CN102223733A - Intellectualized uptown method under wireless sensor network based on radio frequency identification - Google Patents
Intellectualized uptown method under wireless sensor network based on radio frequency identification Download PDFInfo
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Abstract
The invention provides a realization method for intellectualized uptown method under a wireless sensor network based on radio frequency identification. The method is characterized in that the system comprises an RFID sensing node, a mobile read and write line, a wireless sensor network gateway, mobile terminal equipment, system software and terminal software. The sensing node and the mobile sensing equipment collect label information through the RFID read and write line. A wireless sensing module sends the data to the wireless sensing network gateway equipment. The gateway equipment transmits the data by an infrastructure to the terminal equipment through realizing a seamless switch between the wireless sensing network and an ethernet or a wireless local area network. In the covering range of the wireless network, relevant mobile equipment such as a PDA, an intelligent cellphone can be conveniently used to obtain needed information. Eventually an intellectualized uptown system under the wireless sensor network based on the RFID is realized.
Description
Technical field
The present invention relates to a kind of design and implementation of the wireless communication system based on wireless sensor network, and the realization of this system on the RFID terminal reader, both organically combine the intelligent garden system based on the RFID technology that constitutes under the wireless sensor network framework, belong to wireless sensor network, RFID, the crossing domain of radio communication.
Background technology
RFID (radio-frequency (RF) identification) is a kind of non-contacting automatic identification technology, its basic principle is to utilize radiofrequency signal and space lotus root to close (inductance take off close or electromagnetic coupling closes) transmission characteristic, realization is to being identified the automatic identification of object, have the unrivaled advantage of many traditional automatic identification technologies, as noncontact, distance, read-write, contain much information, need not manual intervention, multiple target discerns etc. simultaneously.
Electronic tag is divided into active electronic label and passive electronic label, and active electronic label includes battery, and the system that is made of active electronic label is the electromagnetic wave that active rfid system one electronic tag initiatively sends a certain frequency, is read by reader.The decipherment distance of active electronic label is far away, can reach tens meters to rice up to a hundred.Because the life-span of battery is limited, so the life-span of active electronic label also is restricted.Passive electronic label does not then have internal electric source, and during work, the electromagnetic wave that relies on reader to send obtains energy, and the information in the label is sent. and the decipherment distance of passive electronic label is shorter.For Passive RFID system, when reader is met the RFID label, just send electromagnetic wave, around label, form electromagnetic field, label obtains energy activated microchip circuit from electromagnetic field, convert the information (UID or user data) that is stored in the label to electromagnetic wave, send to reader then, reader converts it to related data again, send to transfer of data and treatment system then, thereby these data are managed and control. for the active rfid system, then be the electromagnetic wave that initiatively sends a certain frequency by electronic tag, read by reader.
The brand-new just network technology of radio sensing network, it is by having perception, the network that the sensor node of processing and wireless communication ability forms by the self-organizing mode, it can make us extend to more wide interactive space, obtain to center on our dynamic state information on every side, realization is for the peripheral world more accurate and deep understanding and control, thereby in military affairs, environment, healthy, family, traffic, manufacturing industry, commercial, facilities management, transportation, safety, there is wide application prospect in fields such as space exploration and disaster rescue, to people's live and work mode, industry development and change produce revolutionary impact.
Radio sensing network combines multiple advanced technologies such as microelectric technique, embedded computing technique, modern computer network technologies and wireless communication technology, distributed information processing, node in the network can be monitored mutually collaboratively in real time, the information of various environment or monitoring target in perception and the collection network overlay area, and it is handled, information after the processing is sent out by wireless mode, and sends the observer to the network mode of organizing multi-hop certainly.Wireless sensor network will be in logic information world merge into one with objectively physical world, thereby realize physical world, the connection of calculating the world and the human society ternary world.The wireless senser network combines multi-disciplinary cutting edge technology as a brand-new research direction of current information and computer realm, has been subjected to the extensive concern of academia and industrial quarters now.
