FBG加速度传感系统随机误差模型及实验研究  

Random error model and experimental investigation of FBG acceleration sensing system

作　　者：刘钦朋[1] 惠君尧 乔学光[1] 贾振安[1] 傅海威[1] 禹大宽[1] 高宏[1] 

机构地区：[1]西安石油大学理学院,光电油气测井与检测教育部重点实验室,陕西西安710065

出　　处：《光电子．激光》2016年第5期468-472,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61327012,61275088,61077060);教育部科技创新工程重大项目(Z08119);西安石油大学博士启动基金(2015BS09-0314-134010253);陕西省大学生创新训练“井间地震光纤检波器研究”(1357);陕西省自然科学基金(2016JM6055)资助项目

摘　　要：为了实现光纤布拉格光栅(FBG)加速度传感系统的精确测量,提出并建立一种FBG加速度传感系统随机误差理论模型,并实验研究了系统的误差源。首先,分析FBG加速度传感系统的构成,包括传感器的封装设计、传感光源以FBG解调技术;进而研究系统的噪声源及其特性,建立FBG加速度传感系统的随机误差理论模型,并分析FBG加速度传感系统的主要噪声系数;基于随机误差理论模型,实验研究FBG加速度传感系统随机误差的方差识别,通过时域零输入的输出数据量化研究加速度传感系统的量化噪声系数、零偏不稳定系数、速度随机游走系数、加速度斜坡系数和加速度随机游走系数,对FBG加速度传感系统的综合性能进行评价。本文的理论模型和识别方法可为FBG加速度传感技术的改进和提高提供了定量客观的参考。In order to realize acceleration measurement by the fiber Bragg grating （FBG） sensing system, a random error model based on the FBG acceleration sensing system is proposed and established, and the error source of the system is experimentally researched. Firstly, the composition of the FBG sensing system is analyzed,which includes the fabrication design of the FBG sensor,sensing source and demodulation technology of FBG. The noise source of the system and the characteristics are researched, and a random error model of the system is established. Secondly, based on the model, the variance recognition of the FBG sensing random error is experimentally researched. The quantization noise coefficient, the bias instability coefficient, the velocity random walk coefficient, the acceleration ramp coefficient and the acceleration random walk coefficient are investigated by the output data of zero input, and the FBG sensing system is evaluated by different coefficients. The theoretical model and variance recognition method pro- vide the objective and quantitative reference for further improvement of FBG acceleration sensing system.

关 键 词：光纤布拉格光栅(FBG) 加速度传感 随机误差模型 实验识别 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置] P631.4[自动化与计算机技术—控制科学与工程]