Design Of Remote Data Access Platform Based On Wireless Sensor Network And Study Of Related Problems

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 article is studying design of remoter data access platform based on wireless sensor network. 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".The concrete works are the following:We have improved the open-source Zigbee protocol stack which Microchip company provide for free. According to the actual needs of the project, we have done customized development based on the Zigbee protocol stack. By adding some features, the improved protocol stack suitable for the project needs. In this system, we have completed the WSN networking of the star topology and the cluster tree topology. At the same time, the process of routing data in cluster tree has been carefully studied. Through repeated testing, we verify the cluster tree network routing data and find the limitations of network routing at the same time.This paper studied the relevance of supporting technology in wireless sensor network. We introduced a series of solutions aiming at crucial issue of node energy saving in detail. According to the indicator, this paper proposed cluster head node power control technology based on the Huffman algorithm, analyzed the merits of the technology from the qualitative point of view and gives briefly the results of quantitative analysis.Design Remoter Data Access Platform based on Wireless Sensor Network iWSN. Through the software platform,we can monitor the operation of wireless sensor networks deployed in the monitoring field. By visualization interface of software platform, the current network topology, network size, node status can be show. iWSN send data acquisition command as specified format to RFD, and display received data which send by RFD. At the same time, Store received data to the database table and users query historical data. iWSN provide 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.