TY - JOUR
T1 - High-resolution 3D phased-array imaging of fatigue cracks using piezoelectric and laser ultrasonic system (PLUS)
AU - Ohara, Yoshikazu
AU - Remillieux, Marcel C.
AU - Ulrich, T. J.
AU - Ozawa, Serina
AU - Tsunoda, Kosuke
AU - Tsuji, Toshihiro
AU - Mihara, Tsuyoshi
N1 - Funding Information:
This work was partially supported by JSPS KAKENHI (19K21910, 21H04592) and JST FOREST program (JPMJFR2023).
Publisher Copyright:
© 2022 The Japan Society of Applied Physics.
PY - 2022/6
Y1 - 2022/6
N2 - This paper reports the effectiveness of a novel imaging system, piezoelectric and laser ultrasonic system (PLUS), for the three-dimensional (3D) imaging of fatigue cracks with a high-resolution. The PLUS combines a piezoelectric transmitter and the two-dimensional (2D) mechanical scanning of a laser Doppler vibrometer, enabling the 2D matrix array with an ultra-multiple number of receiving points for 3D phased array imaging. After describing the principle and 3D imaging algorithm of PLUS, we show the fundamental 3D imaging capability of the PLUS in a flat-bottom-hole specimen with varying the number of receiving points under a fixed large receiving aperture. We then demonstrate that the PLUS with 4275 receiving points (i.e. 75 × 57) achieves high-resolution 3D imaging of a fatigue crack with a high signal-to-noise ratio, providing the outline of the fatigue crack geometry. We also discuss the effectiveness of the ultra-multiple receiving points for suppressing grating lobes and random noise.
AB - This paper reports the effectiveness of a novel imaging system, piezoelectric and laser ultrasonic system (PLUS), for the three-dimensional (3D) imaging of fatigue cracks with a high-resolution. The PLUS combines a piezoelectric transmitter and the two-dimensional (2D) mechanical scanning of a laser Doppler vibrometer, enabling the 2D matrix array with an ultra-multiple number of receiving points for 3D phased array imaging. After describing the principle and 3D imaging algorithm of PLUS, we show the fundamental 3D imaging capability of the PLUS in a flat-bottom-hole specimen with varying the number of receiving points under a fixed large receiving aperture. We then demonstrate that the PLUS with 4275 receiving points (i.e. 75 × 57) achieves high-resolution 3D imaging of a fatigue crack with a high signal-to-noise ratio, providing the outline of the fatigue crack geometry. We also discuss the effectiveness of the ultra-multiple receiving points for suppressing grating lobes and random noise.
KW - 3D imaging
KW - fatigue cracks
KW - laser scan
KW - nondestructive evaluation
KW - ultrasonic phased array
UR - http://www.scopus.com/inward/record.url?scp=85131078295&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85131078295&partnerID=8YFLogxK
U2 - 10.35848/1347-4065/ac48cd
DO - 10.35848/1347-4065/ac48cd
M3 - Article
AN - SCOPUS:85131078295
SN - 0021-4922
VL - 61
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - SG
M1 - SG1043
ER -