高温条件下物体面内位移的非接触式检测  

Noncontact measurement of in-plane displacement under high temperature conditions

作　　者：苏兰海[1,2] 马祥华[1,2] 任宝民 毕佳[1] 刘丹丹[1,2] 

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]北京科技大学新型飞行器技术研究中心,北京100083

出　　处：《北京科技大学学报》2013年第12期1659-1667,共9页Journal of University of Science and Technology Beijing

基　　金：中央高校基本科研业务费专项资金资助项目(FRF-AS-09-002A);国家重大科学仪器设备开发专项资金资助项目(2011YQ14014507)

摘　　要：应用数字图像相关方法对高温条件下物体面内位移场进行快速、高精度测量.采用532 nm面阵激光作为照明光源配合532 nm窄带滤波与可调式衰减片组成的光学处理系统,很好地解决了高温情况下成像难题.介绍了人工散斑的制作方法,采用耐1000℃高温的高温墨作为散斑的制作原料,制作了可在1000℃高温情况下清晰的利于图像相关计算的散斑图.搭建了高温条件下物体面内位移的检测系统,分别做了常温下亮度不同的千分尺移动位移检测实验和喷灯对钢板持续局部加热到1000℃热变形场的测量实验.实验结果证明本系统具有抗干扰能力强、计算精度高以及便于实现的优点,可用于常温及高温条件下物体位移或变形场的测量.The digital speckle correlation method was used to achieve fast and high-precision measurement of in-plane displacement under high temperature conditions. A plane array 532 nm laser used as the light source and an optical processing system which is composed of a 532 nm narrow band filter and an adjustable attenuator were a good solution to the imaging problem in this high-temperature case. An artificial speckle making method was described. In this method, high temperature ink resisting about 1000 ℃ was used as the speckle material, the artificial speckle under this situation was clear and good to image correlation calculation. An in-plane displacement detection system was built under high temperature conditions, micrometer moving displacement detection tests were carried out under different brightness values at room temperature, and thermal deformation field measurement tests of steel locally heated continuously to 1000 ℃ by blowtorch was also made. Test results show that the system can be used for the measurement of object displacement or deformation field at room temperature and high temperature conditions with the advantages of strong anti-jamming capability, high accuracy, and easy realizing.

关 键 词：非接触测量 位移测量 激光应用 图像相关 

分 类 号：TB22[天文地球—大地测量学与测量工程]