双膜片结构光纤光栅地震检波器低频特性的研究

英文篇名：Study on low-frequency characteristic of double-diaphragm fiber Bragg grating geophone
中文刊名：光电子.激光
英文刊名：Journal of Optoelectronics.Laser
作者：李学成 ; 刘肃 ; 张文涛 ; 张发祥 ; 李芳 ; 刘育梁
英文作者：LI Xue-cheng1 ; 2 ; LIU Su1 ; ZHANG Wen-tao2 ; ZHANG Fa-xiang2 ; LI Fang2 ; LIU Yu-liang2(1.School of physical Science and Technology ; Lanzhou University ; Lanzhou 730000 ; China ; 2 ; Optoelectronic System Laboratory ; Institute of Semiconductors ; Chinese Academy of Science ; Beijing 100083 ; China)
中文关键词：光纤光栅(FBG) ; 地震检波器 ; 幅频特性
英文关键词：fiber Bragg grating(FBG) ; geophone ; amplitude-frequency characteristic
出版日期：2010-04-15
机构：兰州大学物理科学与技术学院;中国科学院半导体研究所光电系统实验室;
年：2010
期：04
出版单位：光电子.激光

摘要

提出了一种双膜片式的光纤光栅(FBG)地震检波器,此结构有效限制了检波器横向响应。对该检波器的纵向加速度灵敏度和幅频特性进行了理论分析,并指出了影响这种检波器纵向加速度灵敏度的因素。实验结果表明,该种检波器在5～200Hz频率范围内频响平坦,纵向加速度灵敏度为24.3pm/g,谐振峰在900Hz附近,与理论计算较好的吻合。
A novel fiber Bragg grating(FBG) geophone based on double-diaphragm is presented in this paper.The double-diaphragm structure effectively limits transverse vibration of the FBG geophone.The important parameters such as longitudinal acceleration sensitivity and amplitude-frequency response function of the FBG geophone are analyzed theoretically.In addition,we pointed out the factors that affect the longitudinal acceleration sensitivity of the FBG geophone.The experimental results show that the frequency response is flat,and the longitudinal acceleration sensitivity of the FBG geophone keeps 24.3 pm/g at 5 Hz to 200 Hz,and the natural frequency is 900 Hz,which agree well with the theoretical analysis.

引文

[1]MA Chao,QIAO Xue-guang,JIA Zhe-nan,etal.Research on fi-ber Bragg grating geophone[J].Study on Optical Communica-tions(光通信研究),2007,(5):53-55.(in Chinese)
    [2]ZHOU Hong,QIAO Xue-guang,WANG Hong-liang,et al.Study of a high-temperature and high-pressure FBG sensor with Al2O3thin-wall tube substrate[J].Optoelectronics Letters,2008,4(4):260-263.
    [3]ZHANG Wen-tao,LIU Yu-liang,LI Fang.Fiber Bragg grating pressure sensor based on the deformation of flat diaphragm[J].Journal of Optoelectronics.Laser(光电子.激光),2008,19(7):899-901.(in Chinese)
    [4]LI Ming,WU Hai-feng,QIAOXue-guang,et al.Anovel high sen-sitivityfiber Bragg grating pressuresensor[J].Journal of Opto-electronics.Laser(光电子.激光),2009,20(10):1307-1309.(in Chinese)
    [5]TAO Guo,ZHANG Xiang-lin,LIU Xin-ru,et al.A newtype of fi-ber Bragg grating based seismic geophone[J].Applied Geo-physics,2009,6(1):84-92.
    [6]Ti moshenko Stephen.Theory of plates and shells[M].New York:McGral-Hill Book Company,1959.51-75.
    [7]ZHANG Wen-tao,LIU Li-hui,LI Fang,et al.Fiber Bragg grating pressure sensor with enhanced sensitivity[J].Chinese Optics Letters,2007.5(9):507-508.
    [8]Morse P M,Ingard K U.Theoretical Acoustics[M].New York:McGral-Hill Book Company,1968.37-60.
    [9]XIAO Hao,LI Fang,WANG Yong-jie,et al.High-resolution fiber laser sensor system[J].Chinese Journal of Lasers(中国激光),2008,35(1):87-91.(in Chinese)