Method and apparatus for the determination of the mass of an imp

Details Method and apparatus for the determination of the mass of an imp Method and apparatus for the determination of the mass of an imp

1979-07-13

1981-08-25

Swisher, S. Clement

Measuring and testing

Vibration

Loose object detection

73579, 73659, G01H 1300, G01M 700

Patent

active

042852412

ABSTRACT:
The impact signal derived from an acoustic transducer has a unique signature represented by its frequency spectrum. The present invention generates under predetermined conditions with objects, each of definite weight and form, a series of impact signals for reference purposes and correlates an actual impact signal from an unknown impacting object with such reference impact signals by comparing the frequency spectra, thereby to indirectly recognize the impacting object.

REFERENCES:
patent: 3554012 (1971-01-01), Schoel
patent: 3860481 (1975-01-01), Gopal
patent: 3901090 (1975-08-01), Akey et al.
patent: 4184205 (1980-01-01), Morrow

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