Measurement of Moving Speed Using a Leaky Lamb Wave Device

A technique for measuring the moving speed of a tested object is described using a leaky Lamb wave device composed of two interdigital transducers (IDTs). The IDT on a thin piezoelectric ceramic plate radiates as an ultrasound beam into a liquid and also operates as a detector of the ultrasound sign...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2001-09, Vol.40 (9S), p.5731
Main Authors: Takeshi Fujita, Takeshi Fujita, Kohji Toda, Kohji Toda
Format: Article
Language:English
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Summary:A technique for measuring the moving speed of a tested object is described using a leaky Lamb wave device composed of two interdigital transducers (IDTs). The IDT on a thin piezoelectric ceramic plate radiates as an ultrasound beam into a liquid and also operates as a detector of the ultrasound signal reflected from a moving medium, at a liquid-solid interface. The delayed output has a frequency shift via a Doppler effect, corresponding to the moving speed of the reflection object. Basic performances of the leaky Lamb wave device and the measured results of the moving speed of a metal disk are presented.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.40.5731