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提出了一种基于单膜片全粘封装的光纤布拉格光栅(FBG)加速度传感模型。首先,理论分析了其传感原理,并优化了最佳加速度灵敏度,深入分析和讨论了该模型的加速度灵敏度的频率响应。然后,基于该模型设计了FBG加速度传感器,实验研究了加速度的幅频响应特性、谐振频率和加速度的线性响应。结果表明:在小于共振频率的低频段具有较好的平坦区,加速度与波长具有较好的线性关系,线性度为99.8%,加速度响应灵敏度为36.6pm/G,实验值与理论值得的相对误差为3.68%;实验研究了传感器的横向抗干扰能力,交叉灵敏度小于1.3%,表明基于该模型的FBG加速度传感器具有较好的响应特性。
A fiber Bragg grating (FBG) acceleration sensing model based on single-film all-adhesive packaging was proposed. Firstly, the principle of sensing is analyzed theoretically, and the best acceleration sensitivity is optimized. The frequency response of acceleration sensitivity of the model is analyzed and discussed. Then, an FBG acceleration sensor is designed based on this model. The amplitude response, the resonance frequency and the acceleration response of the accelerometer are experimentally studied. The results show that there is a good linear relationship between the acceleration and the wavelength in the low frequency range, which is less than the resonant frequency. The linearity is 99.8% and the sensitivity of acceleration response is 36.6pm / G. The relative error between experimental value and theoretical value Is 3.68%. The transverse anti-jamming capability of the sensor is experimentally studied, and the cross-sensitivity is less than 1.3%. It shows that FBG accelerometer based on this model has good response characteristics.