基于数字图像相关的柔性屏弯折应变测量分析(特邀)  

Analysis of Flexible Screen Bending Strain Measurement Based on Digital Image Correlation(Invited)

作　　者：李骏睿[1] 王欢庆 潘万林 余卿[3] 王永红[1] Li Junrui;Wang Huanqing;Pan Wanlin;Yu Qing;Wang Yonghong(School of Instrument Science and Opto-Electronics Engineering,Hefei University of Technology,Hefei 230009,Anhui,China;PLA Army Academy of Artillery and Air Defense,Hefei 230031,Anhui,China;School of Electromechanical and Automation,Huaqiao University,Xiamen 361021,Fujian,China)

机构地区：[1]合肥工业大学仪器科学与光电工程学院,安徽合肥230009 [2]中国人民解放军陆军炮兵防空兵学院,安徽合肥230031 [3]华侨大学机电及自动化学院,福建厦门361021

出　　处：《激光与光电子学进展》2024年第3期49-54,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金项目(52205562,52375536);江西省重点研发计划项目(20223BBE51010)。

摘　　要：柔性屏在弯折的过程中,容易出现器件损伤、胶层剥离等现象,因此明确屏幕在弯折过程中屏幕保护层的应变分布十分重要。提出一种基于数字图像相关(DIC)的柔性屏弯折应变测量方法,通过采集屏幕表面保护层的喷涂散斑图像来实现屏幕弯折过程保护层应变的全场测量,然后根据匹配点坐标计算弯折平面方程,得出弯折角度与应变之间的关系。实验结果表明,所提方法能测量出不同弯折角度下屏幕保护层全场应变信息,进而得知屏幕保护层的应力分布情况。即所提方法可量化屏体弯折时的应变量并根据应变测量结果推断出弯折过程中应力分布情况。Bending of flexible screens often leads to issues such as device damage and adhesive layer delamination.Therefore,it is essential to understand the strain distribution in the protective layer during the bending process.This study presents a method for measuring the strain in a flexible screen during bending,utilizing digital image correlation.The method enables synchronized full-field strain measurements in the protective layer while simultaneously capturing speckle pattern images applied to the screen surface.Subsequently,we calculate the bending plane equation based on matching point coordinates,revealing the relationship between bending angle and strain.Experimental results validate the effectiveness of this approach in providing comprehensive strain data for the protective layer at various bending angles.Consequently,this method quantifies the strain occurring on the screen and provides insights into stress distribution during the bending process.

关 键 词：柔性屏弯折 应变分布 数字图像相关 全场测量 

分 类 号：TH741[机械工程—光学工程]