CN100517406C - Wireless fire fighting detector network based on ZigBee and control method - Google Patents
Wireless fire fighting detector network based on ZigBee and control method Download PDFInfo
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- CN100517406C CN100517406C CNB2005100406463A CN200510040646A CN100517406C CN 100517406 C CN100517406 C CN 100517406C CN B2005100406463 A CNB2005100406463 A CN B2005100406463A CN 200510040646 A CN200510040646 A CN 200510040646A CN 100517406 C CN100517406 C CN 100517406C
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Abstract
The system is composed of module of wireless communication network for fire fighting, wireless fire fighting gateway, and fire fighting controller. Including detector for fire fighting, relevant link gear, wireless communication module and wireless repeater for fire fighting, the said module of wireless communication network for fire fighting is in use for implementing collection and networked transmission for data of fire information. Connected to the fire fighting controller through cable, the gateway is connected to wireless communication network for fire fighting through a wireless communication module. Collecting data through wireless sensor network, the gateway receives polling and querying from controller. Receiving wireless fire fighting signal corrected by the gateway, the fire fighting controller outputs relevant processed signal based on different types of signal. Features are: adaptability, easy of installation, and low cost.
Description
Technical field:
The present invention relates to wireless fire fighting detector network and control method thereof, a kind of wireless fire fighting detector network based on ZigBee of more specifically saying so reaches the control method based on this network.
Background technology:
Have the detection function, report to the police automatically, the fire-fighting system of linkage automatic fire extinguisher has become the ten minutes important means that ensures that the people produce, life is carried out smoothly.But, domestic still do not have the wireless fire disaster automatic alarm system at present, there is not the ancient building of the wired fire-fighting system of condition setting for some,, fire load low because of its fire resistance rating is big, building is adjoined, the cohort layout, away from cities and towns, backer's lack of water, equipment lack, reason such as road is not smooth, exist great potential safety hazard; In some multi-functional building, wiring is chaotic, aging circuit is also worked reliably and with long-term for wired system has increased suitable difficulty; The building that has come into operation is equipped with not only cost height of wire system again, and difficulty is also quite big.And the wireless fire-fighting detection system product of external existing non-network exists little, the problem such as cost an arm and a leg of scale support, can not satisfy China's demand.
Summary of the invention:
The present invention is for avoiding above-mentioned existing in prior technology weak point, a kind of wireless fire fighting detector network and control method based on the ZigBee wireless communication protocol that facility, moderate cost, reliable operation are installed being provided.
The technical scheme that technical solution problem of the present invention is adopted is:
The present invention is based on the wireless fire fighting detector network of ZigBee, its system forms and comprises wireless fire communication net module, wireless fire-fighting gateway and fire-fighting controller:
Described wireless fire communication net module comprises fire fighting detector, corresponding linkage, wireless communication module and wireless fire-fighting repeater, finishes the collection and networking transmission of fire information data, wherein:
A, described fire fighting detector comprise smoke detector, combustible gas probe, hygrosensor, are used for fire and current region state are caught;
B, described corresponding linkage comprise fire-fighting water valve, flusher, audible-visual annunciator, are used to accept instruction realization self-extinguishing, indication fire alarm, the guide crowd evacuation of fire-fighting controller;
C, described wireless communication module adopt the ZigBee communication module, link to each other with fire fighting detector and linkage, with ZigBee protocol construction cordless communication network, realize the networked wireless transmission of data;
D, described wireless fire-fighting repeater are realized the amplification forwarding capability of wireless signal by wireless communication module access to wireless communication network;
Described wireless fire-fighting gateway and described fire-fighting controller wired connection, and insert wireless fire communication net by a wireless communication module; By wireless fire-fighting gateway the data in the network are collected, accept patrolling and examining and inquiring about of self-controller simultaneously; Receive the wireless fire-fighting signal that wireless fire-fighting gateway is collected by described fire-fighting controller,, export corresponding process information according to different signal types.