As the hardware carrier of radio sensing network platform, the design of wireless sensor node need be followed microminiaturization, low-power consumption, numerous factors such as autgmentability is strong, and stability is high, and fail safe is good, and cost is low.Yet, as a kind of technology of emerging appearance, set up one run well, wireless sensor network that robustness is good still is faced with many challenges.And because its some unique properties, the method for designing of wireless sensor network and the method for designing of prior wireless network have a great difference.For example, because the sensor node in the sensor network is densely distributed, so need large-scale data management and treatment technology.In addition, WSNs in actual applications (Wireless Sensor Networks) can not with one independently the communication network form exist.Data monitored need send to the top service device and analyzes, handles in the network, simultaneously top service device end Internet need be issued to related command node among the WSNs to the WWW service of network, FTP service etc., and also needs the shared information of communicating by letter between dissimilar WSNs nodes.This all need WSNs to realize and different type network between interconnected.
Gateway is taken on internetwork protocol converter in wireless sensor network, the network router of different network type, and whole network data is assembled, and key players such as stores processor become the indispensable tie that connects between network.Traditional gateway utilizes aggregation node to combine with PC and realizes, utilizes PC to be connected with external network the data of wireless sensor network are carried out long-distance transmissions.
The present invention is integrated together RFID technology and wireless sensor network technology effectively by rfid interrogator is dissolved in the radio sensing network as communication node,, realized under a kind of novel wireless sensor network intelligent garden system based on RFID.
Summary of the invention
Technical problem: the objective of the invention is to lack scientific and effective monitoring management at present large-scale garden, can't utilize shortcomings such as the new technology and the network interconnection, propose a kind of implementation method based on the intelligent garden system of RFID under wireless sensor network, this system is made of RFID sensing node, wireless sensor network gateway, mobile terminal device, systems soft ware and terminal software five parts.Five parts are cooperated mutually and have been realized integral type service from turnover garden personnel's information gathering, transmission, network switch to end user query, warning.Final purpose is to develop hommization, intellectuality, and high-performance, than the strongly-adaptive ability, the intelligent garden system of high integrated level.
Technical scheme: the intelligent garden system under a kind of wireless sensor network proposed by the invention based on RFID, by information such as RFID sensing node collection turnover garden personnel, vehicles, be transferred to the wireless sense network gateway device by wireless sense network, realize the seamless switching of wireless sense network and Ethernet, WLAN (wireless local area network) by gateway device, information data is passed on the terminal equipment by infrastructure network, and, realized the intelligent management of whole garden in conjunction with the relevant terminal software systems.
This system is made of RFID sensing node, mobile read write line, wireless sensor network gateway, mobile terminal device, systems soft ware and terminal software.Sensing node and mobile sensor equipment are gathered label information by rfid interrogator, transfer data to the wireless sense network gateway device by wireless sensing module then, gateway device is by realizing the seamless switching of wireless sense network and Ethernet, WLAN (wireless local area network), data are passed on the terminal equipment by infrastructure network, within the wireless network coverage, can both use relevant mobile device to obtain needed information easily, finally realize the intelligent garden system under a kind of wireless sensor network based on RFID.
