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Laser & Optoelectronics Progress, Volume. 57, Issue 17, 171203(2020)

Method of Measuring the Width of Stiffeners by Using Laser Ultrasonic C-Scan

Peixin Lu1, Dong Wang1,2, and Yang Li1,2、*
Author Affiliations
  • 1School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China
  • 2Henan Provincial Engineering Laboratory for Anti-Fatigue Manufacturing Technology, Zhengzhou, Henan 450001, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (12)
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    References (20)
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    Figures & Tables(12)
    Laser ultrasonic C-scan detection. (a) Detection device; (b) detection schematic

    Fig. 1. Laser ultrasonic C-scan detection. (a) Detection device; (b) detection schematic

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    Experimental sample. (a) Schematic diagram of the sample; (b) sample size

    Fig. 2. Experimental sample. (a) Schematic diagram of the sample; (b) sample size

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    Propagation path of laser ultrasonic

    Fig. 3. Propagation path of laser ultrasonic

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    Variation curves of t with D of different ultrasonic modes

    Fig. 4. Variation curves of t with D of different ultrasonic modes

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    Schematic diagram of the detection device

    Fig. 5. Schematic diagram of the detection device

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    Relationship between D and ultrasonic waveform

    Fig. 6. Relationship between D and ultrasonic waveform

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    Ultrasonic waveforms at different D

    Fig. 7. Ultrasonic waveforms at different D

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    Results of laser ultrasonic C-scan of stiffeners with different widths. (a) d=2.0 mm; (b) d=2.5 mm; (c) d=3.0 mm; (d) d=3.5 mm; (e) d=4.0 mm

    Fig. 8. Results of laser ultrasonic C-scan of stiffeners with different widths. (a) d=2.0 mm; (b) d=2.5 mm; (c) d=3.0 mm; (d) d=3.5 mm; (e) d=4.0 mm

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    Laser ultrasonic C-scan results after wavelet reduction. (a) d=2.0 mm; (b) d=2.5 mm; (c) d=3.0 mm; (d) d=3.5 mm; (e) d=4.0 mm

    Fig. 9. Laser ultrasonic C-scan results after wavelet reduction. (a) d=2.0 mm; (b) d=2.5 mm; (c) d=3.0 mm; (d) d=3.5 mm; (e) d=4.0 mm

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    Laser ultrasonic C-scan results after mean filtering. (a) d=2.0 mm; (b) d=2.5 mm; (c) d=3.0 mm; (d) d=3.5 mm; (e) d=4.0 mm

    Fig. 10. Laser ultrasonic C-scan results after mean filtering. (a) d=2.0 mm; (b) d=2.5 mm; (c) d=3.0 mm; (d) d=3.5 mm; (e) d=4.0 mm

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    Laser ultrasonic C-scan results after adaptive segmentation. (a) d=2.0 mm; (b) d=2.5 mm; (c) d=3.0 mm; (d) d=3.5 mm; (e) d=4.0 mm

    Fig. 11. Laser ultrasonic C-scan results after adaptive segmentation. (a) d=2.0 mm; (b) d=2.5 mm; (c) d=3.0 mm; (d) d=3.5 mm; (e) d=4.0 mm

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    • Table 1. Measurement results of stiffener width

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      Table 1. Measurement results of stiffener width

      Actual width /mmMeasuring width /mmImage average width /mmAbsolute error /mmRelative error /%
      2.02.032.04380.01380.68
      2.52.532.5113-0.01870.73
      3.02.992.9438-0.04621.55
      3.53.523.5000-0.02000.57
      4.04.034.08000.05001.24
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    Peixin Lu, Dong Wang, Yang Li. Method of Measuring the Width of Stiffeners by Using Laser Ultrasonic C-Scan[J]. Laser & Optoelectronics Progress, 2020, 57(17): 171203

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    Paper Information

    Category: Instrumentation, Measurement and Metrology

    Received: Dec. 6, 2019

    Accepted: Jan. 6, 2020

    Published Online: Sep. 1, 2020

    The Author Email: Yang Li (yangli@zzu.edu.cn)

    DOI:10.3788/LOP57.171203

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology