【摘要】 为了实现光纤布拉格光栅(FBG)加速度信号的准确测量,提出了一种新颖的双悬梁FBG加速度传感器。设计了传感器的结构及封装方法,理论分析了传感器的工作原理。实验研究了传感器的线性响应、温度响应、共振频率和方向抗干扰特性,结果表明,传感器的加速度响应灵敏度为7.81pm/m/s2,相对误差为2.62%,加速度与波长具有较好的线性关系,线性度为99.8%;在67.5～27.5℃内进行了温度补偿实验,能有效消除温度的影响;传感器具有较好的平坦区和较强的抗干扰能力。更多还原

【Abstract】 In order to realize the precise measurement of acceleration by fiber Bragg grating,a novel double-cantilever beam fiber Bragg grating accelerometer is proposed.Firstly,the configuration and coating of the accelerometer were designed.Secondly,the principle of the fiber Bragg grating accelerometer was analyzed theoretically.The temperature response of FBGs and the acceleration response versus wavelength were analyzed.And the analytical formula of acceleration sensitivity was also deduced.Thirdly,the linear response,temperature response,resonance frequency and anti-jamming of the FBG accelerometer were researched experimentally.Experimental results indicate that the sensitivity is 7.81 pm/m/s2,the relative error is 2.62%.The linearity between acceleration and wavelength is 99.8%.The temperature compensation from 67.5 ℃to 27.5 ℃ is realized triumphantly.The sensor has good flat response range and faculty of anti-jamming.更多还原