Performing step of the present invention is as follows:
Tracking and management system under a kind of wireless sensor network of step 1) based on the intelligent garden of RFID, it is characterized in that the radio-frequency (RF) tag terminal is linked to each other with equipment, personnel or vehicle etc., gather label information by read-write equipment, and these signals are sent to gateway by wireless senser, re-send to background server, can judge the virtual condition of garden from the signal of accepting, personnel's positional information, the situation etc. of parking of vehicle is in time reported to the police to abnormal conditions;
Step 2) design is based in the wireless senser architecture based on RFID off the net.The application of native system is satisfied in the transmission of wireless sensor network from the sensing node to the gateway.The embodiment structure chart of native system as shown in Figure 1;
Design of step 3) RFID sensor network architectural framework and realization: sensing layer, middleware layer and service layer, as shown in Figure 2;
Sensing layer: in the network that RFID/WSN in the real world makes up various entities are arranged,, after they gather information,, import data into data management module to middleware layer through the context-aware reasoning such as people, vehicle, sensing equipment etc.;
Middleware layer: this layer is nethermost to be data management module, handles the data that sensing layer is sent into, other modules of giving middleware again;
Service layer: the needed services of user such as public information, monitoring alarm are provided;
The step 4) its database design realizes: a part is the server end that operates in central server, for application program presents the relational database of integrated rfid and WSN, accepts various types of SQL query.Another part is the embedded database engine that operates on the node.Can cooperate mutually between the node, finish some local query requests.This database software mainly comprises the inquiry Executive Module, data management module, operation operator module, mixed-media network modules mixed-media and memory management module.As shown in Figure 3, the inquiry Executive Module is the heart of entire database, calls other modules of management;
The design of step 5) sensing node and realization.Wireless sensor node among the present invention comprises following element: micro-control unit, sensing unit, radio frequency unit, communication unit, positioning unit and 6 parts of power supply unit are formed, as shown in Figure 4;
The energy supply of step 6) RFID sensor tag.The energy supply of wireless senser generally is that employing is battery powered, though be a kind of method of simple maturation, but the energy that battery provides is very limited, particularly concerning those enormous amount and the long-time occasion of using, the work of changing power supply almost is impossible, the development of RFID technology, for wireless sensor energy supply problem provides a kind of new method, promptly from environment on every side, obtain energy, this energy is to obtain from the electromagnetic field that reading and writing device antenna produces, and is not subjected to the influence of specific environment;
The realization of step 7) RFID data management function: data securing layer, affairs processing layer and enterprise's application layer, its architectural framework is as shown in Figure 5;
Step 8) planning required general function of finishing of gateway and key property index: gateway need be finished real time data reception, real-time Data Transmission, monitoring in real time, signal processing, the multiple function of polymorphic type protocol conversion, requirement has high system reliability and high integration, real-time analysis preferably and disposal ability, the transfer of data accuracy;
Step 9) is carried out the basic boom design of gateway: the gateway basic boom is made up of four levels, is respectively from bottom to top: functional part layer, device drive layer, embedded system kernel, application system level;
The overall construction drawing of step 10) design gateway hardware circuit: gateway should comprise following several module: kernel control module, protocol conversion module, 802.15.4 wireless communication module, JTAG programming and debugging module, outer memory module, infrastructure service and administration module, energy supply module, external network control and access module.Gateway hardware circuit overall construction drawing as shown in Figure 6;
The protocol conversion module of step 11) design gateway: gateway device obtains from Information Monitoring in the wireless sensor network by the 802.15.4 wireless communication module, and gradually by the inferior standardization data parsing of protocal layers from bottom to top.Gateway system software and support programs are according to its access network or service object's business and demand data, and according to the self-characteristic of sensing data, carry out processing, analysis, merge and extract, be met the polymorphic type heat transfer agent of condition, and offer TCP/IP and 802.11 protocol architectures that build on the systems soft ware, as its initial service source.Gateway node will be finished sequence of operations such as type of service is determined, Data Format Transform, Frame encapsulation according to the standard and the standard of this agreement, realize final access function by wireless interface module.Embedded gateway systems soft ware part is made up of three modules: utilize the Z-Stack protocol stack to realize the module of ZigBee coordinator function, the functional module of embedded TCP/IP and 802.11 agreements is simplified in realization, and the ZigBee message is converted into Ethernet and wireless local network packet module.On the basis that analysis and Control system, Z-Stack and TCP/IP, 802.11 agreements realize, gateway system and IEEE802.15.4/ZigBee network communication protocol level have been proposed, the application model of gateway system and Internet network communication protocol level.The gateway protocol transformation model as shown in Figure 7;
