The Use of Flexible Ultrasound Transducers for the Detection of Laser-Induced Guided Waves on Curved Surfaces at Elevated Temperatures
In this study, a flexible ultrasonic transducer (FUT) was applied in a laser ultrasonic technique (LUT) for non-destructive characterization of metallic pipes at high temperatures of up to 176 °C. Compared with normal ultrasound transducers, a FUT is a piezoelectric film made of a PZT/PZT sol-gel co...
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doaj-58a71389644a40bdac851f8d0d859daf2020-11-24T21:47:47ZengMDPI AGSensors1424-82202017-06-01176128510.3390/s17061285s17061285The Use of Flexible Ultrasound Transducers for the Detection of Laser-Induced Guided Waves on Curved Surfaces at Elevated TemperaturesTai Chieh Wu0Makiko Kobayashi1Masayuki Tanabe2Che Hua Yang3College of Mechanical and Electrical Engineering, National Taipei University of Technology, Taipei 10608, TaiwanFaculty of Advanced Science and Technology, Kumamoto University, Kumamoto 8608555, JapanFaculty of Advanced Science and Technology, Kumamoto University, Kumamoto 8608555, JapanCollege of Mechanical and Electrical Engineering, National Taipei University of Technology, Taipei 10608, TaiwanIn this study, a flexible ultrasonic transducer (FUT) was applied in a laser ultrasonic technique (LUT) for non-destructive characterization of metallic pipes at high temperatures of up to 176 °C. Compared with normal ultrasound transducers, a FUT is a piezoelectric film made of a PZT/PZT sol-gel composite which has advantages due to its high sensitivity, curved surface adaptability and high temperature durability. By operating a pulsed laser in B-scan mode along with the integration of FUT and LUT, a multi-mode dispersion spectrum of a stainless steel pipe at high temperature can be measured. In addition, dynamic wave propagation behaviors are experimentally visualized with two dimensional scanning. The images directly interpret the reflections from the interior defects and also can locate their positions. This hybrid technique shows great potential for non-destructive evaluation of structures with complex geometry, especially in high temperature environments.http://www.mdpi.com/1424-8220/17/6/1285flexible ultrasonic transducerlaser ultrasonic techniquelaser ultrasonic visualizationmaterial characterizationdefect detectionNon-destructive testinghigh temperature measurement |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tai Chieh Wu Makiko Kobayashi Masayuki Tanabe Che Hua Yang |
spellingShingle |
Tai Chieh Wu Makiko Kobayashi Masayuki Tanabe Che Hua Yang The Use of Flexible Ultrasound Transducers for the Detection of Laser-Induced Guided Waves on Curved Surfaces at Elevated Temperatures Sensors flexible ultrasonic transducer laser ultrasonic technique laser ultrasonic visualization material characterization defect detection Non-destructive testing high temperature measurement |
author_facet |
Tai Chieh Wu Makiko Kobayashi Masayuki Tanabe Che Hua Yang |
author_sort |
Tai Chieh Wu |
title |
The Use of Flexible Ultrasound Transducers for the Detection of Laser-Induced Guided Waves on Curved Surfaces at Elevated Temperatures |
title_short |
The Use of Flexible Ultrasound Transducers for the Detection of Laser-Induced Guided Waves on Curved Surfaces at Elevated Temperatures |
title_full |
The Use of Flexible Ultrasound Transducers for the Detection of Laser-Induced Guided Waves on Curved Surfaces at Elevated Temperatures |
title_fullStr |
The Use of Flexible Ultrasound Transducers for the Detection of Laser-Induced Guided Waves on Curved Surfaces at Elevated Temperatures |
title_full_unstemmed |
The Use of Flexible Ultrasound Transducers for the Detection of Laser-Induced Guided Waves on Curved Surfaces at Elevated Temperatures |
title_sort |
use of flexible ultrasound transducers for the detection of laser-induced guided waves on curved surfaces at elevated temperatures |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2017-06-01 |
description |
In this study, a flexible ultrasonic transducer (FUT) was applied in a laser ultrasonic technique (LUT) for non-destructive characterization of metallic pipes at high temperatures of up to 176 °C. Compared with normal ultrasound transducers, a FUT is a piezoelectric film made of a PZT/PZT sol-gel composite which has advantages due to its high sensitivity, curved surface adaptability and high temperature durability. By operating a pulsed laser in B-scan mode along with the integration of FUT and LUT, a multi-mode dispersion spectrum of a stainless steel pipe at high temperature can be measured. In addition, dynamic wave propagation behaviors are experimentally visualized with two dimensional scanning. The images directly interpret the reflections from the interior defects and also can locate their positions. This hybrid technique shows great potential for non-destructive evaluation of structures with complex geometry, especially in high temperature environments. |
topic |
flexible ultrasonic transducer laser ultrasonic technique laser ultrasonic visualization material characterization defect detection Non-destructive testing high temperature measurement |
url |
http://www.mdpi.com/1424-8220/17/6/1285 |
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