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Air-Coupled Ultrasonic Ferroelectret Receiver with Additional DC Voltage

Gaal, Mate ; Caldeira, Rui ; Bartusch, Jürgen ; Kupnik, Mario (2024)
Air-Coupled Ultrasonic Ferroelectret Receiver with Additional DC Voltage.
In: Proceedings, 2017, 1 (4)
doi: 10.26083/tuprints-00015412
Article, Secondary publication, Publisher's Version

Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

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Item Type: Article
Type of entry: Secondary publication
Title: Air-Coupled Ultrasonic Ferroelectret Receiver with Additional DC Voltage
Language: English
Date: 19 January 2024
Place of Publication: Darmstadt
Year of primary publication: 2017
Place of primary publication: Basel
Publisher: MDPI
Journal or Publication Title: Proceedings
Volume of the journal: 1
Issue Number: 4
Collation: 4 Seiten
DOI: 10.26083/tuprints-00015412
Corresponding Links:
Origin: Secondary publication DeepGreen

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.

Uncontrolled Keywords: ultrasonic, air-coupled, cellular polypropylene, transducer, ferroelectret
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-154120
Additional Information:

This article belongs to the Proceedings of Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017

Classification DDC: 600 Technology, medicine, applied sciences > 621.3 Electrical engineering, electronics
Divisions: 18 Department of Electrical Engineering and Information Technology > Measurement and Sensor Technology
Date Deposited: 19 Jan 2024 14:28
Last Modified: 21 Mar 2024 15:14
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/15412
PPN: 516469886
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