Control of step 12) external network and access module: the effect of this module is that gateway device is linked into the external infrastructure network, makes the data of being come by the wireless sense network transmission be able to send terminal equipment to by infrastructure network.Wireless sense network gateway device among the present invention provides Ethernet, multiple external network access way such as WLAN (wireless local area network).The present invention inserts WLAN (wireless local area network) with DM9000AEP network chip access network based on ethernet with the USB interface wireless network card;
The circuit design of step 13) gateway and realization: gateway circuit adopts the digitlization standard design, and element all adopts the SMD encapsulation of 0805 type, has realized the conversion between TTL signal and the RS-232 signal between being connected of gateway and PC serial ports; Gateway device has been set up the buffering between high speed signal and the low speed signal, adopts the strategy of two-ply wiring, is undertaken by the mode that hand wired and self routing combine;
The Design of System Software of step 14) gateway device: the harmonious operation of all real-time tasks of the system software controls of gateway device, system is according to mission requirements, carry out resource management, Message Processing, task scheduling, abnormality processing, and distribute priority, system is according to the priority of each task, dynamically switches and dispatches;
Terminal software design under the step 15) B/S pattern: utilize Web Service technology, the sensing data that RFID is collected is packaged into Web service and is published on the Web server, carrying out cross-platform information data obtains, by the Web service of this Web server of terminal browser access, can obtain needed information;
Step 16) design of the terminal software under the C/S model: utilize the Socket communication between local area network (LAN), obtain the real-time garden data of gateway transmission;
Step 17) information warning function design: when needs are reported to the police, terminal software will call serial ports note cat and net automatic transmission information by GSM, realize warning function.
Beneficial effect: there is following several big advantage in the intelligent garden system based on RFID under the wireless sensor network that the present invention proposes:
(1) the intelligent garden system under a kind of wireless sensor network proposed by the invention based on RFID, by information such as RFID sensing node collection turnover garden personnel, vehicles, be transferred to the wireless sense network gateway device by wireless sense network, realize the seamless switching of wireless sense network and Ethernet, WLAN (wireless local area network) by gateway device, information data is passed on the terminal equipment by infrastructure network, and, realized the intelligent management of whole garden in conjunction with the relevant terminal software systems.
(2) the present invention is by having studied the integrated abstract architecture of RFID and WSN, designed the three coating systems frameworks that comprise application layer, middleware layer and sensing layer.In sensing layer, by with rfid interrogator as communication node, RFID is dissolved in the radio sensing network, effectively RFID technology and WSN technology are integrated together, realized the wireless remote monitering of garden.
(3) gateway device can be linked into infrastructure network in several ways and transfer data to various terminal equipments, the monitor staff can carry out comprehensively, effectively, garden monitoring management easily; Can also utilize mobile sensor equipment to obtain required garden information; Within the wireless network coverage, also can be convenient for carrying relevant mobile device, as monitoring garden information such as PDA, smart mobile phones and collect warning information.
(4) the present invention utilizes Web Service technology at terminal software, realized the professional platform independence of software systems, the monitor staff need not to install any software, only need browser to carry out integral monitoring to the garden, and,, make the monitor staff to stay indoors by Web Service is published on the internet, on the device end that is linked into basic network, carry out remote monitoring.
Description of drawings
Fig. 1 is the system assumption diagram of intelligent garden system, has shown architecture of the present invention.
Fig. 2 is design of RFID sensor network architectural framework and realization.
Fig. 3 is that its database design realizes: a part is to operate in the central server end, and another part is the database engine that operates on the node.
Fig. 4 is the design and the realization of sensing node, has six parts.
Fig. 5 is the realization of RFID data management function.
Fig. 6 is wireless sense network gateway hardware architecture figure, has shown the formation of each module of gateway part.
Fig. 7 is the system protocol model of wireless sense network gateway, has shown the hierarchical system structure of gateway communication protocol.
