Palmer, Stuart B., Hill, Steven M. (Mark), Rowlands, G. (George) and Dixon, S. (2013) An ultrasonic wave-front with propagation direction dependent frequency. In: Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2013, San Diego, USA, 10 Mar 2013. Published in: SPIE Proceedings, Volume 8694 Article number 86941S. doi:10.1117/12.2014314 ISSN 0277-786X.

Research output not available from this repository.

Request-a-Copy directly from author or use local Library Get it For Me service.

Request Changes to record.

Abstract

The use of phased array methods are commonplace in ultrasonic applications, where controlling the variation of the phase between the narrowband emitters in an array facilitates beam steering and focusing. An approach is presented here, whereby all emitters in a 1 dimensional array are pulsed simultaneously, with a controlled bandwidth to emit a 2 dimensional wave. The key result is that one can generate a smooth, continuous wave-front emitted from the array, over a large solid angle, whose frequency varies as a function of angle to the array. Analytic and finite element models created to simulate this phenomena have been validated with experimental results using ultrasonic waves in metal samples. This pulsed approach provides a rapid means of flooding a region of space with a wave-front, whereby any wave that scatters or reflects off a body to a detector will have a distinct arrival time and frequency. This is a general wave phenomena with potential applications in radar, sonar and ultrasound.

Item Type:	Conference Item (Paper)
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics Administration > University Executive Office
Journal or Publication Title:	SPIE Proceedings
ISSN:	0277-786X
Book Title:	Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2013
Official Date:	26 April 2013
Dates:	Date Event 26 April 2013 Published
Volume:	Volume 8694
Page Range:	Article number 86941S
DOI:	10.1117/12.2014314
Status:	Peer Reviewed
Publication Status:	Published
Conference Paper Type:	Paper
Title of Event:	Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2013
Type of Event:	Conference
Location of Event:	San Diego, USA
Date(s) of Event:	10 Mar 2013

Request changes or add full text files to a record

Repository staff actions (login required)

View Item