光纤传感系统.pdfVIP

_______________________________________________________________________________ 410 工程与技术科学基础学科 Data fusion in multi-parameter measurement of optical fiber sensors system * Jiang Junfeng, Liu Tiegen , Zhang Yimo, Sun Jie, Li Chuan, Ding Sheng (College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Key Laboratory of Opto-electronics Information and Technical Science(Tianjin University), Ministry of Education, Tianjin, 300072, China ABSTRACT Multi-parameter measurement is important for building health monitoring. In this paper, we use fiber Bragg grating(FBG) and extrinsic Fabry-Perot interferometer(EFBI) sensor to realize the measurement of strain, temperature and vibration. A universal demodulate method, which combines the low coherence interference demodulation of EFBI and fiber Fourier transform demodulation of FBG, is proposed. Thus it is possible to extract the signals from FBG and EFBI parallelly with only a Michelson interferometer. A data fusion model is established to process the origin data to get more precise results and distinguish the different parameters. The system is tested on a equi-intensity cantilever, and the results of experiment show that strain and temperature can be obtained efficiently. Keywords: Data fusion ； fiber Bragg grating, ；extrinsic Fabry-Perot interferometer ； multi-parameter measurement, ； strain,；temperature 光纤传感系统 江俊峰，刘铁根，张以谟，孙杰，李川，丁胜 （天津大学精密仪器与光电子工程学院，教育部光电信息与技术重点实验室） 摘要：多参数测量对建筑健康监测至关重要。本文使用光纤布拉格光栅（FBG ）和非本征型法布里－珀罗干涉(EFBI) 传感器实现了对应变，温度和振动的测量。提出了一种新的解调方法，该方法综合了非本征型法布里－珀罗干涉 仪（EFBI ）的低相干信号解调和光纤布拉格光栅（FBG ）的傅立叶传输信号解调方法各自优点。因此，仅用一 个迈克尔逊干涉仪就能同时提取这两种信号。为了得到更精确的结果和分辨不同的参数，建立了一个数据融合模 型来对原始信号进行处理。通过在等强度梁上的试验，结果显示能够有效完