Design Of Data Acquisition System Based On Wireless Sensor Network

The traditional wiring data acquisition system on single-point measurement is unable to acquire the precise data within the monitored region , and unable to meet accurate measurement requirements. Combining wireless sensor networks with the advantages of distributed multi-point measurement and the technology of data fusion, the paper researches on the environmental data acquisition system based on wireless sensor network based on former researches.The main works are as follows:1. A framework of temperature and illumination environmental data acquisition system based on wireless sensor network is proposed based on research on the technology of data fusion for wireless sensor network.2. In view of asynchronous measurement data of every sensor node, an improved data level fusion algorithm based on weighted algorithm is proposed. Experiment results have shown that the system can exthend spatiotemporal visibility, and can monitor the region to achieve accurate measurement.3. Methods of recognition node for abnormal temperature or illumination and methods of judgement aberrant event are dicussed. Experiment results have shown that the system can recongnize abnormal node at the time of abrupt changes of temperature or illumination, can map out temperature and illumination of the spatial distribution, and can achieve early warning target.