Laser & Optoelectronics Progress, Volume. 58, Issue 1, 112004(2021)

One-Plane Two-Hole Feature Positioning Method Based on Line Laser On-Machine Measurement

Zhou Yanfeng, Chen Weifang*, Cao Xinhang, and Pan Lijian
Author Affiliations
  • College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210001, China
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    Figures & Tables(15)
    Composition of line laser on-machine measurement system
    Coordinate system of line laser on-machine measurement system
    Mathematical model of line laser on-machine measurement system
    Principle of solving deflection angle
    Scanning reference hole surface by line laser
    Principle of fitting reference hole
    Test piece for workpiece positioning
    Size of test workpiece
    Line laser scanning datum plane
    Reference plane of test workpiece
    Angular deviation test of test workpiece
    Hole edge scan results. (a) Sensor point cloud map; (b) Imageware point cloud map
    • Table 1. Inclination of test workpiece along XM direction

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      Table 1. Inclination of test workpiece along XM direction

      Change of dial indicator reading along XMcoordinate ΔXM /mmChange of dial indicator reading along ZLcoordinate ΔZL /μmtan θX /10-3
      0.8077.49.1698
      3.13534.811.1005
      0.1150.97.8261
      2.93135.712.1801
      1.57413.88.7675
      Mean9.8088
    • Table 2. Inclination of test workpiece along YM direction

      View table

      Table 2. Inclination of test workpiece along YM direction

      Change of dial indicator reading along YMcoordinate ΔYM /mmChange of dial indicator reading along ZLcoordinate ΔZL /μmtan θY /10-3
      1.896-1.7-0.8966
      0.787-2.1-2.6684
      2.6097.22.7597
      0.746-1.0-1.3405
      -1.444-2.11.4543
      Mean-0.1383
    • Table 3. Fitting calculation results of test workpiece holes

      View table

      Table 3. Fitting calculation results of test workpiece holes

      HoleHole center coordinate/mmCalculation value of radius Rc /mmActual value of radius Ra /mmError /%
      TL(-0.5798,-269.8576,1.7185)8.02157.921.27
      TC(-0.6243,-207.9228,2.2697)7.82827.941.43
      TR(-0.5477,-241.8253,1.9680)8.02967.901.61
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    Zhou Yanfeng, Chen Weifang, Cao Xinhang, Pan Lijian. One-Plane Two-Hole Feature Positioning Method Based on Line Laser On-Machine Measurement[J]. Laser & Optoelectronics Progress, 2021, 58(1): 112004

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    Paper Information

    Category: Instrumentation, Measurement and Metrology

    Received: Jun. 1, 2020

    Accepted: --

    Published Online: Jan. 4, 2021

    The Author Email: Weifang Chen (meewfchen@nuaa.edu.cn)

    DOI:10.3788/LOP202158.0112004

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