DocumentCode :
1323377
Title :
Fibre optic system for the monitoring of asymmetric Lamb wave modulation in thin films
Author :
Dewhurst, R.J. ; Williams, B.A.
Author_Institution :
Dept. of Instrum. & Anal. Sci., Univ. of Manchester Inst. of Sci. & Technol., UK
Volume :
33
Issue :
21
fYear :
1997
fDate :
10/9/1997 12:00:00 AM
Firstpage :
1813
Lastpage :
1815
Abstract :
For monitoring temporal modulation of a laser-generated asymmetric (a0) Lamb wave, a non-contact fibre optic sensor has been used. Simultaneously, an electromagnetic acoustic transducer (EMAT) sensed in-plane acoustic transients of the symmetric (s0) Lamb wave. Measurements in 75 μm thick aluminium film show that a0 amplitude modulation is associated with a perturbation from the symmetric wave
Keywords :
fibre optic sensors; 75 micron; Al; amplitude modulation; asymmetric Lamb wave modulation; electromagnetic acoustic transducer; in-plane acoustic transients; noncontact fibre optic sensor; symmetric wave perturbation; temporal modulation;
fLanguage :
English
Journal_Title :
Electronics Letters
Publisher :
iet
ISSN :
0013-5194
Type :
jour
DOI :
10.1049/el:19971180
Filename :
633411
Link To Document :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=1323377
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