The Design Of Wireless Sensor Networks Detection System Based On Wi-Fi

With the rapid development of the high-speed railway in our country, aerodynamics effect has been caused when high-speed train is in motion, which have adverse effects on train's safety, economical efficiency, passenger's comfort and environment. Therefore, it is necessary to research high-speed train aerodynamics.The thesis achieves the design of wireless sensor network detection system solution based on wireless sensor network technology and testing technology. The system consists of wireless sensor node, aggregation node and terminal node. The thesis mainly designs the wireless sensor node, which includes sensor module, micro-controller module, data acquisition module, storage module, communication module and power module. STM32 form ST Corporation is adopted as micro-controller and low power Wi-Fi chip GS1010 form GainSpan Corporation as wireless communication controller. Embedded real time operating system RT-Thread is transplanted and application software is builded, data acquisition, storage and communication function is achieved, the design of the system is accomplished.The thesis research wireless sensor network detection system based on Wi-Fi, the main work is described in details as follows:1. Describe the background and significance of high-speed railway aerodynamics experiment briefly. Detection system solution is selected suitably and wireless sensor network detection system is designed.2. Analyse the detection system base---wireless sensor network technology and its development and application. Compare various kinds of wireless technology and select Wi-Fi as wireless sensor network solution.3. Design the whole wireless sensor network structure, including wireless sensor node, aggregation node and terminal node. Research the wireless sensor node in terms of hardware and software, in cosist of sensor module, micro-controller module, data acquisition module, storage module, communication module and power module.4. Debug the system and apply it in the high-speed train aerodynamics experiment.