Magnetically shielded apparatus for sensing vibration

Details Magnetically shielded apparatus for sensing vibration Magnetically shielded apparatus for sensing vibration

1991-01-30

1992-11-10

Wieder, Kenneth A.

Measuring and testing

Vibration

Sensing apparatus

336 84M, 32420722, 32420726, 324236, 324262, G01H 1102, G01B 714, G01N 2772

Patent

active

051614146

ABSTRACT:
A vibration detector for sensing imbalance of a part in a balancing machine uses an eddy current proximity detector for sensing vibration movement of a portion of the machine. To prevent spurious signals due to magnetic fields varying at the part rotation frequency, a mu-metal can is secured to the vibrating portion of the machine, an electrically conductive coupon is attached inside the can for vibrating movement therewith, and the proximity detector is spaced from the coupon by a small gap for producing AC signals representing the vibration amplitude.

REFERENCES:
patent: 3510852 (1970-05-01), Flanagan
patent: 3609527 (1971-09-01), Ellis
patent: 3707671 (1972-12-01), Morrow et al.
patent: 4384252 (1983-05-01), Kolter
patent: 4479389 (1984-10-01), Anderson, III et al.
patent: 4866380 (1980-09-01), Meins et al.

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