Ray trace modeling of multipath in ultrasound power measurement system

Authors

  • Lixue Wu Institute for National Measurement Standards, National Research Council Canada, 1200 Montreal Rd., Ottawa, Ont. K1A 0R6, Canada

Keywords:

Acoustic variables measurement, Speed control, Ultrasonics, Multipath, Reflecting surfaces, Ultrasound sources

Abstract

A ray tracing ultrasound model that calculates the ultrasound pressure at some point in a water tank remote from an ultrasound source is described. The method parallels the process of geometric optics and assumes constant ultrasound speed in water. The discussion of an experiment results shows the validation of the ray trace modeling method, and an algorithm is also presented that finds the optimal measurement settings for an existing ultrasound power measurement system to minimize the effect of multipath. The formation of multiple images of an ultrasound source due to the reflecting surfaces can further simplify the calculation. A tone-burst signal was fed to the transducer so that the direct waves and reflections can be distinguished by their different arrival times at the hydrophone. Experimental data showed that the measured beam shapes are within ?5 mm of those calculated by the ray trace model.

Published

2007-09-01

How to Cite

1.
Wu L. Ray trace modeling of multipath in ultrasound power measurement system. Canadian Acoustics [Internet]. 2007Sep.1 [cited 2021Apr.12];35(3):152-3. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1946

Issue

Vol. 35 No. 3 (2007)

Section

Proceedings of the Acoustics Week in Canada

Copyright on articles is held by the author(s). The corresponding author has the right to grant on behalf of all authors and does grant on behalf of all authors, a worldwide exclusive licence (or non-exclusive license for government employees) to the Publishers and its licensees in perpetuity, in all forms, formats and media (whether known now or created in the future)
i)    to publish, reproduce, distribute, display and store the Contribution;
ii)    to translate the Contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or, abstracts of the Contribution;
iii)    to exploit all subsidiary rights in the Contribution,
iv)    to provide the inclusion of electronic links from the Contribution to third party material where-ever it may be located;
v)    to licence any third party to do any or all of the above.