一种新型结构非本征光纤F-P传感器全应变测量性能研究

光纤传感器作为一种新的测量信息传输方式，在航空发动机部件材料高温测量领域具有重要的应用价值。基于多光束干涉原理，制作一种新型结构的非本征光纤 Fabry-Perot（F-P）传感器，探索其在航空发动机部件材料室温/高温环境静力拉伸试验过程中的变形测量性能。采用平板和圆棒两种形状的试样，在不同表面粗糙度和两种加载速率下，分别对比高级视频引伸计（AVE）进行室温、高温环境下静力拉伸试验。结果表明：新型结构的非本征光纤 F-P 传感器具有测量范围大，测量精度高，测量结果不受外界因素影响等优势，可实现航空发动机部件材料的超量程全应变测量；此外，在测量精度和设备体积方面明显优于 AVE。

Research on full strain measurement technology based onoptical fiber F-P sensor

In this paper, based on the principle of multi-beam interference, a new type of extrinsic fiber Fabry-Perot (F-P) sensor is fabricated to explore its deformation measurement performance during static tensile testing of aero-engine component materials at room temperature/high temperature. Two types of specimens, flat plate and round bar, were used to perform static tensile tests at room temperature and high temperature under different surface roughness and two loading rates, respectively, compared with Advanced Video Extensometer (AVE). The test results show that the extrinsic optical fiber F-P sensor with a new structure has the advantages of large measurement range, high measurement accuracy, and the measurement results are not affected by external factors, and can achieve over-range full-strain measurement of aero-engine component materials. In addition, it is significantly better than AVE in terms of measurement accuracy and equipment volume. This paper verifies the accuracy and practicability of the extrinsic optical fiber FP sensor with the new structure in the room temperature/high temperature environment static tensile test process, and lays the foundation for its application in the high temperature creep test of micro specimens of aeroengine component materials.