FBG传感器和电阻应变仪的振动监测特性-红外与激光工程.PDF

第42 卷第3 期 红外与激光工程 2013 年3 月 Vol.42 No.3 Infrared and Laser Engineering Mar.2013 FBG 传感器和电阻应变仪的振动监测特性 龚华平，杨 效，屠于梦，宋海峰，董新永 ( 中国计量学院 光电子技术研究所，浙江 杭州 310018) 摘 要 将光纤布拉格光栅(FBG)传感器和电阻应变片固定在等强度梁上，研究了两种传感器的振动 监测性能，总结比较了其优缺点。通过固定在等强度梁末端的电机来产生振动，测试了 FBG 传感器和 电阻应变片监测到随时间变化的振动信号，并分析了振动信号经傅里叶变换(FFT) 的频谱图。实验结 ， ，但是 果表明 FBG 传感器和电阻应变片监测到振动信号的时域图基本一致 FBG 传感器监测到振动 信号经 FFT 变换的频谱图出现较明显的二次谐波和三次谐波，电阻应变仪监测到的频谱图出现的谐 波较弱。在实验中还观察到，在有电磁干扰情况下，电阻应变仪监测不到振动信号，而FBG 传感器正 常工作，不受电磁干扰。 ； 关键词 光纤传感器 光纤布拉格光栅； 电阻应变片； 等强度梁； 振动监测 中图分类号 O436 文献标志码 A 文章编号 1007-2276 (2013) 03-0810-04 Vibration detection characteristics of FBG sensor and resistance strain gauge Gong Huaping, Yang Xiao, Tu Yumeng, Song Haifeng, Dong Xinyong (Institute of Optoelectronic Technology , China Jiliang University , Hangzhou 310018, China) Abstract: Fiber Bragg grating (FBG) senso r and resistance strain gauge sensor were fixed on the uniform strength beam. Vibration detection characteristics of two kinds of sensors were investigated. The advantage and disadvantage of two kinds of sensors were compared. Vibration was caused by a motor which was fixed at the end of uniform strength beam. The vibration signal in time domain was measured, which was monitored by FBG sensor and resistance strain gauge sensor simultaneously, and the frequency spectrum was analyzed from the vibration curve through FFT. The results show that the vibration graph monitored by FBG sensor is cons