Apparatus for the determination of unbalance in rotating bodies

Details Apparatus for the determination of unbalance in rotating bodies Apparatus for the determination of unbalance in rotating bodies

1975-06-12

1977-11-29

Gill, James J.

Measuring and testing

Rotor unbalance

Dynamic

G01M 122

Patent

active

040600025

ABSTRACT:
A balancing system for the determination of unbalance in rotating bodies in which noise problems are reduced by the formation of average values of the vibration signals generated by the rotating bodies, each average value corresponding to each of a number of angular positions of the rotating body. Transducers are used to convert the mechanical vibration of a rotating body to an electrical signal which is then periodically sampled with the value of the sample being stored in a memory cell. The samples for each revolution are then used to form either an average value or an exponential average value. The average values so obtained have a relatively high signal to noise ratio.

REFERENCES:
patent: 3087487 (1963-04-01), Clynes
patent: 3147624 (1964-09-01), Trimble
patent: 3297860 (1967-01-01), Weiss
patent: 3681978 (1972-08-01), Mathias et al.
patent: 3699806 (1972-10-01), Weichbrodt
"Electronic Measurements Using Statistical Techniques", by S. L. Silver from Electronics World, June, 1968, pp. 49-53.

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