Embodiment
System of the present invention has comprised RFID sensing node, mobile read write line, wireless sensor network gateway, mobile terminal device, systems soft ware and six parts of terminal software:
1, the function of RFID sensing node is in fixing station acquisition information, and by wireless communication module data is sent to gateway device by wireless sense network.Each node comprises micro-control unit, sensing unit, radio frequency unit, communication unit, positioning unit and 6 part compositions of power supply unit.。Node is arranged in the wireless sensor network of a self-organizing, and autonomous operation is given background server by network transmission data.All intelligent nodes are isomorphisms, therefore can use the advantages of simplicity and high efficiency data compression method.At last, one flexibly host-host protocol be necessary, at present preferably the most frequently used is exactly the ZigBee agreement.
2, the mobile read write line mobile PDA that can have the keeper to carry reads information to different places, reads the monitor message of the needs such as geographical location information that need and information is delivered to gateway by wireless sensor network.
3, the function of wireless senser gateway equipment provided by the invention is from the data of wireless sense network reception from RFID sensing node and mobile read write line, and data are transferred to each receiving terminal by infrastructure network.Gateway device of the present invention provides multiple modes such as Ethernet, WLAN (wireless local area network) to insert infrastructure network, compare on the network coverage, message transmission rate, stability of network and equipment cost performance with the conventional wireless sensor network gateway and all to have superiority, and overcome the limitation that hardware device is arranged, expanded the range of application of gateway device greatly.
4, mobile terminal device comprises that mobile phone, PDA, notebook computer etc. have the terminal equipment of mobility, and it can realize the required information of user function such as demonstration and historical query in real time in conjunction with terminal software.
5, systems soft ware comprise on the RFID sensing node based on the systems soft ware of TinyOS operating system and the gateway device based on the systems soft ware of (SuSE) Linux OS.The needed information of user is gathered in system software controls on RFID sensing node and the mobile read write line, and transmits by communication module; Each hardware module on the systems soft ware integrated dispatch gateway on the gateway device realizes the seamless switching between wireless sense network and WLAN (wireless local area network), cable LAN, the GSM net.
6, terminal software of the present invention has adopted the mode that two kinds of patterns of B/S (browser/server) and C/S (client/server) combine.For the service that needs obtain real time data, adopt C/S model, the monitor staff can pass through terminal software, obtains the real time data of garden, for example vehicle parking of garden management, concrete personnel's present position etc.; For the service that needs the inquiry of historical data, adopt the B/S pattern, provide Web Service service by application server as client, utilize Web Service, shielded the platform isomerism of client software, the monitor staff only need pass through any browser, can obtain the data, services that this Web Service is provided, and need not to consider specifically in which operating system platform the attendance situation of garden for example.In addition, when the monitor data unusual circumstance, software will call serial ports note cat and net automatic transmission information to the monitor staff by GSM, realize warning function.
Below in conjunction with accompanying drawing the present invention is described in detail.Should be clear and definite, following content only is used for describing the present invention and not as limitation of the present invention.
(1) tracking and the management system under a kind of wireless sensor network based on the intelligent garden of RFID, it is characterized in that the radio-frequency (RF) tag terminal is linked to each other with equipment, personnel or vehicle etc., gather label information by read-write equipment, and these signals are sent to gateway by wireless senser, re-send to background server, can judge the virtual condition of garden from the signal of accepting, personnel's positional information, the situation etc. of parking of vehicle is in time reported to the police to abnormal conditions;
(2) design is based in the wireless senser architecture based on RFID off the net.The necessary careful design of the antenna of rfid interrogator, so that can cover all labels in the scope, also to prevent the collision between the different reading and writing device antennas, intelligent node can be arranged in the wireless sensor network of a self-organizing, autonomous operation is given background server by network transmission data.All intelligent nodes are isomorphisms, therefore can use the advantages of simplicity and high efficiency data compression method.Agreement is used the ZigBee agreement.
