【摘要】 利用悬臂梁调谐和两个并联二次反射匹配解调光栅的方法实现了光纤布喇格光栅 (FBG)传感器的高精度大范围应变传感测量 通过并联方式 ,选择合适的匹配光栅波长 ,增大了可检测的应变范围 ,同时解决了双值问题 应变传感信号经两路解调光栅解调 ,并由数据采集卡采集后 ,由计算机进行两路并联信号的综合处理后获取更准确的结果 ,使得系统性能得到提升和优化 试验结果与理论分析一致更多还原

【Abstract】 A technique for the interrogation of fiber Bragg grating (FBG) sensors based on the use of two paralleled second wavelength-matched FBG receiver to track wavelength shift from the FBG sensor was analyzed and experimented. Selecting two FBGs with appropriate wavelength and bandwidth as second wavelength-matched FBG receivers, the real-time analog electric signal from the photo detectors was collected by the Data Acquisition Card, and then was processed by the computer. The method can enlarge the dynamic range and high resolution.The advantages and the disadvanges of the method were analyzed.The sensor and interrogation system has been optimized The experiment results are in excellent agreement with the theoretical analysis.更多还原