一种全向震动探测传感器设计

Design of Omnidirectional Vibration Detecting Sensor

针对地下分布式震源定位过程中无法有效获取震动信号矢量信息的问题,本文介绍了一种全向震动传感器,通过该传感器能够有效获取全向震动信号的矢量信息.该传感器以MEMS加速度计作为核心探测单元,包括三维震动探测单元、信号调理单元和电源单元;采用球形结构设计外壳,内部硬件电路通过灌封工艺保证与外壳结构一体化.经信号仿真和野外试验测试,该传感器能够有效获取全向震动信号的矢量信息,在地下震动测试领域有着非常重要的工程应用价值.

This paper introduce the omnidirectional vibration sensor based on MEMS three accelerometer aiming at the problem that the tradition vibration sensor cannot acquire effectively the vibration signal vector information, in the process of underground distributed passive localization. It has MEMS accelerometer as the core detection unit, including three dimensional vibration detection unit, signal conditioning unit and power supply unit. Spherical structure is used to design the shell of sensor, and the internal hardware circuit is inte- grated with the shell structure through the filling and sealing process. The simulation and field experiments show that this sensor can effectively get omnidirectional vibration signal vector information, and has very im- portant engineering application value