光纤智能材料在振动传感器中的应用

摘要

针对传统振动传感器不适应大规模组网监测及振动信号的无中继远距离传输的问题,设计研制了一种新型的基于光信号并适宜信号远传的匹配滤波光纤光栅振动传感器.该传感器结构简单,匹配滤波环节少,生产简便.实验室性能测试结果表明,传感器响应频率与测试频率一致,信噪比高,满足桥梁低频响应的检测要求.实桥监测结果验证了其信号远距离传输的可靠性及对结构低阶频率的良好识别效果.%Due to the shortcomings of the existing vibration sensors which usually need signal relay transmission for large-scale network monitoring, a new type FBG-based vibration with less matched filtering process is designed which has a simple structure and convenient for production. The test results in lab show high signal-noise ratio and good consistent between response frequency and test frequency which can meet the bridge low frequency test requirement in-suit. Also the transmission reliability over a long distance and low order detection effect are verified by a real bridge monitoring results.