基于悬臂梁调谐技术的光纤光栅无源振动监测  

Passive Fiber Bragg Grating Sensor for the Mechanical Vibration Monitoring Based on Cantilever Beam Tuning Technology

作　　者：柳春郁[1,2] 余有龙[1] 张昕明[1] 赵洪霞[1] 高应俊[3] 

机构地区：[1]黑龙江大学光纤技术研究所 [2]中国科学院西安光学精密机械研究所,西安710068 [3]中国科学院西安光学精密机械研究所

出　　处：《光子学报》2003年第9期1067-1069,共3页Acta Photonica Sinica

基　　金：国家自然科学基金委员会与中国节能投资公司联合研究基金(批准号 :6 0 1770 2 9);黑龙江省 0 1年杰出青年基金;黑龙江省教育厅 0 3年科技项目资助(批准号 :10 5 31Z0 10和10 5 31132 )

摘　　要：采用匹配光纤光栅设计了一种结构简单的振动信号无源监测装置 该装置利用悬臂梁调谐技术能够将微小振动信号转化为光电探测器可探测的光强信号 ,利用示波器实现实时监测 实验中对振幅为 3mm的简谐振动信号进行了监测 ,测量结果与振动频率一致 ,可测量 7～ 2 0Hz的振动 ,信噪比不低于 14 .9dB 监测频率受限是因为悬臂梁的性质 ,如采用金属材料或者采用齿轮组对转子进行减速 。Utilizing a couple of fiber Bragg gratings, a simple structure device was presented for the passive monitoring vibration. Based on an isosceles triangle cantilever beam tuning technology, microvibrations could be converted into light intensity signal that could be detected by a photo electro detector. Using an oscilloscope, the passive monitoring was attained; In the experiment, harmonic vibrations with 3 mm amplitude were monitored. The experiment results agreed with the real value.7～20 Hz vibrations could be detected and the SNR was more than 14.9 dB. The detect frequency was limited by the nature of the cantilever beam. If a metal beam or deceleration device was used, it was possible to detect higher frequency.

关 键 词：悬臂梁 调谐技术 布喇格光纤光栅 无源振动监测 振动信号 光电探测器 光纤传感器 

分 类 号：TN253[电子电信—物理电子学] TP212.1[自动化与计算机技术—检测技术与自动化装置]