Laser & Optoelectronics Progress, Volume. 60, Issue 3, 0312020(2023)
Wavenumber-Domain Fast Reconstruction Technique Using Ultrasonic Scanning for Transverse Wave Imaging
Figures & Tables(15)
Fig. 2. Principle of exploding reflecting model (ERM). (a) Equivalent route path for ERM; (b) scenes of multi-points exciting waves together, amplitude proportional reflection coefficient, and sound field synthesis and all probes receiving simultaneously
Fig. 5. Comparison of imaging for longitudinal and transverse waves at same refraction angle of 45°. (a), (d), (g) Respectively represent test specimen setups for side-drilled holes (SDHs), vertical cracks (cracks), and semi-spherical flat-bottomed holes (FBHs); (b), (e), (h) respectively represent images for longitudinal wave upon SDHs, cracks, and FBHs; (c), (f), (i) respectively represent images for transverse wave upon SDHs, cracks, and FBHs
Fig. 6. Multi-angle transverse wave imaging for vertical SDHs; (a) Test specimen setup for multi-angle transverse wave vertical SDHs; vertical SDHs imaging with refraction angles of (b) 20°, (c) 30°, (d) 40°, (e) 50°, and (f) 60°, respectively
Fig. 7. API rectangle imaging area for top and bottom SDHs with each transverse wave refraction angle. (a), (c), (e), (g), (f) Respectively represent imaging for top SDHs at refraction angles of 20°, 30°, 40°, 50°, and 60°; (b), (d), (f), (h), (j) respectively represent imaging for bottom SDHs at refraction angles of 20°, 30°, 40°, 50°, and 60°
Fig. 8. Effect comparison of proposed method and conventional time-domain method under 40° transverse wave refraction. (a) Whole image and API images for first and fourth SDHs respectively using proposed method; (b) whole image and API images for first and fourth SDHs respectively using conventional time-domain method
Fig. 10. Defects distribution for experimental specimens. (a) Test specimens contain right side oblique placed SDHs with diameter of 1 mm; (b) test specimens contain a series of 3-mm spacing FBHs with diameters of 1, 2, 3, 4, and 6 mm respectively
Fig. 11. Experimental SDH imaging with refraction angles of (a) 30°, (b) 45°, and (c) 60°, respectively when refracting into aluminum block
Table 1. Refractive angles of longitudinal and transverse waves at different incidence angles
View tableTable 1. Refractive angles of longitudinal and transverse waves at different incidence angles
Incidence angle /（°） 0 10.2 14.5 9 13.3 17.2 18.9 20.6 23.4 27.3 Refractive angle of longitudinal wave /（°） 0 45 First critical angle 0 0 — — — — — Refractive angle of transverse wave /（°） 0 — — 20 30 40 45 50 60 Second critical angle
Table 2. API values for ultrasonic testing imaging of SDHs using transverse waves
View tableTable 2. API values for ultrasonic testing imaging of SDHs using transverse waves
Angle /（°） API SDH1 SDH2 SDH3 SDH4 20 0.043 0.041 0.037 0.035 30 0.033 0.029 0.027 0.026 40 0.032 0.034 0.033 0.032 50 0.038 0.036 0.034 0.033 60 0.041 0.040 0.036 0.028
Table 3. Incidence and refraction angles used for experiments
View tableTable 3. Incidence and refraction angles used for experiments
Longitudinal wave incidence angle /（°） 9.5 9.5 First critical：13.6 17.2 19.8 21.5 24.5 Last critical：28.6 Transverse wave refraction angle /（°） 20.2 20.2 29.4 30 40 45 60 —
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Mu Chen, Haoran Jin, Keji Yang, Bingfeng Ju. Wavenumber-Domain Fast Reconstruction Technique Using Ultrasonic Scanning for Transverse Wave Imaging[J]. Laser & Optoelectronics Progress, 2023, 60(3): 0312020
Paper Information
Category: Instrumentation, Measurement and Metrology
Received: Nov. 21, 2022
Accepted: Dec. 27, 2022
Published Online: Feb. 14, 2023
The Author Email: Haoran Jin (Jinhr@zju.edu.cn)
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