Measuring and testing – Vibration – By mechanical waves
Patent
1980-02-05
1982-04-06
Kreitman, Stephen A.
Measuring and testing
Vibration
By mechanical waves
73607, 128660, G01N 2904
Patent
active
043229743
ABSTRACT:
An ultrasound scanner for scanning a medium for anomalies scattering acoustic waves, having ultrasonic transducing means positioned within scanning range of the medium; ultrasonic transmitting means coupled to the transducing means for providing a train of pulsed ultrasonic carrier signals. Each pulsed carrier signal of the train has a constant and unique frequency, the train of pulsed carrier signals together covering a range of frequencies. The transducing means is oriented to propagate the train along a path through the medium. The device further includes (a) means for repeatedly repositioning the transducing means for propagating further trains along a plurality of different paths through the medium, the plurality of different paths together defining a planar cross-section; (b) means coupled to the transducing means and responsive to the steady state phase and amplitude of the received signal to thereby define the total scatter characteristic within the planar cross-section; (c) means for calculating from the characteristic plurality of point characteristics of the acoustic property corresponding to the scatter characteristic; and (d) means for comparing each of the point characteristics with respect to one another for the anomalies.
REFERENCES:
patent: 3156110 (1964-11-01), Clynes
patent: 3756071 (1973-09-01), Dory
patent: 3805596 (1974-04-01), Klahr
patent: 4105018 (1978-08-01), Greenleaf et al.
patent: 4174635 (1979-11-01), Oldendorf
Abele Manlio
Chase Norman E.
Passalaqua Anthony M.
Kreitman Stephen A.
New York University
Rosen Daniel M.
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