Applications of flexible ultrasonic transducer array for defect detection at 150 °C

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DOIResolve DOI: http://doi.org/10.3390/s130100975
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TypeArticle
Journal titleSensors (Switzerland)
ISSN1424-8220
Volume13
Issue1
Pages975983; # of pages: 9
SubjectDefect detection; Flexible ultrasonic transducer; Pitch-catch; Pulse-echo mode; PZT; Total focusing method; Antenna phased arrays; Composite films; Defects; Nondestructive examination; Sol-gel process; Sol-gels; Thickness measurement; Transducers; Ultrasonic transducers; Inspection
AbstractIn 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 φ3 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. © 2013 by the authors; licensee MDPI, Basel, Switzerland.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21270545
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Record identifier3884cd6b-4260-457e-9e8c-32bfbaccbc34
Record created2014-02-17
Record modified2016-05-09
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