Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2008-04-08
2008-04-08
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
Reexamination Certificate
active
11174496
ABSTRACT:
A method and system is disclosed for determining a property of an object by measuring ultrasonic attenuation. With the proposed method, a measured ultrasonic interaction signal of the object is compared with a reference signal produced using the same generation and detection setup, but using a reference part. The reference ultrasonic signal has low attenuation, and exhibits equivalent diffraction properties as the object, with respect to a broadband ultrasonic pulse. The difference is attributable to the attenuation of the object. The attenuation as a function of frequency, the attenuation spectrum, is fitted to a model to obtain a parameter useful for identifying one of the many properties of an object that varies with ultrasonic attenuation.
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Kruger Silvio E.
Lamouche Guy
Levesque Daniel
Monchalin Jean-Pierre
Anderson J. Wayne
Koenig Hans
Miller Rose M
National Research Council of Canada
Williams Hezron
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