摘要
光纤光栅(FBG)传感以其强大的优越性受到了社会的广泛关注,波长编码信号解调是实现光纤光栅多参量、多点分布式传感网络的关键技术。针对几种典型的光纤光栅解调方法做了简单介绍,重点分析了压电陶瓷在干涉解调系统中的调相测量作用。通过改变干涉系统的臂长差来产生一个动态的干涉信号,使干涉信号在时域上获得延伸,将包含被测传感信息的波长信号转变成相位信号;并用非平衡Mach-Zehnder干涉解调系统检测了应变信号,取得了较好的实验效果。实验测得系统的相位检测灵敏度为0.82(°)/με,可用于静态应变和动态应变的检测。
The fiber Bragg grating sensor with many intrinsic advantages has been received wide attention,and the wavelength-encoded signal demodulation is one of the key techniques to realize the fiber grating multi-parameter,multi-point distributed sensing network.The development of the signal demodulation techniques was summarized.Several kinds of fiber Bragg grating sensing demodulating methods were introduced in this paper.The phase modulation role of the piezoelectric ceramics in the interferometric demodulation system was analyzed.By changing the arm length difference of the interferometric system to generate a dynamic interference signal,which made the interference signal obtain an extension in the time domain,the FBG wavelength signal containing the measured sensing information was translated into the phase signal.The strain signal has been measured by using an unbalanced Mach-Zehnder interferometer.The experiment demonstrated that the phase measurement sensitivity of this system has been up to 0.82（°）/με and the system can be used to measure the static strain and the dynamic strain.
出处
《压电与声光》
CSCD
北大核心
2010年第6期942-945,共4页
Piezoelectrics & Acoustooptics
关键词
光纤光栅
压电陶瓷
干涉解调
应变传感
fiber Bragg grating（FBG）
piezoelectric ceramics
interferometric demodulation
strain sensing
