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Optimization of multiscale digital speckle patterns for multiscale deformation measurement using stereo-digital image correlation

机译:使用立体数字图像相关性的多尺度变形测量的多尺度数字散斑图案的优化

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摘要

Simultaneous monitoring of multiple fields of view (FOVs) by multiscale stereo-digital image correlation (stereo-DIC) can quantify the deformation of a material when localized phenomena occur within a larger FOV or moving object. In multiscale deformation measurement via stereo-DIC, optimization of the digital speckle patterns (DSPs) is essential to achieve high accuracy and efficiency. This work optimizes and fabricates multispectral DSPs used for multiple scales. First, an optimization of the DSP for two FOVs is achieved using both spatial modulation and specified spectra. A spatially modulated DSP is compared with two spectral DSPs achieved by visible and ultraviolet-excited blue light. Then, a spatially modulated visible DSP fabricated by an ultraviolet printer overlaid with an ultraviolet-excited blue DSP fabricated by a photosensitive seal is designed for multiscale stereo-DIC measurements of three FOVs. Experiments were performed to illustrate the functionality and utility of this multiscale DSP. Such experimental analyses can supply adequate full-field data to validate localized or kinetic mechanical behavior. (C) 2021 Optical Society of America
机译:通过多尺度立体数字图像相关(stereo DIC)对多个视场(FOV)进行同时监测,可以量化在较大的FOV或运动物体内发生局部现象时材料的变形。在基于立体DIC的多尺度变形测量中,数字散斑图(DSP)的优化是实现高精度和高效率的关键。这项工作优化和制造了用于多尺度的多光谱DSP。首先,利用空间调制和指定的频谱,对两个FOV的DSP进行优化。将空间调制的DSP与由可见光和紫外光激发的蓝光实现的两种光谱DSP进行了比较。然后,设计了一个由紫外打印机制作的空间调制可见光DSP,其上覆盖了由光敏密封制作的紫外激发蓝色DSP,用于三个FOV的多尺度立体DIC测量。通过实验验证了该多尺度DSP的功能和实用性。这样的实验分析可以提供足够的全场数据来验证局部或动力学力学行为。(2021)美国光学学会

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  • 来源
    《Applied optics》 |2021年第16期|共10页
  • 作者单位

    Nanjing Univ Aeronaut &

    Astronaut Coll Aerosp Engn Nanjing 210016 Peoples R China;

    Southeast Univ Dept Engn Mech Jiangsu Key Lab Engn Mech Nanjing 211189 Peoples R China;

    Nanjing Univ Aeronaut &

    Astronaut Coll Aerosp Engn Nanjing 210016 Peoples R China;

    Nanjing Univ Aeronaut &

    Astronaut Coll Aerosp Engn Nanjing 210016 Peoples R China;

    Southeast Univ Dept Engn Mech Jiangsu Key Lab Engn Mech Nanjing 211189 Peoples R China;

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