平面偏振光场光弹性实时相移法的误差分析  

Error analysis to photoelasticity real-time phase-shifting method in plane polariscope

作　　者：毛灵涛[1] 安里千[1] 袁则循[2] 周婷[3] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,北京10083 [2]北京城市学院培训中心,北京100083 [3]中国矿业大学工程力学测试技术研究所,北京100083

出　　处：《光学技术》2008年第4期626-629,632,共5页Optical Technique

摘　　要：研究了在获取图像的过程中转角变化、偏振片方位角误差及试件所受的载荷变化对平面偏振光场光弹性实时相移法的影响。通过理论分析与数值模拟,讨论了在不同条件下等倾角相位误差。等倾角相位误差随着每场转角变化的增加而增大;偏振镜方位角误差使等倾角相位产生平移;试件所受的载荷变化会引起所采集的光弹性图像误差,对等倾角的计算结果会产生较大的影响。研究结果对合理设计光弹性实验装置、正确评价和执行实验技术具有积极的指导作用。The influences of rotation angular alteration,alignment error of polaroid and load change during collecting photo on photoelasticity real-time phase-shifting method in plane polariscope are analyzed.By theory analysis and numerical simulation,isoelinic phase error is discussed under the different conditions.With the rotation angular alteration per fidd increasing, isoclinic phase error gets bigger.The alignment error makes parallel movement error on isoclinic phase.Since load change makes the photoelasticity images with error,the isoclinic phase calculated with these images yields significant error.Those conclusions are instructive to photoelasticity experiment system development,method evaluation and experiment operation.

关 键 词：光弹性 相移法 误差分析 

分 类 号：O436.3[机械工程—光学工程] TN911.73[理学—光学]