11 April 2013 Multi-element, high-temperature integrated ultrasonic transducers for structural health monitoring
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This paper reports recent developments on high-temperature, multi-element integrated ultrasonic transducers (IUTs). The multi-element IUTs are fabricated from a sol-gel route, where piezoelectric films are deposited, poled and machined into an array of 16 elements. Electrical wiring and insulation are also integrated into a practical, simple high-temperature assembly. These multi-element IUTs show a high potential for structural health monitoring at high temperatures (in the 200-500°C range): they can withstand thermal cycling and shocks, they can be integrated to complex geometries, and they have broadband and suitable operating frequency characteristics with a minimal footprint (no backing needed). The specifics of multi-element transducers, including the phased array approach, for structural health monitoring are discussed.
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Jocelyn Veilleux, Jocelyn Veilleux, Silvio E. Kruger, Silvio E. Kruger, Kuo-Ting Wu, Kuo-Ting Wu, Alain Blouin, Alain Blouin, } "Multi-element, high-temperature integrated ultrasonic transducers for structural health monitoring", Proc. SPIE 8693, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2013, 86930I (11 April 2013); doi: 10.1117/12.2009868; https://doi.org/10.1117/12.2009868

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