Design And Implementation Of Wireless Sensor Network Node For Meteorological Observation

With the development and application of fieldbus and wireless communications technology, the automation and informatization level of meteorological observation technology is also improving. As an emerging information technology, wireless sensor networks has been successfully applied in areas such as agriculture, transportation and smart home recent years, which has aroused great attention of meteorological departments, relevant documents clearly indicated to promote the application of wireless sensor network in meteorological observation system. However, at present, the application of wireless sensor network in meteorological industry, special hardware and software research and demonstration network construction is still in the initial stage, although the concepts has presented, the specific research and practice is basically in the blank. Therefore, developing meteorological observation of wireless sensor network node and information processing system has important and positive significance in promoting the wireless sensor network applications in the meteorological sector, establishing new meteorological data standard and the transfer standard. In this thesis, a kind of wireless sensor network node is designed and implemented aiming at the special application requirements of the meteorological industry in support of Industrial support plan of Science and Technology Department of Jiangsu Province.This thesis delved into existing wireless sensor network hardware platform, operating system and routing protocol, then according to the actual demand of meteorological applications, design and implementation of a wireless sensor networks node for meteorological observation. The hardware system of node includes processing and communication module, power supply module and sensor module. Processing and communication module is responsible for system control, data processing and radio frequency data transmission; power supply module is responsible for the battery charge and discharge management, as well as the transform of suitable working voltage for other modules; the sensor module achieves collection of temperature, humidity, and other meteorological elements. The software system of node is implemented based on TinyOS operating system. On the foundation of successful porting of TinyOS to CC2530platform, meteorological sensor driver such as temperature, humidity and air pressure was developed, then design and implementation of a bi-directional, multi hop routing protocol which support data aggregation and command issued based on LEPS routing protocol. At the end of the thesis, a test of hardware performance, driving program and network capacity is gived, and the test results are analyzed and discussed.The node described in this thesis, is reached the initial design goal in communication distance, data precision and network capacity. Due to the advantages of low power consumption, low cost, ease of deployment and data transmission stability, the node has a certain practical significance and value in the meteorological observation system.