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Sensors 2013, 13(1), 975-983; doi:10.3390/s130100975
Article

Applications of Flexible Ultrasonic Transducer Array for Defect Detection at 150 °C

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Received: 22 November 2012; in revised form: 10 January 2013 / Accepted: 10 January 2013 / Published: 15 January 2013
(This article belongs to the Section Physical Sensors)
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Abstract: In this study, the feasibility of using a one dimensional 16-element flexible ultrasonic transducer (FUT) array for nondestructive testing at 150 °C is demonstrated. The FUT arrays were made by a sol-gel sprayed piezoelectric film technology; a PZT composite film was sprayed on a titanium foil of 75 µm thickness. Since the FUT array is flexible, it was attached to a steel pipe with an outer diameter of 89 mm and a wall thickness of 6.5 mm at 150 °C. Using the ultrasonic pulse-echo mode, pipe thickness measurements could be performed. Moreover, using the ultrasonic pulse-echo and pitch-catch modes of each element of FUT array, the defect detection was performed on an Al alloy block of 30 mm thickness with a side-drilled hole (SDH) of f3 mm at 150 °C. In addition, a post-processing algorithm based on the total focusing method was used to process the full matrix of these A-scan signals of each single transmitter and multi-receivers, and then the phase-array image was obtained to indicate this defect- SDH. Both results show the capability of FUT array being operated at 150 °C for the corrosion and defect detections.
Keywords: flexible ultrasonic transducer array; PZT sol-gel; pulse-echo mode; pitch-catch mode; total focusing method; phased-array imaging; defect detection flexible ultrasonic transducer array; PZT sol-gel; pulse-echo mode; pitch-catch mode; total focusing method; phased-array imaging; defect detection
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Shih, J.-L.; Wu, K.-T.; Jen, C.-K.; Chiu, C.-H.; Tzeng, J.-C.; Liaw, J.-W. Applications of Flexible Ultrasonic Transducer Array for Defect Detection at 150 °C. Sensors 2013, 13, 975-983.

AMA Style

Shih J-L, Wu K-T, Jen C-K, Chiu C-H, Tzeng J-C, Liaw J-W. Applications of Flexible Ultrasonic Transducer Array for Defect Detection at 150 °C. Sensors. 2013; 13(1):975-983.

Chicago/Turabian Style

Shih, Jeanne-Louise; Wu, Kuo-Ting; Jen, Cheng-Kuei; Chiu, Chun-Hsiung; Tzeng, Jing-Chi; Liaw, Jiunn-Woei. 2013. "Applications of Flexible Ultrasonic Transducer Array for Defect Detection at 150 °C." Sensors 13, no. 1: 975-983.


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