Characteristics based on the control method of system of the present invention are may further comprise the steps:
A, wireless communication module according to fixing message formatization, by the direct sequence spread spectrum modulation, carry out wireless network transmissions according to ZigBee communication protocol with the input signal of fire fighting detector then;
B, wireless fire-fighting gateway are collected the data message in the wireless Fire Net, by serial ports information are sent to the fire-fighting controller according to fire-fighting controller compatible message form;
Corresponding processing analyzed and makes by c, fire-fighting controller to information;
D, fire-fighting controller can be controlled route, discern wireless fire communication net module automatically, arbitrarily the additions and deletions network node.
Compared with prior art, beneficial effect of the present invention is embodied in:
1, based on the wireless network architecture of up-to-date ZigBee technology
The ZigBee technology be specially at the wireless sensor network exploitation a kind of closely, low complex degree, low-power consumption, low data rate, two-way wireless communication technology cheaply.The present invention has adopted up-to-date ZigBee wireless communication technology, builds the wireless fire fighting detector network, compares with traditional wired fire protection alarm system, and system installs, and the complexity of debugging reduces greatly, to the destruction and the also existence hardly of transformation of buildings.The security protection transformation of the ancient building that can't transform for numerous domestic and the buildings that has come into operation has very strong specific aim and practicality.
2, adaptivity flexibly
The wireless fire fighting detector network that the present invention built has the healthy and strong network system, has powerful adaptivity.The fire-fighting controller can be controlled route, and additions and deletions detector node can be adjusted network size according to construction scope arbitrarily, and not increase of the complexity of installing and being provided with, and has avoided traditional wired alarming system scale less, the drawback that dirigibility is weak.
3, cheap cost
Occurred the wireless fire fighting detector system abroad, but price is very expensive.The ZigBee technology that the present invention adopts has characteristics such as low rate, low-power consumption, low cost, make current system cost drop to the degree that maintains an equal level with traditional wired fire-fighting system, and the price of ZigBee module is still in further reduction, system cost of the present invention will be very cheap, is easy to marketing.
4, low-power consumption
The present invention can adopt the EM2420 chip of Ember company, in single chip, comprised assembly indispensable in 802.15.4 and the ZigBee compatible system, support synchronized sleep and wake up, effectively reduced power consumption, under most intended application occasions, only depend on accurate No. 5 batteries of two feast-brand marks with regard to sustainable work 6 months to 2 years, thereby prolonged each detector node maintenance cycle, saved corresponding man power and material.
5, information gathering promptly and accurately and transmission
The present invention can in time catch the condition of a fire by adopting the high-quality fire fighting detector; By in its wireless network transmissions, taking 8bit data mode transmission, and timed sending, patrol and examine and three kinds of transmission modes of the output of reporting to the police are carried out co-ordination, can make information data carry out Network Transmission in the very first time; Based on the Network Transmission of ZigBee agreement, comprise strict data check, fully guaranteed the accuracy of data, effectively avoided the wrong report of the condition of a fire and failed to report.
6, data are intuitively complete
The data that inside of the present invention communicates with one another comprise regional temperature, smokescope, detector position, several data such as detector electric weight, and in the fire-fighting controller database storage and uniform, call and manage, and with LCD display, carry printer and carry out data output.
Description of drawings:
Fig. 1 is the block diagram of system of the present invention.
Fig. 2 is a network node hardware block diagram of the present invention.
Fig. 3 is applied EmberZigBee architecture signal among the present invention.
