Implementation Of Environment Monitoring System Based On ZigBee Wireless Sensor Network

With the environmental problems becoming the focus of public attention,the application of environmental monitoring technology to obtain environmental information has become an important means to protect the environment.In view of the defects of traditional environmental monitoring technology,such as low intelligence and complex network wiring,an environmental monitoring system designed by Wireless Sensor Network(WSN)technology has a lot of advantages,including low cost,flexible deployment,large coverage and high reliability.In this thesis,WSN technology is used to build sensor network in a number of environmental areas,and a monitoring system is designed to cover multiple regions and collect various environmental information.Firstly,an overall scheme of the environmental monitoring system is given.The system chose four kinds of scenes to monitor and sensors are deployed in indoor living areas,outdoor buildings,outdoor open environment and offshore observation area,which mainly collect environment parameter of air and sea water.The system chooses ZigBee technology to realize the construction of sens or network,and GPRS protocol is used to perform remote transmission to realize the information interaction between sensor network and the Internet.Secondly,there are two parts in the system: hardware system and software system.The hardware system design mainly includes the selection of sensor modules and the hardware design of the nodes within the system.Applying the CC2530 of TI as the solution of ZigBee to design the network hardware platform under each scene,the remote connection problem of the sensor network is solved by convergence node that integrated two communication modules of ZigBee and GPRS.The software system design consist of node software design and data processing center software design.The development of node software is based on ZigBee protocol stack software according to the actual monitoring needs of different sences and the function of different types of nodes in the network.The data processing center software runs on the remote server.The system uses Qt to design the data processing center software of the server side.It can receive the connection of multiple monitoring scenes clients at the same time,and classify the uploaded sensor data,and finally store them in the MySQL database.Finally,aiming at routing overhead and transmission delay problems existing in the routing algorithm of ZigBee network in the system,an E-ZBR improved algorithm based on energy decision is proposed and simulated through the NS2 software.The simulation results show that compared with the ZBR algorithm of ZigBee network in the system,the algorithm can reduce routing control-overhead of network and drop network delay and packet-loss-rate.