摘要
为了提高光纤布喇格光栅(FBG)水听器的声压灵敏度,提出了一种基于薄壳弹簧的增敏结构.通过增大声压作用面积,并将径向压力转化为FBG的轴向应变,使FBG对声压信号的敏感度增加了2 900倍.利用有限元软件ANSYS对结构进行优化设计后,制作了基于该增敏结构的水听器原型样品并在水箱中进行了实验.实验结果表明,利用该增敏结构将FBG的声压灵敏度提高了约2 264.6倍,基本实现了设计目的.
For the purpose of improving the acoustic pressure sensitivity of the Fiber Bragg Grating(FBG) hydrophone units,a sensitization configuration based on shell spring is presented.And with it,the acoustic pressure activating area has been increased,and the radial pressure on the configuration has been converted to axial strain in the FBG,and as a result,the sensitivity of the FBG to acoustic pressure is increased as much as 2 900 times.By finite element software ANSYS,the configuration is optimized,subsequently,a prototype of FBG hydrophone encapsulated with the configuration has been fabricated,and experiments have been carried out in a water tank.The results indicated that the acoustic pressure sensitivity of FBG has been enhanced as much as about 2264.6 times,and the objective has achieved to a great extent.
出处
《传感技术学报》
CAS
CSCD
北大核心
2007年第11期2417-2420,共4页
Chinese Journal of Sensors and Actuators
作者简介
谭波(1979-),男,汉族,湖南双峰,海军工程大学兵器工程系,助教(博士研究生),主要研究方向为减振降噪、光纤光栅传感,whtbwjsw@163.com
