基于FPGA的光纤光栅传感解调系统  

Demodulation system of fiber Bragg grating sensor based on FPGA

作　　者：严鹏飞[1] 高强[1] 邱俊彭 张建祥[1] 张保成[1] 闫宏伟[1] 

机构地区：[1]中北大学机械与动力工程学院机械工程系,山西太原030051

出　　处：《应用光学》2016年第6期942-947,共6页Journal of Applied Optics

基　　金：国家自然科学基金项目(51275487);山西省自然基金(2011021026-1);山西省重点研发计划社会发展项目(201603D321117)

摘　　要：针对目前光纤光栅传感器解调设备存在的问题,研究设计了更低成本、便携化、性能稳定的传感器解调设备。选择系统集成度高与环境适应性强的线阵CCD光谱成像法作为解调设备整体方案,以SOPC作为嵌入式解调内核,构建传感器解调系统,并通过实验证明,高斯拟合和频谱相关算法的解调精度较高,平均偏差在0.005 0nm以内,分别为0.003 0nm和0.004 8nm,有效提高了光纤光栅传感器中心波长的解调分辨力,同时也证明设计的基于FPGA的光纤光栅传感器解调系统实现了高集成度、高分辨率的解调系统要求。In view of the present existing problems of fiber grating sensor demodulation equipment,aportable sensor demodulation equipment with lower cost and stable performance was studied and designed.The linear charge coupled device(CCD)spectral imaging method with high integration and strong adaptability to environment was selected to be the overall plan for demodulation equipment.The sensor demodulation system was established with the SOPC as the embedded demodulation kernel.And the experiments were carried out and results prove that the Gaussian fitting algorithm and spectrum correlation algorithm can get high demodulation accuracies,the average bias is within 0.005 0nm,that is,0.003 0nm and 0.004 8nm,respectively,the center wavelength demodulation of fiber bragging sensor resolution is effectively improved;moreover,the fiber grating sensor demodulation system based on field programmable gate array(FPGA)can satisfy the requirements of high integration and high resolution for demodulation system.

关 键 词：FPGA SOPC 光纤光栅 高斯拟合 频谱相关 

分 类 号：TN253[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]