Resonant ultrasound spectroscopy
First Claim
1. A method for characterizing an object by resonant ultrasound spectroscopy, comprising the steps of:
- applying to said object acoustic waves having frequencies swept over a predetermined frequency range;
detecting a response of said object to said acoustic waves;
determining the frequency of each resonant response peak in said predetermined frequency range; and
forming a unique signature of said object from a density distribution of said resonant response frequencies.
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Accused Products
Abstract
A resonant ultrasound spectroscopy method provides a unique characterization of an object for use in distinguishing similar objects having physical differences greater than a predetermined tolerance. A resonant response spectrum is obtained for a reference object by placing excitation and detection transducers at any accessible location on the object. The spectrum is analyzed to determine the number of resonant response peaks in a predetermined frequency interval. The distribution of the resonance frequencies is then characterized in a manner effective to form a unique signature of the object. In one characterization, a small frequency interval is defined and stepped though the spectrum frequency range. Subsequent objects are similarly characterized where the characterizations serve as signatures effective to distinguish objects that differ from the reference object by more than the predetermined tolerance.
73 Citations
6 Claims
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1. A method for characterizing an object by resonant ultrasound spectroscopy, comprising the steps of:
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applying to said object acoustic waves having frequencies swept over a predetermined frequency range; detecting a response of said object to said acoustic waves; determining the frequency of each resonant response peak in said predetermined frequency range; and forming a unique signature of said object from a density distribution of said resonant response frequencies. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification