas alarm controller (1) by wireless communication module;
Described wireless gas alarm controller (1), for managing all wireless gas detecting instruments (8) concentratedly, the alarm condition of the gas concentration value that the wireless gas detecting instrument of display (8) in real time detects and each wireless gas detecting instrument (8).
2. a kind of adaptive wireless relaying gas detection alarm system according to claim 1, it is characterized in that: described wireless gas detecting instrument (8) comprises wireless communication module (9), signal transmitting device (10) and gas sensor (11), described gas sensor (11) detects the gas concentration in industrial environment in real time, described signal transmitting device (10) is by gas concentration, the display of gas detect value scene, these data of alarm prompt are according to the communications protocol format of agreement, become the RS485 digital signal sending air inclusion detected state information, wireless communication module (9) converts RS485 digital signal to wireless signal again, realize the communication between wireless repeater (4).
3. a kind of adaptive wireless relaying gas detection alarm system according to claim 2, it is characterized in that: described wireless gas detecting instrument (8) comprises sensor, signal conditioning circuit, microcontroller, display module, alarm module, wireless communication module, described sensor is connected with signal conditioning circuit, described signal conditioning circuit is connected with microcontroller, described microcontroller is connected with alarm module with display module respectively, described microcontroller is communicated with wireless repeater (4) by wireless communication module, described sensor can adopt catalytic combustion sensor, electrochemical sensor, infrared sensor, photoion sensor.
4. a kind of adaptive wireless relaying gas detection alarm system according to claim 3, it is characterized in that: described wireless repeater (4) comprises up-link wireless communication module (5), window machine controller (6) and descending wireless communication module (7), up-link wireless communication module (5) is used for carrying out data communication with wireless gas alarm controller (1), descending wireless communication module (7) is used for and wireless gas detecting instrument (8) carries out data communication, window machine controller (6) is used for carrying out timing data request management to the wireless gas detecting instrument (8) including repeater management (6) in, and respond the data requesting instructions that wireless gas alarm controller (1) person higher level's wireless repeater (4) sends.
5. a kind of adaptive wireless relaying gas detection alarm system according to claim 4, it is characterized in that: described radio alarming controller (1) comprises gas alarm controller (2) and wireless communication module (3), gas alarm controller (2) possesses sound and light of alarm, described gas alarm controller (1) is equipped with 7 cun of touch-screens, gas detect data and the alarm condition of all passages can be shown, and carry SD card, be used for store historical data, be connected with upper location supervisory by RS485 bus or network interface, realize large-scale Centralized Monitoring.
6. a kind of adaptive wireless relaying gas detection alarm system according to claim 5, it is characterized in that: the wireless communication module working frequency range in described wireless gas alarm controller (1), wireless repeater (4) and wireless gas detecting instrument (8) is 433MHz, receiving sensitivity can reach-120dBm, transmission range 3500 ~ 4000 meters, there are 64 independent channels optional, be connected with microcontroller by serial ports, Channel assignment, by serial ports instruction configuration, realizes the wireless transparent transmission of serial data.
7., for a distribution method for adaptive wireless relaying gas detection alarm system according to claim 1, it is characterized in that, comprise the steps:
1, environmentally detect needs and rule of communication, field deployment is carried out to gas detection alarm system equipment;
2, wireless gas alarm controller (1) parameter initialization is arranged: according to on-the-spot layout scheme, on wireless gas alarm controller (1), following parameter is manually set: wireless communication module (3) channel number P_main, the address Addr_R_next of subordinate's wireless repeater (4), wireless gas detecting instrument (8) the quantity Nt of wireless gas alarm controller (1);
3, wireless repeater (4) messaging parameter Initialize installation, according to layout scheme, on all wireless repeaters (4), carries dial-up by plate, manually arranges wireless repeater (4) address Addr_R;
4, wireless communication module channel self-adapting configuration: automatically broadcast handshake step by step by wireless gas alarm controller (1) and wireless repeater (4), the wireless gas detecting instrument (8) and the wireless repeater that receive handshake carry out channel self-adapting configuration;
5, the wireless gas detecting instrument data of wireless gas alarm controller (1) timing request, carry out alarm judgement and show.
