Abstract
By detecting the vibration of bridge deck, the information of passing vehicles can be obtained indirectly, which is of great significance to grasp the dynamics of the enemy. In this paper, a micro-power wireless vibration detection terminal is designed. In order to reduce the overall power consumption of the terminal, which use two sensors, one is spring switch and another is acceleration sensor. When no vehicle passes by, the terminal is in a dormant state. When a vehicle passes by, the spring switch wakes up the CPU and the acceleration sensor to collect data. ZigBee network is used for data transmission, which has the advantages of low power consumption and ad hoc network. Experiments show that the average power consumption of the terminal is less than 7 mW. If the terminal is powered by 3.6v, 36AH lithium battery, In theory, it can work for at least two years.