Method and apparatus for measuring vibrations of rotating shaft

Details Method and apparatus for measuring vibrations of rotating shaft Method and apparatus for measuring vibrations of rotating shaft

1992-05-29

1994-03-08

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73655, G01D 534

Patent

active

052930408

ABSTRACT:
The vibration measuring apparatus of a rotating shaft is made up of a pair of projection groups provided radial directions of the shaft with spacings therebetween and having the same height, a source of measuring light for irradiating the projection groups, a light receiving element for receiving the measuring light reflected by the projection groups, and a calculating device for calculating a peripheral speed difference between the two projection groups spaced in the axial direction of the rotating shaft.

REFERENCES:
patent: 4060329 (1977-11-01), Ellis
patent: 4080823 (1978-03-01), Stargardter
patent: 4086808 (1978-05-01), Camac et al.
patent: 4751382 (1988-06-01), Reifel et al.
Nishi et al., "Complementary 2 dimensional laser Doppler velocimeter with an optical fiber probe," SPIE vol. 1267 Fiber Optic Sensors IV, 1990, pp. 257-263.

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