一种新型结构非本征F-P传感器全应变测量性能研究

Research on Full Strain Measurement Performance of Non-intrinsic Optical Fiber F-P Sensor

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。

As a new measurement information transmission method,optical fiber sensors have important potential applications in the field of high temperature measurement of aero-engine component materials.In this paper,based on the principle of multi-beam interference,a new structure of non-intrinsic optical fiber Fabry-Perot(F-P)sen⁃sor is made,and its deformation measurement performance in the process of static tensile test of aero-engine com⁃ponent materials at room temperature/high temperature is explored.Two types of specimens,flat plate and round bar,are used to perform static tensile tests at room temperature and high temperature under different surface rough⁃ness and two loading rates.The test results show that the non-intrinsic optical fiber F-P sensor with a new struc⁃ture 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 ma⁃terials.In addition,it is significantly better than AVE in terms of measurement accuracy and equipment volume.