Embodiment:
Referring to Fig. 1, system of the present invention forms and comprises wireless fire communication net module, wireless fire-fighting gateway and fire-fighting controller:
Described wireless fire communication net module comprises fire fighting detector, corresponding linkage, wireless communication module and wireless fire-fighting repeater, finishes the collection and networking transmission of fire information data, wherein:
A, fire fighting detector comprise smoke detector, combustible gas probe, hygrosensor, are used for fire and current region state are caught;
B, corresponding linkage comprise fire-fighting water valve, flusher, audible-visual annunciator, are used to accept instruction realization self-extinguishing, indication fire alarm, the guide crowd evacuation of fire-fighting controller;
C, wireless communication module adopt the ZigBee communication module, link to each other with fire fighting detector and linkage, with ZigBee protocol construction cordless communication network, realize the networked wireless transmission of data;
D, described wireless fire-fighting repeater are realized the amplification forwarding capability of wireless signal by wireless communication module access to wireless communication network;
Described wireless fire-fighting gateway and described fire-fighting controller wired connection, and by a wireless communication module access to wireless communication network; By wireless fire-fighting gateway the data in the network are collected, accept patrolling and examining and inquiring about of self-controller simultaneously; Receive the wireless fire-fighting signal that wireless fire-fighting gateway is collected by described fire-fighting controller,, export corresponding process information according to different signal types.If the condition of a fire will start siren, and output fire alarm information, the output steering order is carried out work with commander's fire-fighting link device and fire fighter.
In concrete the enforcement, the fire-fighting controller is supported a plurality of bus loops, all serve as reasons a sub-network system of wireless fire-fighting gateway and wireless fire communication net module and the common formation of described fire-fighting controller in this loop of every loop.Present embodiment can be supported 20 bus loops at most, connects a wireless fire-fighting gateway on each bus loop, and can maximumly support 200 nodes, and wireless repeater provides signal to amplify for large scale network and transmits.So, can maximumly support to constitute a huge Radio Network System by 4000 nodes for single fire-fighting controller.
Referring to Fig. 2, the detector node in the present embodiment mainly is made of three parts, comprises sensor circuit, governor circuit and wireless transceiver circuit.
Wherein, main control singlechip adopts 8 Chip Microcomputer A tmega128L of AVR kernel, and it adopts advanced RISC framework, abundant IO is provided, and has very low power consumption.Simultaneously, it has the startup guiding function, great convenience is provided for the upgrading and the maintenance of program.
Wireless transceiver circuit adopts the EM2420 of Ember Crop, and it has comprised all indispensable assemblies in 802.15.4 and the ZigBee compatible system in single chip, merged the radio-frequency (RF) transceiver of 2.4GHz, embedded networking storehouse and the development environment of ZigBee.
Control method based on the present embodiment system may further comprise the steps:
1, wireless communication module according to fixing message formatization, by the direct sequence spread spectrum modulation, carries out wireless network transmissions according to the ZigBee wireless communication protocol with the input signal of fire fighting detector then;
In this step, the input signal of fire fighting detector comprises smokescope, temperature, and electric weight and switching value comprise following three kinds of interfaces:
A, warning, early warning signal input interface: two I/O mouths are provided, and described I/O mouth is by the 10K resistance eutral grounding, and high level is imported;
B, digital signal input interface: adopt the UART interface, the agreement baud rate;
C, analog level signal input interface: provide one tunnel 8 A/D input interface, its reference voltage (Vrf+ and Vrf-) scalable.
Message format is followed successively by from left to right:
Heading, type of message, address, type, data, telegram end.
Wireless network transmissions is taked the transmission of 8bit data mode, and transmission mode has three kinds: timed sending, the output of patrolling and examining and report to the police, wherein:
Patrol and examine: certain network node sends search request to it, then sends;
Timed sending: regularly send status information, for the controller record data to network node;
Report to the police and export: when surpassing early warning or alarming threshold value, initiatively send.
2, wireless fire-fighting gateway is collected the data message in the wireless Fire Net, by serial ports information is sent to the fire-fighting controller according to fire-fighting controller compatible message form.
In concrete the enforcement, the data message that wireless fire-fighting gateway is collected in the wireless Fire Net is by utilizing coupled wireless communication module to realize as acquisition node.
