Electromagnetic Hydrophone with Tomographic System for Absolute Velocity Field Mapping
Classical Physics
2012-07-03 v1 Medical Physics
Abstract
The velocity and pressure of an ultrasonic wave can be measured by an electromagnetic hydrophone made of a thin wire and a magnet. The ultrasonic wave vibrates the wire inside a magnetic field, inducing an electrical current. Previous articles reported poor spatial resolution of comparable hydrophones along the axis of the wire. In this study, submillimetric spatial resolution has been achieved by using a tomographic method. Moreover, a physical model is presented for obtaining absolute measurements. A pressure differential of 8% has been found between piezoelectric and electromagnetic hydrophone measurements. These characteristics show this technique as an alternative to standard hydrophones.
Keywords
Cite
@article{arxiv.1207.0324,
title = {Electromagnetic Hydrophone with Tomographic System for Absolute Velocity Field Mapping},
author = {Pol Grasland-Mongrain and Bruno Gilles and Jean-Martial Mari and Jean-Yves Chapelon and Cyril Lafon},
journal= {arXiv preprint arXiv:1207.0324},
year = {2012}
}