复合物空心悬臂梁的应变实验对比分析

Strain Experiment Contrast Analysis of Composite Hollow Cantilever Beam

应用电阻应变片和光纤光栅对复合空心梁的应变进行测量,同一截面的上表面对应位置的应变相同,截面下表面应变不同。传感器的灵敏度较好,线性相关性达到0.9989以上,光纤光栅和应变片传感器的应变与荷载的灵敏度23με/kg以上,光纤光栅波长与应变的灵敏度达31pm/kg,应变片的误差为1με,光纤光栅误差为0.82με。

Using resistance strain gauge and fiber bragg grating to make strain measurements of composite hollow beam, the upper surface of the same cross section corresponds to the same location of the strain, and the lower surface corresponds to different strain. The sensitivity of the sensor is good, the linear correlation is more than 0. 9989, fiber bragg grating strain and strain gauge sensor and the sensitivity of load is 23 mu epsilon/kg or more, the sensitivity of FBG wavelength and the strain is 31 PM/kg, the error of the strain gauge is 1 mu epsilon, fiber bragg grating error is 0.82 mu epsilon.