基于边缘滤波和阻尼衰减的FBG板材冲击能测量研究  

Research on impact energy measurement of FBG plate based on edge filtering and damping attenuation

作　　者：周建明 陶维俱 胡君辉[1] 范金英 曾志明 秦子雄[1] ZHOU Jianming;TAO Weiju;HU Junhui;FAN Jinying;ZENG Zhiming;QIN Zixiong(School of Physical Science and Technology,University of Guangxi Normal University,Guilin Guangxi 541004,China)

机构地区：[1]广西师范大学物理科学与技术学院,广西桂林541004

出　　处：《光通信技术》2020年第3期22-26,共5页Optical Communication Technology

基　　金：国家自然科学基金(61565002)资助;广西重点研发计划项目(AB18221033、AB17129027)资助。

摘　　要：为了探究光纤布喇格光栅(FBG)传感器对冲击能的新型实时解调方法,利用FBG边缘滤波法原理,对板材进行了冲击能大小的测量研究。对于小质量小球冲击铝板过程,实验采用FBG光谱右边缘移动滤波解调;对于大质量小球冲击亚克力(PMMA)板和铝板过程,提出了一种基于阻尼衰减原理的新型解调方法。实验结果表明:冲击能较小时,直接利用峰值大小解调,拟合度达到0.988,最高灵敏度为0.0007476 v/g;冲击能较大时,采用包络峰值衰减10%时所对应的时间长度解调,PMMA板和铝板的拟合度分别为0.94、0.89。In order to explore a new real-time demodulation method of impact energy for fiber Bragg grating(FBG)sensor,the impact energy of sheet metal is measured by FBG edge filtering method.For the impact process of low quality sphere acting on aluminium plate,the right edge moving filter demodulation method of FBG spectrum is used in the experiment.For the impact process of high quality sphere acting on acrylic(PMMA)and aluminium plate,a new demodulation method based on damping attenuation principle is proposed.The experiment results show that the peak value can be directly used as the demodulation basis for a weak impact energy signal,and its goodness of fit is 0.988,sensitivity is 0.0007476 v/g.For a stronger impact energy,the linear fitness of PMMA plate and aluminium plate is 0.94 and 0.89 respectively when using the time length corresponding to the peak attenuation of 10%as the demodulation.

关 键 词：光纤布喇格光栅 冲击能 解调 阻尼 

分 类 号：TN247[电子电信—物理电子学]