摘要
为实现工业生产中光纤传像材料的微纳米尺度形变的检测,建立了图像楔面化模型,提出了一种基于光流的离面位移测量技术。实验装置由一部带有工业相机的光学显微镜和一个放置倒像器的支架构成,通过支架的倾斜可对光纤传像材料加载形变。首先,在显微镜下用工业相机采集变形前后的两幅二维图像。接着,用Brox光流算法得到两幅图像之间的光流运动场。最后,根据图像楔面化模型,由两幅图像之间的光流场得到两幅图像之间的离面位移场并分析了实验结果。实验结果表明,在光学放大50倍的显微镜下多次测量结果的绝对误差均小于0.1μm,相对误差均小于2%。该方法只需要一部工业相机拍摄显微镜下两幅图像即可完成测量,提取离面位移时无需转换到频域和相位解包操作,适合动态原位测量。该方法测量误差较小,目前已被应用于光纤传像材料的微纳米尺度形变与均匀度工业监测。
In order to monitor the micro-scale deformation of optical fiber material during industrial production,image wedge model is built and then a out-of-plane displacement measurement technique based on optical flow field is proposed.The experimental apparatus consists of an optical microscope with an industrial camera and a holder with a fixed image inverter and the deformation can be loaded by tilting the holder.First,2D images before and after deformation are captured through microscope with CCD camera.Subsequently,the optical flow field between two images is obtained by Brox optical flow algorithm.Finally,according to the image wedge model,the out-of-plane displacement field between two images is extracted from the optical flow field and the results of experiment are analysed as well.The experimental results indicate that the absolute errors and the relative errors of the measurement by optical microscope with magnification of 50×are less than 0.1μm and 1.5%,respectively.The displacement measurement can be completed by two consecutive frames which obtained by only one optical microscope with a industrial camera.The proposed method is appropriate for dynamic deformation monitoring and industrial in-situ detection and it neither need conversion of the images to frequency domain,also do not need phase envelope operation during the out-of-plane displacement extraction process.Due to the low errors,it has been applied to the industrial uniformity and micro-nano-scale deformation monitoring of optical fiber image transmission materials.
作者
赵冉
王雅楠
李苗
刘波
孙勇
张洋
贾金升
ZHAO Ran;WANG Yanan;LI Miao;LIU Bo;SUN Yong;ZHANG Yang;JIA Jinsheng(State Key Laboratory of Green Building Materials,China Building Materials Academy,Beijing 100024,China;Beijing Key Laboratory of Solar Energy and Building Energy-saving Glass Materials Processing Technology,Beijing 100024,China;Zhongkexin Engineering Consulting(Beijing)Co.,Ltd.,Beijing 100039,China;CNBM Guangxin Technology Co.,Ltd,Zaozhuang,Shandong 277100,China)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2021年第12期88-97,共10页
Acta Photonica Sinica
基金
国家自然科学基金(Nos.11902317,61975099,52072357)
山东省重大科技创新工程项目(No.2019TSLH0122)。
关键词
离面位移提取
工业检测
光流场
光纤传像材料
动态监测
Out-of-plane displacement extraction
Industrial detection
Optical flow field
Optical fiber material
Dynamic monitoring
