基于MEMS加速度计的混凝土内部缺陷检测系统

摘要

A fast detection algorithm based on MEMS three aecelerometer is presented and corresponding hardware system is built up, aiming at the problems of low accuracy, complex detection exists in the traditional single point cable detection mode. MEMS accelerometer is used as vibration sensor,the FPGA is used as wireless sensor network node control core in this system. By 2.4 GHz band, it wireless communicate with upper computer. The experiment shows that this system can quickly and effectively detect material internal flaws and precision of defecting position is increased by 13.3 ％ than traditional single point cable testing equipment.%针对冲击回波法进行混凝土内部缺陷检测时,传统的单点有线检测方式存在精度低、检测复杂的问题,提出了一种基于MEMS三轴加速度计的快速检测算法,同时搭建了相应的硬件系统.该系统节点采用MEMS加速度计作为拾振器,利用FPGA作为无线传感器网络节点的控制核心,通过2.4 GHz ISM频段与上位机进行无线通信.经实验测试,系统能够快速有效检测材料内部缺陷,并对缺陷位置的定位精度比传统单点有线检测设备提高了13.3%,在无损检测领域具有重要的工程应用价值.