重庆大学学报2025，Vol.48Issue(8)：111-122,12.DOI:10.11835/j.issn.1000-582X.2025.08.010
数字图像相关法的量值溯源方法及计量校准装置
Value traceability methods and metrological calibration devices for digital image correlation techniques
摘要
Abstract
The digital image correlation(DIC)method currently suffers from inadequate systematic calibration methods and an underdeveloped metrological traceability system.To address these challenges,this study proposes a novel calibration methodology based on laser interferometry,integrated with a custom-designed optical system for local deformation measurements.Finite element simulations are employed to analyze the stress stiffening effect in strain plates under tensile loading.A coupled thermo-mechanical model is developed via theoretical analysis and experimental validation to quantitatively assess the influence of convective heat transfer on surface strain measurement accuracy.Furthermore,an Abbe error compensation mechanism is implemented to effectively mitigate nonlinear measurement errors induced by microscale bending during loading.A comprehensive uncertainty analysis is conducted to evaluate both standard uncertainty components and the overall measurement uncertainty.Experimental results demonstrate that the proposed calibration device reduces the uncertainty in standard strain field measurements to the range of 1.9%to 0.83%,offering a critical advancement toward establishing a traceable calibration framework for DIC-based strain measurement systems.关键词
数字图像相关法/应变/量值溯源/有限元法/阿贝误差/对流换热Key words
digital image correlation(DIC)/strain measurement/metrological traceability/finite element analysis/Abbe error/convective heat transfer分类
数理科学引用本文复制引用
吴禹,袁静,王丽芳,薛瑞,唐依文..数字图像相关法的量值溯源方法及计量校准装置[J].重庆大学学报,2025,48(8):111-122,12.基金项目
重庆市科研机构绩效激励引导专项(cstc2020jxj1X0004).Supported by Chongqing Research Institution Performance Incentive Guidance Special Project(cstc2020jxj1X0004). （cstc2020jxj1X0004）
