Process and device for detecting defects in moving parts having

Details Process and device for detecting defects in moving parts having Process and device for detecting defects in moving parts having

1989-06-14

1992-01-28

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

73660, 73593, G01H 100, G01M 1304

Patent

active

050834622

ABSTRACT:
An apparatus and method for detecting defects in moving parts having a central rotating shaft, in particular shaft bearings, with the aid of an acoustic-electric transducer converting the mechanical acoustic vibrations received into electric signals to be processed in a signal processing circuit to signals indicative of the status of the parts, the improvement wherein the acoustic-electric transducer is centrally disposed on one end of the shaft so that it rotates therewith and receives vibrations therefrom, and wherein the acoustic-electric transducer comprises a piezoelectric element, and an amplifier having its control terminal coupled to the pass filter.

REFERENCES:
patent: 3930405 (1976-01-01), Renken, Jr.
patent: 4768380 (1988-09-01), Vermeiren et al.

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