Gaal, Mate ; Caldeira, Rui ; Bartusch, Jürgen ; Kupnik, Mario (2017)
Air-Coupled Ultrasonic Ferroelectret Receiver with Additional DC Voltage.
In: Proceedings, 1 (4)
doi: 10.3390/proceedings1040362
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Highly sensitive air-coupled ultrasonic sensors are essential for various applications such as testing of composite materials. One of the major challenges for the development of air-coupled ultrasonic sensors is the impedance matching to air. With a lower acoustic impedance than the usual piezoelectric materials, charged cellular polypropylene film (cPP) offers better matching to air with a similar piezoelectric coefficient. The piezoelectric behaviour demonstrated by cPP comes from polarized air cells that create a permanent internal voltage. The sensitivity of the sensor varies with the application of an additional DC bias voltage. Thus, this work presents a cPP ultrasonic sensor with an improvement of up to 15 ± 1 dB on the signal-to-noise ratio.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Gaal, Mate ; Caldeira, Rui ; Bartusch, Jürgen ; Kupnik, Mario |
| Art des Eintrags: | Bibliographie |
| Titel: | Air-Coupled Ultrasonic Ferroelectret Receiver with Additional DC Voltage |
| Sprache: | Englisch |
| Publikationsjahr: | 2017 |
| Ort: | Basel |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Proceedings |
| Jahrgang/Volume einer Zeitschrift: | 1 |
| (Heft-)Nummer: | 4 |
| Kollation: | 4 Seiten |
| DOI: | 10.3390/proceedings1040362 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Highly sensitive air-coupled ultrasonic sensors are essential for various applications such as testing of composite materials. One of the major challenges for the development of air-coupled ultrasonic sensors is the impedance matching to air. With a lower acoustic impedance than the usual piezoelectric materials, charged cellular polypropylene film (cPP) offers better matching to air with a similar piezoelectric coefficient. The piezoelectric behaviour demonstrated by cPP comes from polarized air cells that create a permanent internal voltage. The sensitivity of the sensor varies with the application of an additional DC bias voltage. Thus, this work presents a cPP ultrasonic sensor with an improvement of up to 15 ± 1 dB on the signal-to-noise ratio. |
| Freie Schlagworte: | ultrasonic, air-coupled, cellular polypropylene, transducer, ferroelectret |
| Zusätzliche Informationen: | This article belongs to the Proceedings of Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 621.3 Elektrotechnik, Elektronik |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Mess- und Sensortechnik |
| Hinterlegungsdatum: | 12 Mär 2024 09:56 |
| Letzte Änderung: | 12 Mär 2024 09:56 |
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| Suche nach Titel in: | TUfind oder in Google |
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Air-Coupled Ultrasonic Ferroelectret Receiver with Additional DC Voltage. (deposited 19 Jan 2024 14:28)
- Air-Coupled Ultrasonic Ferroelectret Receiver with Additional DC Voltage. (deposited 12 Mär 2024 09:56) [Gegenwärtig angezeigt]
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