【摘要】 提出一种新型的光纤传感器——反射式动栅光纤传感器。这种传感器是采用光纤作为传光元件，而敏感元件是一对等节距光栅，其中一块为定栅，一块为动栅，当两光栅位置发生变化时，其光通量随之变化，再经光电转换系统转换信号后以电信号输出的传感系统。该传感器结构简单，使用方便，可用于测量位移、应变及其它物理量，尤其是在高温测量、连续变化量测量及实时监测等方面，更显示其优越性。文中给出了这种传感器的理论分析，并以测位移为例，给出了实测结果。实验结果表明，理论分析与实验结果相一致，并具有一定的测试灵敏度更多还原

【Abstract】 Presents a new kind of optical fibre sensor moved grating fibre sensor, which uses optical fibres as light transmission components and a couple of equidistant gratings one is stable and the other is movable as sensitive components. When the two gratings′ location is changing, the optical flux is changing too and the electric signals transferred by the photoelectric conversion system are exported. The sensor′s structure is simple and it is convenient to be used. It can be used for the measurement of displacement, strain and other physical quantities, especially for the high temperature measurement, continuously varied quantity measurement and real time detection. Theoretical analysis of the sensor is presented and the displacement is recorded with the sensor as an example. Results show that the analysis is in good agreement with the experiment and the sensor has certain test sensitivity.更多还原