Vibration transducer

Details Vibration transducer Vibration transducer

1981-06-01

1984-05-08

Kreitman, Stephen A.

Measuring and testing

Vibration

Sensing apparatus

336134, G01H 1100

Patent

active

044467419

ABSTRACT:
A vibration transducer for measuring vibrations and shocks, especially vibrations which occur during the operation of machines and mechanical equipment. The induction vibration transducer comprises a permanent magnet movably mounted with respect to at least one induction coil. The movable magnet is provided in the axial cavity of a bushing having disc-like permanent magnets at its opposite ends, the movable magnet being repelled by the fixed permanent magnets. Around the bushing between the axially inner pole pieces of the fixed permanent magnets and the ends of the movable permanent magnet there are pseudobifilar wound induction coils. One or both of the confronting surfaces of the bushing and the movable permanent magnet is provided with an anti-friction covering or coating. The vibration transducer of the invention has relatively small dimensions, withstands moderately high temperature, and is virtually unaffected by temperature changes.

REFERENCES:
patent: 2852243 (1958-09-01), Shepard, Sr.
patent: 3100292 (1963-08-01), Warner, Jr. et al.
patent: 3129347 (1964-04-01), Tognola
patent: 3308647 (1967-03-01), Crawford
patent: 3483759 (1969-12-01), Venetos et al.

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