| 基于数字图像相关法的应变场测量系统校准技术研究综述 |
| Review of calibration techniques for strain field measurement systems based on Digital Image Correlation method |
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| 中文摘要: |
| 介绍了基于数字图像相关法（Digital Image Correlation， DIC）的应变场测量系统的原理、应用场合及发展现状，阐述了对该系统进行校准的必要性。介绍了四点弯曲校准法、单轴拉伸校准法、垂直加载校准法、散斑变换校准法等具有代表性的DIC应变场测量系统校准方法的原理，从校准维度、校准范围、装置成本、装置复杂性、计量溯源性、测量不确定度等方面对比分析了各校准方法的优势与不足，指出可通过改进传感器性能、优化测量光路、提升散斑质量等手段提升校准准确性。展望了基于DIC的应变场测量系统校准技术的发展方向，指出未来应针对大变形场的可靠产生与复现、散斑图样的三维立体化、多种校准数据的有机融合等开展研究，以进一步拓展应变场校准范围并降低测量不确定度。 |
| 英文摘要: |
| This paper introduces the principle, application and development status of the strain field measurement system based on Digital Image Correlation (DIC), expounds the necessity of calibrating the system, and introduces the principles of representative calibration methods for DIC strain field measurement systems, such as four point bending calibration method, uniaxial tension calibration method, vertical loading calibration method and speckle transformation calibration method. The calibration dimension, calibration range, device cost, device complexity, metrological traceability and measurement uncertainty of various calibration methods are discussed, and the advantages and disadvantages of each calibration technology are compared and analyzed. It is pointed out that the accuracy of existing calibration methods can be improved by improving sensor performance, optimizing the measurement optical path, and enhancing the speckle quality. The development direction of calibration technology for strain field measurement systems based on DIC is discussed, and it is pointed out that future research should focus on the reliable generation and reproduction of large deformation fields, three?dimensional visualization of speckle patterns, and organic fusion of multiple calibration data to further broaden the scope of application of strain field calibration and effectively reduce the uncertainty in the measurement process. |
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| 中文关键词: 数字图像相关法 校准 应变场测量 不确定度 |
| 英文关键词:Digital Image Correlation calibration strain field measurement uncertainty |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2024.03.06 |
| 引用本文：程帅, 张大治, 段小艳, 姜延欢.基于数字图像相关法的应变场测量系统校准技术研究综述[J].计测技术,2024,44(3):. |
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