Optics and Precision Engineering, Volume. 31, Issue 7, 1000(2023)

Laser triangular spot positioning combined with cross-correlation and B-spline interpolation

Jingxin DONG1... Song WAN2, Liping ZHOU3, Hui ZHAO1 and Wei TAO1,* |Show fewer author(s)
Author Affiliations
  • 1School of Electronic Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai2000, China
  • 2Shanghai West Hongqiao Navigation Technology Co, Ltd., Shanghai01100, China
  • 3Shanghai Institute of Satellite Engineering, Shanghai201700, China
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    Figures & Tables(11)
    Principle for laser triangulation ranging
    Skewed distribution spot with Scheimpflug principle
    Flow chart of filtering preprocessing
    Original wave of spot and filtered wave
    Calculation process of cross-correlation coefficient sequence
    Composition of spot center extraction experimental system
    Measurement errors of different algorithms for same test object
    Spot images and waveforms of six measured objects
    • Table 1. Repeatability errors of different algorithms for same test object

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      Table 1. Repeatability errors of different algorithms for same test object

      方 法量程近端零点量程远端
      加权质心法1.731.001.15
      高斯拟合法2.111.911.03
      高斯模板互相关法0.570.871.38
      本文算法0.390.240.25
    • Table 2. Repeatability errors of different algorithms for different test objects

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      Table 2. Repeatability errors of different algorithms for different test objects

      被测物加权质心法高斯拟合法高斯模板互相关法本文算法
      近端零点远端近端零点远端近端零点远端近端零点远端
      白色氧化铝陶瓷0.910.861.172.762.522.890.770.760.980.290.290.31
      黑色磨砂铝合金1.911.681.590.921.821.301.781.301.620.350.460.23
      半透明亚克力板1.852.322.351.732.343.021.761.612.210.460.580.74
      1000目磨砂纸1.370.760.911.482.391.331.260.570.810.170.240.11
      280目磨砂纸1.871.571.141.742.222.061.061.231.100.350.330.25
      80目磨砂纸2.261.401.312.690.940.621.550.780.910.480.350.20
    • Table 3. Standard uncertainty introduced by each component

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      Table 3. Standard uncertainty introduced by each component

      标准不确定度分量u(xi)不确定度来源标准不确定度/μm灵敏系数ci自由度νi
      u(L)与传感器示值有关的测量不确定度0.25119
      u(L1)测量重复性0.250-9
      u(L2)分辨力量化误差0.028-50
      u(Ls)量块尺寸的不确定度0.180-1
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    Jingxin DONG, Song WAN, Liping ZHOU, Hui ZHAO, Wei TAO. Laser triangular spot positioning combined with cross-correlation and B-spline interpolation[J]. Optics and Precision Engineering, 2023, 31(7): 1000

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    Paper Information

    Category: Modern Applied Optics

    Received: Sep. 6, 2022

    Accepted: --

    Published Online: Apr. 28, 2023

    The Author Email: TAO Wei (taowei@sjtu.edu.cn)

    DOI:10.37188/OPE.20233107.1000

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