Design and Modeling of a High Sensitivity Fiber Bragg Grating-Based Accelerometer
Design and Modeling of a High Sensitivity Fiber Bragg Grating-Based Accelerometer
复制标题
基于高灵敏度光纤布拉格光栅的加速度计的设计和建模
DOI：
10.1109/jsen.2019.2904218
复制
发表时间：
2019-07-15
影响因子：
4.3
通讯作者：
Grattan, Kenneth T., V
中科院分区：
文献类型：
--
作者：
Liu, Qinpeng;He, Xue;Grattan, Kenneth T., V
使用一个详细的理论模型，允许优化的高灵敏度加速度计的设计，基于光纤布拉格光栅（FBG）和基于这种设计的加速度计已被实验证明。建立了基于双点封装的通用模型，分析了器件的最佳灵敏度和最佳频率分布特性，提出了以灵敏度和谐振频率的乘积作为优化“优值”的方法。实验结果表明，所研制的FBG加速度计具有宽而平坦的频带，其平量程灵敏度接近152.0pm/G，谐振频率为441.0Hz，横轴灵敏度小于主轴灵敏度的3.6%。因此，具有这种性能的加速度计在低频油气地震勘探中具有重要的应用前景。
Use of a detailed theoretical model has allowed the optimization of the design of a high sensitivity accelerometer, based on a fiber Bragg grating (FBG) and an accelerometer based on this design has been demonstrated experimentally. With a universal model based on double-point encapsulation established, the performance of the device in terms of its optimal sensitivity and frequency distribution has been analyzed, with an optimization 'figure of merit' using the product of the sensitivity and the resonant frequency being presented. The experimental results obtained indicate that the FBG-based accelerometer thus developed shows a broad, flat frequency band, a corresponding flat range sensitivity of similar to 152.0pm/G, a resonant frequency of 441.0Hz, and a cross-axis sensitivity of less than 3.6% of the main-axis sensitivity. An accelerometer of this type and with this performance thus has the potential for the important field of low frequency oil-gas seismic exploration.