3, corresponding processing analyzed and makes by the fire-fighting controller to information, comprising:
When the no condition of a fire:
A, analysis current time, probe address, environment temperature, detector electric weight, smokescope value;
B, with above-mentioned data respectively deposit in system database for the inquiry;
C, the synchronous display status information of LCD display;
When the condition of a fire occurring:
A, analysis current time, probe address, environment temperature, detector electric weight, smokescope;
B, startup siren, the prompting condition of a fire occurs;
C, startup linkage, self-extinguishing and guide crowd evacuation;
D, deposit above-mentioned data in system database and print;
E, the synchronous display status information of LCD display.
4, the fire-fighting controller can be controlled route, discerns wireless fire communication net module automatically, arbitrarily the additions and deletions network node.
The hierarchical model that Fig. 3 shows the Zigbee agreement that the present invention adopts with and with the corresponding relation of OSI network model.From a structural point, host application layer and Ember protocol stack belong to the User Defined scope as shown in the figure, and the application layer of corresponding OSI network model is to five layer protocols of network layer, and the present invention is then by the realization of Atmega128L mcu programming; Be connected with the EM2420 chip by the SPI synchronous serial interface then, finish Error Control and flow control in the transmission by EM2420, launch by antenna the modulation back.This part correspondence data link layer Data link layer and Physical layer Physical layer two layer protocols in the OSI network model.
With a bus loop is example, when system works, sensor circuit is responsible for smokescope, physical quantitys such as outside area temperature are converted into 0 to 2.5V level signal, offer governor circuit, governor circuit carries out analog to digital conversion (AD) with this level signal, changes into the data-signal of a byte, according to certain data format it is packed again, utilize the SPI synchronous serial interface to send data to wireless transceiver circuit again.Modulate by direct sequence spread spectrum by wireless transceiver circuit at last,, it is launched according to the ZigBee agreement.
Its message format is:
(1) message structure
Heading+type of message+(address)+(type)+(data)+telegram end
(2) concrete type of message and form
The Information message, dactylus point sends routine data information, message length 12B.
The 4B data refer to electric weight, temperature, concentration, switching value, down together.
The New message refers to report newly added node and data, message length 12B.
The Lost message refers to report newly added node and data, message length 12B.
The Ack message, answer signal, message length 4B.
Reply data is 0---improper replying, and 1---normal response, 2---reply request-reply simultaneously.
Receive after the message that the other side sends, generally all need make replying and successfully accept with the expression data.Normal response is also represented the existence of node, shakes hands with the maintenance of communicating by letter between the gateway as Centroid.
The Set message is provided with the switching value module, message length 9B.
After receiving the Set message, except normal response, also must after the switching value variation, pass the switch value after implementing nodal operation back.
Update message, gateway node require Centroid to transmit all node address informations again, message length 3B
The Query message, message length 12B.
When gateway receives the information that is not present in the routing table interior nodes, check and verify this node to Centroid, this information is cancelled simultaneously.Check and verify existence as Centroid, then in suitable, send the New instruction.
Simultaneously, sensor node also can serve as routing node, has the data forwarding function.Under the control of governor circuit, wireless transceiver circuit will receive data and reach main control singlechip by the SPI synchronous serial interface, single-chip microcomputer again with data from new processing, add the routing iinformation that some are necessary, pass wireless transceiver circuit back by the SPI synchronous serial interface again.
Wireless fire-fighting gateway mainly plays the effect of data gathering and forwarding: collect the data message in the wireless Fire Net, by serial ports information is sent to the fire-fighting controller according to fire-fighting controller compatible message form.
The fire-fighting controller receives message, analyzes, and obtains temperature, information such as smokescope, and handle it according to information.
