Enhancement of Selectivity in Nonlinear Ultrasonic Imaging of Closed Cracks Using Amplitude Difference Phased Array

2012 ◽  
Vol 51 (7S) ◽  
pp. 07GB18 ◽  
Author(s):  
Yoshikazu Ohara ◽  
Yohei Shintaku ◽  
Satoshi Horinouchi ◽  
Masako Ikeuchi ◽  
Kazushi Yamanaka
Keyword(s):  
Phased Array ◽  
Ultrasonic Imaging ◽  
Amplitude Difference ◽  
Nonlinear Ultrasonic

Enhancement of Selectivity in Nonlinear Ultrasonic Imaging of Closed Cracks Using Amplitude Difference Phased Array

2012 ◽  
Vol 51 ◽  
pp. 07GB18 ◽  
Author(s):  
Yoshikazu Ohara ◽  
Yohei Shintaku ◽  
Satoshi Horinouchi ◽  
Masako Ikeuchi ◽  
Kazushi Yamanaka
Keyword(s):  
Phased Array ◽  
Ultrasonic Imaging ◽  
Amplitude Difference ◽  
Nonlinear Ultrasonic

scholarly journals Ultrasonic Imaging of Thick Carbon Fiber Reinforced Polymers through Pulse-Compression-Based Phased Array

2021 ◽  
Vol 11 (4) ◽  
pp. 1508
Author(s):  
Muhammad Khalid Rizwan ◽  
Stefano Laureti ◽  
Hubert Mooshofer ◽  
Matthias Goldammer ◽  
Marco Ricci
Keyword(s):  
Carbon Fiber ◽  
Pulse Compression ◽  
Phased Array ◽  
Signal To Noise Ratio ◽  
Near Field ◽  
Ultrasonic Imaging ◽  
Fiber Reinforced Polymers ◽  
Fiber Reinforced ◽  
Custom Made ◽  
Carbon Fiber Reinforced

The use of pulse-compression in ultrasonic non-destructive testing has assured, in various applications, a significant improvement in the signal-to-noise ratio. In this work, the technique is combined with linear phased array to improve the sensitivity and resolution in the ultrasonic imaging of highly attenuating and scattering materials. A series of tests were conducted on a 60 mm thick carbon fiber reinforced polymer benchmark sample with known defects using a custom-made pulse-compression-based phased array system. Sector scan and total focusing method images of the sample were obtained with the developed system and were compared with those reconstructed by using a commercial pulse-echo phased array system. While an almost identical sensitivity was found in the near field, the pulse-compression-based system surpassed the standard one in the far-field producing a more accurate imaging of the deepest defects and of the backwall of the sample.

Nonlinear ultrasonic imaging method for closed cracks using subtraction of responses at different external loads

Ultrasonics ◽  
2011 ◽  
Vol 51 (6) ◽  
pp. 661-666 ◽  
Author(s):  
Yoshikazu Ohara ◽  
Satoshi Horinouchi ◽  
Makoto Hashimoto ◽  
Yohei Shintaku ◽  
Kazushi Yamanaka
Keyword(s):  
Ultrasonic Imaging ◽  
Imaging Method ◽  
Nonlinear Ultrasonic ◽  
External Loads

Ultrasonic imaging of stress corrosion crack formed in high temperature pressurized water using subharmonic phased array

2010 ◽  
Author(s):  
Yoshikazu Ohara ◽  
Yohei Shintaku ◽  
Satoshi Horinouchi ◽  
Makoto Hashimoto ◽  
Yuichi Yamaguchi ◽  
...  
Keyword(s):  
High Temperature ◽  
Stress Corrosion ◽  
Stress Corrosion Crack ◽  
Phased Array ◽  
Ultrasonic Imaging ◽  
Pressurized Water
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