摘要
基于数字图像相关方法的桥梁挠度仪会因相机温度变化而引起一定的测量误差,为了补偿因相机温度变化而引起的挠度测量误差,先通过实验实测了相机温度变化与测量误差之间的数值关系,并发现相机温度变化与测量误差之间存在一定的线性关系;然后通过直线拟合方法,找出相机温度变化与测量误差之间的具体函数关系,并据此对挠度测量过程进行了实时温度补偿。实验表明,经过温度补偿后的挠度测量,其测量误差大为降低,降幅可达85.3%。
The changes of the camera temperature of the bridge deflection meter by use of digital image correlation method would cause some errors.In order to compensate the deflection measurement errors caused by the changes of the camera temperature,this paper first measured the numerical relationship between the variations of the camera temperature and the errors through experiments,and found that there was a linear relationship between the variations of the camera temperature and the errors.Then the function between the variations of the camera temperature and the errors was found out by line fitting method.According to the function,the real-time compensations were made for the deflection measurement.The experiments show that the deflection measurement errors are greatly reduced by 85.3%after the temperature compensations.
作者
蔡友发
傅星
李飞
Cai Youfa;Fu Xing;Li Fei(State Key Laboratory of Precision Measurement Technology and Instruments,Tianjin University,Tianjin 300072,China;Beijing SMAT Technology Co.,Ltd,Beijing 100044,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2019年第7期88-92,共5页
Journal of Electronic Measurement and Instrumentation
基金
国家重大科学仪器设备开发专项(2014YQ090709)资助
关键词
数字图像相关(DIC)
桥梁挠度
温度补偿
实时
digital image correlation(DIC)
bridge deflection
temperature compensation
real-time
作者简介
蔡友发,分别在1999年和2002年于天津工业大学获得学士学位和硕士学位,现为天津大学精密测试技术及仪器国家重点实验室工程博士研究生,北京思莫特科技有限公司高级工程师,主要研究方向为精密测试技术和测控技术。E-mail:cai517@sina.com;傅星,1998年于天津大学获得博士学位。现为天津大学精密测试技术及仪器国家重点实验室副主任,教授,博士生导师,主要研究方向为微纳米测试及加工。E-mail:xingfu@tju.edu.cn