(3) design of RFID sensor network architectural framework and realization: sensing layer, middleware layer and service layer,
A) sensing layer: in the network that RFID/WSN in the real world makes up various entities are arranged,, after they gather information,, import data into data management module to middleware layer through the context-aware reasoning such as people, vehicle, sensing equipment etc.;
B) middleware layer: this layer is nethermost to be data management module, handles the data that sensing layer is sent into, other modules of giving middleware again;
C) service layer: the needed services of user such as public information, monitoring alarm are provided;
(4) its database design realizes: a part is the server end that operates in central server, for application program presents the relational database of integrated rfid and WSN, accepts various types of SQL query.Another part is the embedded database engine that operates on the node.Can cooperate mutually between the node, finish some local query requests.This database software mainly comprises the inquiry Executive Module, data management module, operation operator module, mixed-media network modules mixed-media and memory management module.The inquiry Executive Module is the heart of entire database, calls other modules of management;
(5) design of sensing node and realization.
A) wireless sensor node among the present invention comprises following element: micro-control unit, sensing unit, radio frequency unit, communication unit, positioning unit and 6 parts of power supply unit are formed;
B) the energy supply of RFID sensor tag.The energy supply of wireless senser generally is that employing is battery powered, though be a kind of method of simple maturation, but the energy that battery provides is very limited, particularly concerning those enormous amount and the long-time occasion of using, the work of changing power supply almost is impossible, the development of RFID technology, for wireless sensor energy supply problem provides a kind of new method, promptly from environment on every side, obtain energy, this energy is to obtain from the electromagnetic field that reading and writing device antenna produces, and is not subjected to the influence of specific environment;
C) realization of RFID data management function: data securing layer, affairs processing layer and enterprise's application layer;
(6) design of gateway:
A) planning required general function of finishing of gateway and key property index: gateway need be finished real time data reception, real-time Data Transmission, monitoring in real time, signal processing, the multiple function of polymorphic type protocol conversion, requirement has high system reliability and high integration, real-time analysis preferably and disposal ability, the transfer of data accuracy;
B) basic boom that carries out gateway designs: the gateway basic boom is made up of four levels, is respectively from bottom to top: functional part layer, device drive layer, embedded system kernel, application system level;
C) overall construction drawing of design gateway hardware circuit: gateway should comprise following several module: kernel control module, protocol conversion module, 802.15.4 wireless communication module, JTAG programming and debugging module, outer memory module, infrastructure service and administration module, energy supply module, external network control and access module.
D) protocol conversion module of design gateway: gateway device obtains from Information Monitoring in the wireless sensor network by the 802.15.4 wireless communication module, and gradually by the inferior standardization data parsing of protocal layers from bottom to top.Gateway system software and support programs are according to its access network or service object's business and demand data, and according to the self-characteristic of sensing data, carry out processing, analysis, merge and extract, be met the polymorphic type heat transfer agent of condition, and offer TCP/IP and 802.11 protocol architectures that build on the systems soft ware, as its initial service source.Gateway node will be finished sequence of operations such as type of service is determined, Data Format Transform, Frame encapsulation according to the standard and the standard of this agreement, realize final access function by wireless interface module.Embedded gateway systems soft ware part is made up of three modules: utilize the Z-Stack protocol stack to realize the module of ZigBee coordinator function, the functional module of embedded TCP/IP and 802.11 agreements is simplified in realization, and the ZigBee message is converted into Ethernet and wireless local network packet module.On the basis that analysis and Control system, Z-Stack and TCP/IP, 802.11 agreements realize, gateway system and IEEE802.15.4/ZigBee network communication protocol level have been proposed, the application model of gateway system and Internet network communication protocol level.
