CAJ | 학술논문

介绍了啁啾光纤光栅的物理结构和传感原理,引入参考光栅,采用调制光强的方法实现了啁啾光纤光栅的传感信号解调,测试了它的应变和温度传感性能,测试数据显示其应变和温度传感曲线的线性度分别为0.9991和0.9989,表明啁啾光纤光栅具有较好的线性传感特性。为了解决长期检测时测量结果受光源衰减影响的问题,提出了一种新型的基于光强比值的解调处理算法并进行了实验验证,结果表明,该方法不仅极大地提高了啁啾光纤光栅用于长期检测的测量精度,还具有温度自补偿功能,提高了抗干扰能力,满足长期测试需求。
개소료조추광섬광책적물리결구화전감원리,인입삼고광책,채용조제광강적방법실현료조추광섬광책적전감신호해조,측시료타적응변화온도전감성능,측시수거현시기응변화온도전감곡선적선성도분별위0.9991화0.9989,표명조추광섬광책구유교호적선성전감특성。위료해결장기검측시측량결과수광원쇠감영향적문제,제출료일충신형적기우광강비치적해조처리산법병진행료실험험증,결과표명,해방법불부겁대지제고료조추광섬광책용우장기검측적측량정도,환구유온도자보상공능,제고료항간우능력,만족장기측시수구。
Describes the physical structure and the sensing principle of chirped fiber Bragg grating(CFBG),in-troducing a reference grating,the author realizes sensing signal demodulation of CFBG by using light intensity modulation.The strain and temperature sensing properties of CFBG were tested and the test data shows that the linear coefficient of the fitting curves of strain and temperature sensing properties were 0.9991 and 0.9989, which shows that CFBG has eminent strain and temperature sensing properties.In order to solve the problem that measurement accuracy of long-term monitoring was affected by light attenuation,the author proposes a new demodulation algorithm based on the intensity ratio and does some experimental validations for it.Test re-sults showed that the method can greatly improve the long-term detection accuracy of CFBG and also can realize the automatic temperature compensation.