Method and means for detecting faults or defects in moving machi

Details Method and means for detecting faults or defects in moving machi Method and means for detecting faults or defects in moving machi

1986-11-26

1988-09-06

Levy, Stewart J.

Measuring and testing

Vibration

By mechanical waves

340682, G01H 100, G01M 1304

Patent

active

047683805

ABSTRACT:
A method for detecting faults or defects in moving machine parts wherein mechanical vibrations produced by a fault or defect are converted into an electrical signal from which the condition of the machine part is obtained. For converting the mechanical vibrations into an electrical signal, an acoustic-emission transducer with wide bandwidth is used. A frequency range in the electrical signal is selected where the half wavelength is smaller than the smallest linear dimension of the cross section of the transducer face which is in contact with the machine part.

REFERENCES:
patent: 4088907 (1978-05-01), Jones et al.
patent: 4592034 (1986-05-01), Sachse et al.
R. C. McMaster, Nondestructive Testing Handbook (1982) pp. 630-631.
Maksimov, V. P., Karasev, V. A., Solorer, B. P., "Flaw Detector for Rotating Parts," (21.10.71) Bul. 25/19.8.71.

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