Nondestructive testing of gears

Details Nondestructive testing of gears Nondestructive testing of gears

1988-01-29

1989-10-10

Yasich, Daniel M.

Measuring and testing

Toothed gear

3644241, 364575, G01M 1302, G06F 0702

Patent

active

048723371

ABSTRACT:
A gear evaluation system which includes means for measuring gear rotational speed and gear case vibrational displacement associated with gear mesh action. A signal is displacement associated with gear mesh action. A signal is developed that represents the time series average signal synchronized to the relevant gear shaft speed. This signal is passed through a bandpass filter set to pass a signal at the gear mesh frequency (for the particular gear under evaluation). After rectification the output signal provides information relating to average vibrational levels associated with gear mesh action and deviations from the average levels.

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patent: 3712130 (1973-01-01), Weichbrodt et al.
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patent: 4305132 (1981-12-01), Tsuboshima et al.
patent: 4380048 (1983-04-01), Kishi et al.
patent: 4649743 (1987-03-01), Sugimoto et al.
patent: 4684922 (1987-08-01), Minogue
"Laser Vibration Depot Inspection of Gear Boxes", SAE Paper No. 870,400, Feb. 23-27, 1987, Robert J. Watts et al., 16 pages.

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