Abstract
To deal with various traffic situations, traffic information collection, transmission and process is key technologies in ITS system. The development and application of traffic information collection system is widely used in developed country, while it is just at the very beginning stage in our country, possessing broad application foreground. In this paper, wireless magneto-resistive sensor network node is designed for traffic information collection system, and a set of traffic information collection algorisms for system is proposed, including traffic flow detection algorism based on low pass filter, vehicle speed detection algorism and vehicle recognition algorism. HMC1052 form Honeywell and NVE GMR magneto-resistive sensor collecting sample database are adopted in simulation, whose results proves that traffic information collection node could help to obtain information accurately, as traffic flow, vehicle speed, roadway occupancy rate, etc.
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