         | ||||||||
|
Tutorials Micro-Optic and Fiber Optic Sensors Terahertz Sensing Noise Harvesting Chemical and Gas Sensing Industrial Tomography Silicon Piezoresistive Stress Sensors Miniaturised Space Payloads Integrated Gas Sensors Sensors as Communication Channels Nanophotonic Sensors Biopolymer Detection Integrated Radar Sensors Ultrasonics |
|
Ultrasonics is a field which is well known, seemingly everyone has at least some rudimentary knowledge and experience. This tutorial will attempt to reinforce, perhaps extend, this knowledge. The tutorial will initially cover wave propagation in fluids and solids using video generated during finite element modelling. Reflections from interface layers and cracks, and interface/surface wave types will be considered. We will then address waves propagating in (micro)structured media, and wood. Conventional transducer design and recent advances e.g. kerfless annular, will be discussed. We will give an overview of systems design and a description of a high end system with some images. We will then discuss the reasoning for some of the recent trends in ultrasonics including harmonic imaging, the use of contrast agents, acoustic radiation force imaging (ARFI) and elasticity imaging. Biography Paul Harris is a scientist at Industrial Research Limited, Wellington, New Zealand and has been developing high frequency ultrasonic systems for about a decade. Paul received a BE in electronics at the University of Canterbury, his final year project being an ultrasonic aid for divers working on the North Sea oil platforms. He was employed by Marconi Space and Defence, Hillend, Scotland to work on related underwater ultrasonics projects. He returned to New Zealand in 1982 and since that time has been employed by IRL (formally the Dept of Scientific and Industrial Research) developing many sensors and systems. |
|
||||
 | ||||||||
Copyright 2008, All Rights Reserved, IEEE Sensors 2009 and interteq.com