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.