Claims (8)
1,, it is characterized in that system's composition comprises wireless fire communication net module, wireless fire-fighting gateway and fire-fighting controller based on the wireless fire fighting detector network of ZigBee wireless communication protocol:
Described wireless fire communication net module comprises fire fighting detector, corresponding linkage, wireless communication module and wireless fire-fighting repeater, finishes the collection and networking transmission of fire information data, wherein:
A, described fire fighting detector comprise smoke detector, combustible gas probe, hygrosensor, are used for fire and current region state are caught;
B, described corresponding linkage comprise fire-fighting water valve, flusher, audible-visual annunciator, are used to accept instruction realization self-extinguishing, indication fire alarm, the guide crowd evacuation of fire-fighting controller;
C, described wireless communication module adopt the ZigBee communication module, link to each other with fire fighting detector and linkage, with ZigBee protocol construction cordless communication network, realize the networked wireless transmission of data;
D, described wireless fire-fighting repeater are realized the amplification forwarding capability of wireless signal by wireless communication module access to wireless communication network;
Described wireless fire-fighting gateway and described fire-fighting controller wired connection, and by a wireless communication module access to wireless communication network; By wireless fire-fighting gateway the data in the network are collected, accept patrolling and examining and inquiring about of self-controller simultaneously; Receive the wireless fire-fighting signal that wireless fire-fighting gateway is collected by described fire-fighting controller,, export corresponding process information according to different signal types.
2, system according to claim 1, it is characterized in that described fire-fighting controller supports a plurality of bus loops, every loop all serve as reasons wireless fire-fighting gateway and wireless fire communication net module and the common sub-network system that constitutes of described fire-fighting controller in this loop.
3, a kind of control method based on the described system of claim 1 is characterized in may further comprise the steps:
A, wireless communication module according to fixing message formatization, by the direct sequence spread spectrum modulation, carry out wireless network transmissions according to the ZigBee wireless communication protocol with the input signal of fire fighting detector then;
B, wireless fire-fighting gateway are collected the data message in the wireless Fire Net, by serial ports information are sent to the fire-fighting controller according to fire-fighting controller compatible message form;
Corresponding processing analyzed and makes by c, fire-fighting controller to information;
D, fire-fighting controller can be controlled route, discern wireless fire communication net module automatically, arbitrarily the additions and deletions network node;
4, method according to claim 3 is characterized in that in described step a, the input signal of fire fighting detector comprises smokescope, temperature, and electric weight and switching value comprise following three kinds of interfaces:
A, warning, early warning signal input interface: two I/O mouths are provided, and described I/O mouth is by the 10K resistance eutral grounding, and high level is imported;
B, digital signal input interface: adopt the UART interface, the agreement baud rate;
C, analog level signal input interface: provide one tunnel 8 A/D input interface, its reference voltage (Vrf+ and Vrf-) scalable.
5, method according to claim 3 is characterized in that the message format in described step a is followed successively by from left to right: heading, type of message, address, type, data, telegram end.
6, method according to claim 3 is characterized in that in described step a, and described wireless network transmissions is taked the transmission of 8bit data mode, and transmission mode has three kinds: timed sending, the output of patrolling and examining and report to the police, wherein:
Patrol and examine: certain network node sends search request to it, then sends;
Timed sending: regularly send status information, for the controller record data to network node;
Report to the police and export: when surpassing early warning or alarming threshold value, initiatively send.
7, method according to claim 3 is characterized in that the data message that the wireless fire-fighting gateway among the described step b is collected in the wireless Fire Net is by utilizing coupled wireless communication module to realize as acquisition node.
8, method according to claim 3 is characterized in that analysis described in the described step c and corresponding the processing comprise:
When the no condition of a fire:
A1, analysis current time, probe address, environment temperature, detector electric weight, smokescope value;
B1, with above-mentioned data respectively deposit in system database for the inquiry;
C1, the synchronous display status information of LCD display;
When the condition of a fire occurring:
A2, analysis current time, probe address, environment temperature, detector electric weight, smokescope;
B2, startup siren, the prompting condition of a fire occurs;
C2, startup linkage, self-extinguishing and guide crowd evacuation;
D2, deposit above-mentioned data in system database and print;
E2, the synchronous display status information of LCD display.
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