摘要
为判断作用在传感光栅上的轴向应变,提出了一种光纤光栅应变传感解调新方法。该方法基于光纤光栅匹配滤波技术,使解调光栅受压电陶瓷驱动,对传感光栅反射光波进行波长扫描,将应变引起的传感光栅布拉格反射波长的漂移,变为解调光栅透过的负脉冲在时域中的间隔变化。该系统的传感灵敏度实验值89.132×10^(-6)ε/ms与理论值85.470×10^(-6)ε/ms基本吻合。
A novel technique for fiber Bragg grating sensing demodulation is introduced in order to judge axis strain of sensing fiber Bragg grating. The technology is, based on matching wave filter technology, to make demodulation fiber Bragg grating scan reflected wavelength controlled by PZT and convert reflected wavelength-shift of sensing fiber Bragg grating, caused by strain, into variation of time-interval between negative impulses. The sensing sensitivity of this system is 89.132×10^(-6)ε/ms, which basically matches the theoretic value of 85.470×10^(-6)ε/ms.
出处
《哈尔滨理工大学学报》
CAS
2004年第2期118-119,123,共3页
Journal of Harbin University of Science and Technology
