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
- Laser & Optoelectronics Progress
- Vol. 57, Issue 17, 171203 (2020)
Fig. 1. Laser ultrasonic C-scan detection. (a) Detection device; (b) detection schematic
Fig. 2. Experimental sample. (a) Schematic diagram of the sample; (b) sample size
Fig. 3. Propagation path of laser ultrasonic
Fig. 4. Variation curves of t with D of different ultrasonic modes
Fig. 5. Schematic diagram of the detection device
Fig. 6. Relationship between D and ultrasonic waveform
Fig. 7. Ultrasonic waveforms at different D
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
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
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
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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