G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 29/12 (2006.01)
Patent
CA 2069097
PCT/US91/06703 ABSTRACT A resonant ultrasound spectroscopy method provides a unique characterization of an object (10) 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 (14) and detection (16) 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 than characterized in a manner effective to form a unique signature of the object. In one characterization, a small frequency interval is defined and stepped through 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.
Finlayson & Singlehurst
Government Of The United States Of America As Represented By The
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