EMAT Generation and Laser Detection of Single Lamb Wave Modes

Thumbnail Image
Date
1998
Authors
Guo, Zhiqi
Achenbach, Jan
Krishnaswamy, Sridhar
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract

Non-contact and couplant-free nondestructive testing methods are desired in certain situations. There are several designs of non-contact transducers that have been developed. Electromagnetic acoustic transducers (EMATs) and laser-based ultrasonic sensors are well known non-contact transducers. EMATs are typically of limited bandwidth. EMATs and LBU both have lower sensitivity than conventional piezoelectric transducers, and are therefore typically useful in situations where there is sufficient signal strength, but where non-contact is necessary (EMATs and LBU), or where high spatial resolution (LBU) is needed. Thus, ultrasonic NDE schemes with various configurations have been utilized; these configurations include using EMATs as both generator and receiver [1–2], using lasers as both generator and receiver[3–4], and using a laser as source and EMATs as receiver [5].

Series Number
Journal Issue
Is Version Of
Versions
Academic or Administrative Unit
Type
event
Comments
Rights Statement
Copyright
Thu Jan 01 00:00:00 UTC 1998
Funding
DOI
Supplemental Resources