Integrity test for acoustic bearing defect detector

Details Integrity test for acoustic bearing defect detector Integrity test for acoustic bearing defect detector

1990-01-31

1991-07-09

Ng, Jin F.

Measuring and testing

Vibration

Sensing apparatus

381 56, 381 58, 2461695, G01N 2904

Patent

active

050294776

ABSTRACT:
This invention relates to the testing of apparatus used for on-line acoustic detection of bearing defects, particularly in railroad applications. A loudspeaker on each side of the section of track, in response to a microprocessor, generates simulated acoustic signatures characteristics of various bearing defects. The microprocessor additionally sends corresponding simulated train speed signals to the apparatus. The invention monitors the apparatus for the appropriate alarm signal.

REFERENCES:
patent: 3956693 (1976-05-01), Zutrauen et al.
patent: 4454502 (1984-06-01), Fahey et al.
patent: 4649344 (1987-03-01), Moll et al.
patent: 4790190 (1988-12-01), Bambara et al.
patent: 4843885 (1989-07-01), Bambara

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