| Due to its facility when large-scale decorating, the wireless sensor network has been widely used in military、environment monitoring and traffic control. Most of the existing wireless sensor networks are powered by battery. It has become a restriction of the applying of the wireless sensor network because of some congenital defect itself, such as unclean for the environment and needs maintaining. So use the micro energy system that can change the energy coming from the environment into electricity to drive wireless sensor node has gradually become an ideal solution. Researching on wireless sensor network based on self-powered wireless sensor nodes is important.On the basis of our previous studies, this dissertation did some research on some of the key techniques of the wireless sensor network consist of wireless temperature/humidity/wind speed sensor node driven by wind energy harvester. We realized self-powered measurement on temperature/humidity and wind speed, reduce the average power consumption by optimizing circuit design and completed the design of wireless sensor network, accomplished the basic function of data collection. The research activities mainly include:(1) Investigated and analysed the recently study on wind energy harvester、self-powered wireless sensor node and wireless sensor network;(2) Completed the design of the wireless sensor nodes, including the self-powered wireless sensor node and the coordinator. The designing work mainly including the assembling of the wind energy harvester, the overall design of the node, the choice of the component, the design of the schematic and PCB, the software of the node. And made a low-power design from both hardware and software;(3) Completed the wireless sensor network and choose the topology of the network. Completed the software of self-powered wireless sensor node and coordinator based on Z-Stack.(4) The testing result shows, the end device can send the sensor data periodically under the current test environment, the maximum stable communication distance outdoors is 200 m,the limitary communication distance is 230 m. The coordinator can form a network normally, as well as communicate with PC. The network data transfer functions well and stable, there is no data conflict in the small-scale network. |