E) external network control and access module: the effect of this module is that gateway device is linked into the external infrastructure network, makes the data of being come by the wireless sense network transmission be able to send terminal equipment to by infrastructure network.Wireless sense network gateway device among the present invention provides Ethernet, multiple external network access way such as WLAN (wireless local area network).The present invention inserts WLAN (wireless local area network) with DM9000AEP network chip access network based on ethernet with the USB interface wireless network card;
F) circuit design of gateway and realization: gateway circuit adopts the digitlization standard design, and element all adopts the SMD encapsulation of 0805 type, has realized the conversion between TTL signal and the RS-232 signal between being connected of gateway and PC serial ports; Gateway device has been set up the buffering between high speed signal and the low speed signal, adopts the strategy of two-ply wiring, is undertaken by the mode that hand wired and self routing combine;
G) Design of System Software of gateway device: the harmonious operation of all real-time tasks of the system software controls of gateway device, system is according to mission requirements, carry out resource management, Message Processing, task scheduling, abnormality processing, and distribute priority, system is according to the priority of each task, dynamically switches and dispatches;
(7) terminal software design under the B/S pattern: utilize Web Service technology, the sensing data that RFID is collected is packaged into Web service and is published on the Web server, carrying out cross-platform information data obtains, by the Web service of this Web server of terminal browser access, can obtain needed information;
(8) design of the terminal software under the C/S model: utilize the Socket communication between local area network (LAN), obtain the real-time garden data of gateway transmission;
(9) information warning function design: when needs are reported to the police, terminal software will call serial ports note cat and net automatic transmission information by GSM, realize warning function.
Claims (2)
1. the implementation method based on the intelligent garden system of radio-frequency (RF) identification under the wireless sensor network is characterized in that this system is made of RFID sensing node, mobile read write line, wireless sensor network gateway, mobile terminal device, systems soft ware and terminal software.Sensing node and mobile sensor equipment are gathered label information by rfid interrogator, transfer data to the wireless sense network gateway device by wireless sensing module then, gateway device is by realizing the seamless switching of wireless sense network and Ethernet, WLAN (wireless local area network), data are passed on the terminal equipment by infrastructure network, within the wireless network coverage, can both use relevant mobile device to obtain needed information easily, finally realize the intelligent garden system under a kind of wireless sensor network based on RFID.
2. the implementation method based on the intelligent garden system of radio-frequency (RF) identification under the wireless sensor network according to claim 1 is characterized in that its specific implementation method is as follows:
Step 1) links to each other the radio-frequency (RF) tag terminal with equipment, personnel or vehicle etc., gather label information by read-write equipment, and these signals are sent to gateway by wireless senser, re-send to background server, judge the virtual condition of garden from the signal of accepting, personnel's positional information, the situation etc. of parking of vehicle is in time reported to the police to abnormal conditions;
Step 2) design is based in the wireless senser architecture based on RFID off the net, and the application of native system is satisfied in the transmission of wireless sensor network from the sensing node to the gateway;
Design of step 3) RFID sensor network architectural framework and realization: sensing layer, middleware layer and service layer, sensing layer: in the network that the RFID/WSN in the real world makes up various entities are arranged, such as people, vehicle, sensing equipment etc., after they gather information, through the context-aware reasoning, import data into data management module to middleware layer;
Middleware layer: this layer is nethermost to be data management module, handles the data that sensing layer is sent into, other modules of giving middleware again;
Service layer: the needed services of user such as public information, monitoring alarm are provided;
The step 4) its database design realizes: a part is the server end that operates in central server, for application program presents the relational database of integrated rfid and WSN, accepts various types of SQL query; Another part is the embedded database engine that operates on the node, can cooperate mutually between the node, finish some local query requests, this database software mainly comprises the inquiry Executive Module, data management module, operation operator module, mixed-media network modules mixed-media and memory management module, the inquiry Executive Module is the heart of entire database, calls other modules of management;
The design of step 5) sensing node and realization, wireless sensor node comprise following element: micro-control unit, sensing unit, radio frequency unit, communication unit, positioning unit and 6 parts of power supply unit are formed,
The energy supply of step 6) RFID sensor tag comprises the energy harvesting device in the label, the signal that read write line sends in the communication, and label can therefrom obtain energy.