8. the distribution method of a kind of adaptive wireless relaying gas detection alarm system according to claim 7, the wherein channel self-adapting of wireless communication module described in step 4 configuration, carry out as follows:
4.1, device power initialization, the channel default initialization of its wireless communication module is the 64th channel by all wireless gas detecting instruments (8) and wireless repeater (4), wait-receiving mode handshake;
4.2, wireless gas alarm controller (1) starts hand shake procedure, 64th channel broadcasts handshake, two effective information fields are comprised: wireless communication module authorization channel P_set, subordinate's wireless repeater (4) mailing address Addr_R_next, make P_set=P_main before host broadcast handshake in handshake frame format;
4.3, its wireless communication module channel is set to P_main channel by wireless gas alarm controller (1);
4.4, the wireless repeater (4) receiving handshake carries out wireless communication module channel configuration, wireless repeater (4) judges that whether wireless repeater (4) the address Addr_R_next in handshake is identical with the machine address Addr_R, if Addr_R_next and Addr_R is different, continue to wait for handshake, if identical, be then P_set channel by the channel configuration of its up-link wireless communication module, and send wireless repeater (4) handshake response signal by up-link wireless communication module, the address Addr_R of current wireless repeater (4) is comprised in wireless repeater (4) handshake response signal frame form, make P_set=P_set+1, by descending wireless communication module, this wireless repeater (4) broadcasts handshake on the 64th channel, the value of authorization channel in handshake number is set to P_set, be P_set channel by the channel configuration of its descending wireless communication module afterwards,
4.5, after wireless gas detecting instrument (8) receives handshake, be P_set channel by the channel configuration of its wireless communication module, the channel configuration success pilot lamp simultaneously on wireless gas detecting instrument (8) display board is bright;
4.6, receive the wireless repeater (4) of handshake response signal, forwarded the handshake response signal received by up-link wireless communication module, be uploaded to wireless gas alarm controller (1) step by step;
4.7, wireless gas alarm controller (1) receives handshake response signal, upgrades the display of handshake process state;
4.8, repeat step 4.4 ~ 4.7, until all wireless repeaters (4) are shaken hands successfully, complete the channel self-adapting configuration of all wireless communication modules.
9. the distribution method of a kind of adaptive wireless relaying gas detection alarm system according to claim 8, the wherein wireless gas detecting instrument data of wireless gas alarm controller described in step 5 (1) timing request, carry out as follows:
5.1, after completing the configuration of all wireless repeaters (4) channel self-adapting, the request of data address Addr_Request=1 in wireless gas alarm controller (1) is made;
5.2, wireless gas alarm controller (1) is on P_main channel, send data request signal, comprise asked wireless gas detecting instrument (8) address in data request signal frame format and be set to Addr_Request, meanwhile, wireless gas alarm controller (1) timer internal starts timing;
5.3, up-link wireless communication module channel is after the wireless repeater (4) of P_main channel receives data request signal, at once by its descending wireless communication module, and forwarding data request signal on P_main+1 channel; Transmit so step by step, all wireless repeaters (4) all will after utilizing up-link wireless communication module to receive data request signal, by descending wireless communication module forwarding data request signal;
5.4, wireless gas detecting instrument (8) is on its channel configured, receive data request signal, if Addr_Request is identical with its address Addr_T, then send request of data response signal, in request of data response signal, comprise wireless gas detecting instrument (8) address Addr_T, gas detect value and gas detect status information;
5.5, after wireless repeater (4) utilize descending wireless communication module to receive request of data response signal that wireless gas detecting instrument (8) sends, forwarded by up-link wireless communication module at once, be delivered to wireless gas alarm controller (1) step by step;
5.6, wireless gas alarm controller (1) carries out alarm judgement to the gas detect value received, and on screen, upgrade gas detect indicating value and the state of corresponding address;
5.7, wireless gas alarm controller (1) timer internal timing reaches T1 millisecond, make Addr_Request=Addr_Request+1, if Addr_Request>Nt, then make Addr_Request=1, repeat step 5.2 ~ 5.6, thus realize the data of timing cycle request all gas detector.
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