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首页> 外文期刊>NDT & E international >Model-based measurement of internal geometry of solid parts with sub-PSF accuracy using laser-ultrasonic imaging
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Model-based measurement of internal geometry of solid parts with sub-PSF accuracy using laser-ultrasonic imaging

机译：基于模型的固态零件内部几何形状的激光超声成像测量，具有不到PSF的精度

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摘要

The problem of workpiece tolerance verification is of high interest in the field of nondestructive testing and evaluation. In this paper, reflection mode immersion 2D laser-ultrasound tomography is proposed for control of dimensions of solid objects with piecewise linear surface profiles. Pulsed laser radiation is used for generation of short ultrasonic probe pulse providing high spatial resolution. Wideband array of piezofilm sensors is used for detection of the waves reflected by the external and internal surfaces of the object. The image reconstruction algorithm accounts for refraction of acoustic waves at the liquid-solid interface. The contrast-enhanced reconstructed image is processed using the virtual model of the inspected part and the least-squares method to measure its actual dimensions. The accuracy obtained in the experiments with PMMA and duralumin samples is better than 100 mu m in axial direction and is better than the size of the point-spread function in the material of the inspected part.
机译：工件公差验证的问题在无损检测和评估领域引起了极大的兴趣。在本文中，提出了使用反射模式浸没式二维激光超声层析成像技术来控制具有分段线性表面轮廓的固体物体的尺寸。脉冲激光辐射用于产生短的超声波探头脉冲，从而提供较高的空间分辨率。压电薄膜传感器的宽带阵列用于检测物体外表面和内表面反射的波。图像重建算法考虑了声波在液-固界面处的折射。使用被检零件的虚拟模型和最小二乘法来处理对比度增强的重建图像，以测量其实际尺寸。在使用PMMA和硬铝粉样品进行的实验中，轴向精度优于100μm，并且优于被检零件材料中点扩散函数的大小。

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  • 来源
    《NDT & E international》 |2019年第7期|56-63|共8页
  • 作者

    Zarubin Vasily; Bychkov Anton; Zhigarkov Vyacheslav; Karabutov Alexander; Cherepetskaya Elena;

  • 作者单位

    Natl Univ Sci & Technol MISIS, 4 Leninsky Prospekt, Moscow 119049, Russia|Lomonosov Moscow State Univ, Fac Phys, 1 Leninskie Gory, Moscow 119991, Russia;

    Natl Univ Sci & Technol MISIS, 4 Leninsky Prospekt, Moscow 119049, Russia|Lomonosov Moscow State Univ, Fac Phys, 1 Leninskie Gory, Moscow 119991, Russia;

    Russian Acad Sci, FRSC Crystallog & Phoron, Inst Photon Technol, 2 Pionerskaya SS, Moscow 108840, Russia;

    Natl Univ Sci & Technol MISIS, 4 Leninsky Prospekt, Moscow 119049, Russia|Lomonosov Moscow State Univ, Int Laser Ctr, 1 Leninskie Gory,Bld 62, Moscow 119991, Russia|Russian Acad Sci, Inst Laser & Informat Technol, 1 Svyatoozerskaya S4, Moscow 140700, Russia;

    Natl Univ Sci & Technol MISIS, 4 Leninsky Prospekt, Moscow 119049, Russia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    laser ultrasound; Imaging; Tomography; Image processing; Geometry of solids; Refraction; Point-spread function; Model-based;

    机译：激光超声;成像;层析成像;图像处理;固体几何形状;折射;点扩展函数;基于模型;

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