Ferroelectret transducers for air-coupled ultrasonic testing of fiber-reinforced polymers

Autor:	Thorid Lange, Mate Gaal, Joachim Döring, Gerhard Brekow, Marc Kreutzbruck, Jürgen Bartusch, W. Hillger
Rok vydání:	2013
Předmět:	Polypropylene chemistry.chemical_classification Materials science Acoustics Ultrasonic testing Polymer chemistry.chemical_compound Capacitive micromachined ultrasonic transducers Transducer chemistry Ultrasonic sensor Fiber Ferroelectret Composite material
Zdroj:	AIP Conference Proceedings.
ISSN:	0094-243X
Popis:	Ferroelectrets are promising materials for air-coupled ultrasonic transducers. A transducer made of polarized cellular polypropylene, including its electronic interface, was developed and compared with conventional air-coupled probes. Test pieces of fiber-reinforced polymer containing impact flaws and flat-bottom holes were inspected in transmission. The ferroelectret transducers achieved a considerably higher signal-to-noise ratio. The impacts were clearly visible with all transducers, but less noisy with ferroelectret transducers. The flat-bottom holes were better detectable than with a conventional probe with about the same focus size.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::803e21cea4c7770139bff1f8c3d8914b https://doi.org/10.1063/1.4789224 Zobrazit plný text záznamu