Study Of Data Access System Based On Wireless Sensor Network

The WSN is a self-organized distributed network system which is composed of a mass of tiny sensors nodes that has the sensation ability. The wireless sensor network node which deployed in farmland transfers data to remote PC through GPRS terminal, we can access data of monitoring field in the distance. This research was supported by Agricultural Science and Technology Achievements Transformation Fund Programs of Anhui Province under grant 2007GB24910458 named"Pilot test on agricultural real-time information acquisition and digital management system".This article is studying design of remoter data access platform based on wireless sensor network.The concrete works are the following:We have designed the hardware of data access system based on wireless sensor network.It includes power modules and interface modules. We have studied the power EMI,filter and commutating technology.We also design the uniform interface of sensers.For example the uniform current transfer voltage module and analyse the conversion accuracy,etc.We have introduced the Zigbee protocol stack. According to the actual needs of the project, we have done customized development based on the Zigbee protocol stack to suitable for the project needs. In this system, we have used the cluster tree topology of the WSN network to increase coverage area. Through repeated testing, the systerm software applicates good.Design Remoter Data Access Platform based on Wireless Sensor Network. Through the software platform,we can monitor the operation of wireless sensor networks deployed in the monitoring field. It also have function of command sending,data getting, storing and display.At the same time, it also provides the alarm function. When the value of some parameters above or below the alarm threshold, warning will be given and timely decision can be made.