数字剪切散斑干涉玻璃幕墙缺陷无损检测  

Digital shearing speckle pattern interference non-destructive testing of glass curtain wall defects

作　　者：王单单 高岩 李伟仙[1] 苏展 吴思进[1] WANG Dandan;GAO Yan;LI Weixian;SU Zhan;WU Sijin(School of Instrumentation Science and Opto-electronics Engineering,Beijing Information Science and Technology University,Beijing 100192,China;Henan Province Automation Engineering Technology Research Center,Zhengzhou 450008,China)

机构地区：[1]北京信息科技大学仪器科学与光电工程学院,北京100192 [2]河南省自动化工程技术研究中心,河南郑州450008

出　　处：《中国测试》2022年第4期29-34,共6页China Measurement & Test

基　　金：国家自然科学基金面上项目(52075044,52075045);河南省科学院助推科技成果转化项目(20207004);河南省科学院基本科研费立项项目(200602003)。

摘　　要：玻璃幕墙是现代建筑的重要组成部分,检测其内部缺陷对建筑安全评估具有重要的意义。该文提出一种数字剪切散斑干涉玻璃幕墙缺陷无损检测方法,探索一种适用于玻璃幕墙检测的实验方法,通过对玻璃进行热加载,在温降阶段一定时间间隔前后利用四步相移法分别获取散斑相位图,接着提取温降前后相减的相位差图的相位差并计算全场形变的空间位移梯度,从而检测出玻璃幕墙的缺陷位置。实验结果表明,剪切散斑干涉技术能够检测出玻璃幕墙缺陷处形变的空间位移梯度及其缺陷位置,因此使用剪切散斑干涉技术对玻璃幕墙缺陷进行无损检测是一种有效的方法,对评估幕墙玻璃安全隐患具有重要意义。The glass curtain wall is an important part of modern buildings,and the detection of its internal defects is of great significance for building safety assessment.This paper proposes a digital shearing speckle pattern interference method for the nondestructive detection of defects of glass curtain wall,and explores an experimental method suitable for glass curtain wall inspection.By thermally loading the glass,the four-step phase shifting technique is used before and after a certain time interval during the temperature-dropping phase to obtain the speckle phase map separately,and the phase difference is extracted by subtracting the speckle phase map before and after the temperature dropping.In the final stage,the spatial displacement gradient of the whole field deformation is calculated,thereby detecting the defect position of the glass curtain wall.The experimental results show that the shearing speckle pattern interferometry can detect both the spatial displacement gradient of the deformation and the position of the defects inside the glass curtain wall.Therefore,the shear speckle interference technology is an effective method for the nondestructive detection of the glass curtain wall defects,which has a great importance in evaluating the potential safety issues of glass curtain wall.

关 键 词：玻璃幕墙 无损检测 缺陷检测 剪切散斑干涉 

分 类 号：O439[机械工程—光学工程] TB9[理学—光学]