高稳定性结构的高精度数字图像相关测量技术研究

IF 3.1 Q1 Mathematics
Fenglong Yang, Bing Pan
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引用次数: 0

摘要

本研究提出了一种新型数字图像处理系统,该系统结合了基于衍射极限分辨率(DLRF)的测量技术和窗口形心跟踪算法。为了评估该系统的准确性,本文比较并分析了传统数字图像技术和基于 DLRF 的变形位移测量方法的有效性。此外,研究还包括环境噪声和均匀高温条件下的热稳定性测试,以评估系统在复杂环境中的稳定性能。实验结果表明,本研究提出的基于 DLRF 的数字图像相关方法在降低平均偏差(从最大值 5.17 × 10-3 降至 1.73 × 10-3)和均方根误差(从最大值 5.14 × 10-3 降至 0.75 × 10-3)方面表现良好。值得注意的是,DLRF 方法在使用单精度格式时比使用双精度格式时处理速度更快,最多可加快 1.05 倍。此外,多重位移平均处理方法可以有效过滤测试中的噪声,大部分区域的噪声影响仅在 0 至 2 μm 范围内。在对测试点 10-34 和 57-80 的分析中,位移误差控制在 5 μm 以内,表明改进后的结构分析模型可用于在轨微米尺度热变形分析。该研究证明了本文提出的数字图像系统在变形位移测量中的高精度和稳定性,为相关领域的精确测量提供了充分的技术支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Research on high-precision digital image correlation measurement techniques for highly stable structures
This study proposes a novel digital image processing system that combines a diffraction-limited resolution (DLRF)-based measurement technique with a windowed form-center tracking algorithm. To evaluate the accuracy of this system, this paper compares and analyzes the effectiveness of conventional digital image techniques and DLRF-based methods for deformation displacement measurements. In addition, the study includes thermal stability tests under ambient noise and uniform high temperature conditions to evaluate the stability performance of the system in a complex environment. The experimental results show that the DLRF-based digital image correlation method proposed in this study performs well in reducing the mean deviation (from a maximum of 5.17 × 10-3 to 1.73 × 10-3) and root-mean-square error (from a maximum of 5.14 × 10-3 to 0.75 × 10-3). It is worth noting that the DLRF method is faster in processing when using the single-precision format than the double-precision format, with a speedup of up to 1.05 times. In addition, the multiple displacement averaging processing method can effectively filter the noise in the test, and the noise effect is only in the range of 0 to 2 μm in most areas. In the analysis of test points 10-34 and 57-80, the displacement error is controlled within 5 μm, indicating that the modified structural analysis model can be used for on-orbit micrometer-scale thermal deformation analysis. The study proves the high accuracy and stability of the digital image system proposed in this paper in the measurement of deformation displacement, which provides adequate technical support for accurate measurement in related fields.
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来源期刊
Applied Mathematics and Nonlinear Sciences
Applied Mathematics and Nonlinear Sciences Engineering-Engineering (miscellaneous)
CiteScore
2.90
自引率
25.80%
发文量
203
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