Measuring and testing – Vibration – Sensing apparatus
Patent
1993-09-07
1995-11-14
Chilcot, Richard
Measuring and testing
Vibration
Sensing apparatus
73660, G01P 107
Patent
active
054656249
ABSTRACT:
An apparatus for measuring kinematic errors in power transmission mechanisms with an input shaft and an output shaft. The apparatus comprises a pair of laser doppler velocimeters (LDV's) (16,34). Each generates a laser beam split into two equal-intensity parallel beams which are projected so as to strike a shaft while the shaft rotates. The shaft produces reflected beams having a frequency which is shifted from that of the incident beams, thereby producing returning beams which are heterodyne. A measuring (20,38) channel is in communication with each LDV. An attenuator (24) is in communication with one of the measuring channels (20) for decreasing the amplitude of a signal generated by the measuring channel (20). A summing and integrating amplifier (28) is connected to the attenuator, the amplifier generating a signal indicative of kinematic error in the gear mechanism.
REFERENCES:
patent: 4551017 (1985-11-01), Mannava et al.
patent: 4601580 (1986-07-01), Hallowell
patent: 5144840 (1992-09-01), Whipple, III
patent: 5365787 (1994-11-01), Hernandez et al.
"Measurement of Gear Transmission Error Using Laser Velocimeters", Kato et al., Proceedings of the International Conference on Motion and Power Transmissions, Hiroshima, Japan, Nov. 23-26, 1991, pp. 225-229.
Product Data Information Sheet of Bruel & Kjaer, "Torsional Vibraton Meter--Type 2523", 4 pages.
Brasile Francis J.
Tseytlin Alexander S.
Chilcot Richard
Ford Motor Company
Malleck Joseph W.
May Roger L.
Noori Max
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