The realization of step 7) RFID data management function: data securing layer, affairs processing layer and enterprise's application layer,
Step 8) planning required general function of finishing of gateway and key property index: gateway need be finished real time data reception, real-time Data Transmission, monitoring in real time, signal processing, the multiple function of polymorphic type protocol conversion, requirement has high system reliability and high integration, real-time analysis preferably and disposal ability, the transfer of data accuracy;
Step 9) is carried out the basic boom design of gateway: the gateway basic boom is made up of four levels, is respectively from bottom to top: functional part layer, device drive layer, embedded system kernel, application system level;
The overall construction drawing of step 10) design gateway hardware circuit: gateway should comprise following several module: kernel control module, protocol conversion module, 802.15.4 wireless communication module, JTAG programming and debugging module, outer memory module, infrastructure service and administration module, energy supply module, external network control and access module;
The protocol conversion module of step 11) design gateway: gateway device obtains from Information Monitoring in the wireless sensor network by the 802.15.4 wireless communication module, and gradually by the inferior standardization data parsing of protocal layers from bottom to top; Gateway system software and support programs are according to its access network or service object's business and demand data, and according to the self-characteristic of sensing data, carry out processing, analysis, merge and extract, be met the polymorphic type heat transfer agent of condition, and offer TCP/IP and 802.11 protocol architectures that build on the systems soft ware, as its initial service source; Gateway node will be finished sequence of operations such as type of service is determined, Data Format Transform, Frame encapsulation according to the standard and the standard of this agreement, realize final access function by wireless interface module; Embedded gateway systems soft ware part is made up of three modules: utilize the Z-Stack protocol stack to realize the module of ZigBee coordinator function, the functional module of embedded TCP/IP and 802.11 agreements is simplified in realization, and the ZigBee message is converted into Ethernet and wireless local network packet module; On the basis that analysis and Control system, Z-Stack and TCP/IP, 802.11 agreements realize, gateway system and IEEE802.15.4/ZigBee network communication protocol level have been proposed, the application model of gateway system and Internet network communication protocol level;
Control of step 12) external network and access module: the effect of this module is that gateway device is linked into the external infrastructure network, makes the data of being come by the wireless sense network transmission be able to send terminal equipment to by infrastructure network; The wireless sense network gateway device provides Ethernet, multiple external network access way such as WLAN (wireless local area network), and the present invention inserts WLAN (wireless local area network) with DM9000AEP network chip access network based on ethernet with the USB interface wireless network card;
The circuit design of step 13) gateway and realization: gateway circuit adopts the digitlization standard design, and element all adopts the SMD encapsulation of 0805 type, has realized the conversion between TTL signal and the RS-232 signal between being connected of gateway and PC serial ports; Gateway device has been set up the buffering between high speed signal and the low speed signal, adopts the strategy of two-ply wiring, is undertaken by the mode that hand wired and self routing combine;
The Design of System Software of step 14) gateway device: the harmonious operation of all real-time tasks of the system software controls of gateway device, system is according to mission requirements, carry out resource management, Message Processing, task scheduling, abnormality processing, and distribute priority, system is according to the priority of each task, dynamically switches and dispatches;
Terminal software design under the step 15) B/S pattern: utilize Web Service technology, the sensing data that RFID is collected is packaged into Web service and is published on the Web server, carrying out cross-platform information data obtains, by the Web service of this Web server of terminal browser access, can obtain needed information;
Step 16) design of the terminal software under the C/S model: utilize the Socket communication between local area network (LAN), obtain the real-time garden data of gateway transmission;
Step 17) information warning function design: when needs are reported to the police, terminal software will call serial ports note cat and net automatic transmission information by GSM, realize warning function.
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