| 基于频域数字散斑相关方法的面内微位移测量 |
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| 引用本文： | 杨宇航,陈宇,李鹤,王文生.基于频域数字散斑相关方法的面内微位移测量[J].红外与激光工程,2014,43(4):1301-1305. |
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| 作者姓名： | 杨宇航 陈宇 李鹤 王文生 |
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| 作者单位： | 1.长春理工大学现代光学测试技术研究室,吉林长春130022 |
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| 基金项目： | 总装备部预研基金(5131XXXX105) |
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| 摘 要： | 使用传统数字散斑相关方法对物体面内微小位移进行测量时，由于受到噪声影响和算法本身的局限，会出现测量精度低、数据处理速度慢等问题。针对以上缺点，应用频域数字散斑相关方法，通过散斑记录和MATLAB软件编程，实现了物体面内微小位移的测量。这种方法不但弥补了传统数字散斑相关方法的不足之处，而且简化了一般光学测量过程中的反复调校过程。理论分析及实验结果表明，应用频域数字散斑相关方法测微位移的系统结构简单、处理速度快、精度高，能够达到微米级，相对误差小于1%。
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| 关 键 词： | 数字散斑相关 频域 面内微位移 MATLAB编程 Vander-Lugt相关器 |
| 收稿时间： | 2013-08-19 |
In-plane micro-displacement measurement based on digital speckle correlation method in frequency domain |
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| Affiliation: | 1.Laboratory of Contemporary Optical Measure Technology,Changchun University of Science and Technology,Changchun 130022,China |
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| Abstract: | When using traditional digital speckle correlation method to measure in-place micro-displacement, the noise and algorithm defects will cause low accuracy or slow data processing. In order to solve these problems, digital speckle correlation method in frequency domain is applied. In-plane micro-displacement measurement has been realized by speckle recording and MATLAB software programming. This method is not only making up for the inadequacies of traditional digital speckle correlation method but also simplifying the repeated adjustment in general optical measurement. Theoretical analysis and experimental results show that digital speckle correlation method in frequency domain for measuring in-plane micro-displacement has many advantages: simple system construction, fast measurement and high accuracy, the measure accuracy can be up to micro level and relative error less than 1%. |
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