A2.2 - Piezoceramic Ultrasound Transducer Enabling Broadband Transmission for 3D Scene Analysis in Air

Event
SENSOR+TEST Conferences 2009
2009-05-26 - 2009-05-28
Congress Center Nürnberg
Band
Proceedings SENSOR 2009, Volume I
Chapter
A2 - Ultrasonic Sensors
Author(s)
J. Kellner, H. Schweinzer - Vienna University of Technology, Vienna, Austria
Pages
53 - 58
DOI
10.5162/sensor09/v1/a2.2
ISBN
978-3-9810993-4-8
Price
free

Abstract

Frequency-modulated ultrasound signals like chirp-signals show variations in phase at the different transmission angles. Analyzing the phase of ultrasound chirp-echoes enables to accurately determine distance and polar angle to the point of reflection. Though single piezoceramic ultrasound transducers have a small bandwidth, an ultrasound transducer made of a combination of piezoceramic elements with different resonance frequencies as presented in this work enables transmission of broadband chirpsignals and shows the required rotational symmetry.

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