Method for determining the wall thickness and the speed of sound in a tube from reflected and transmitted ultrasound pulses
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United States of America Patent
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Apr 26, 2005
Grant Date -
Mar 18, 2004
app pub date -
Sep 11, 2003
filing date -
Jan 23, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for the determining ultrasonic sound propagation speed and wall thickness of a tubular object. Time-domain and frequency-domain analyses are used, where the latter can determine acoustic dispersion if the specimen is made up of a dispersive material. Data is sensed from a series of transmitted ultrasonic waves, some of which are reflected. The data can be used to calculate speed of sound in the tube, as well as wall thickness. Inherent in the data is the speed of the ultrasonic wave; accordingly, correction for temperature variations in the tube is not required. The calculations based on measured speed of sound quantities produces more accurate results than in calculations where the speed of sound in the specimen is assumed.
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