Temperature compensated vibrating cylinder pressure transducer

Details Temperature compensated vibrating cylinder pressure transducer Temperature compensated vibrating cylinder pressure transducer

1977-06-17

1978-07-25

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Vibration type

73708, G01L 1904

Patent

active

041022092

ABSTRACT:
A pair of annular rings for a vibrating cylinder pressure transducer are fabricated from material with a high permeability and are disposed on the sidewall of a vibrating cylinder to reduce the effective reluctance of each of the magnetic paths of the drive and pickup coils at high temperature. A thin ring of material is deposited to extend circumferentially around the interior of the cylinder sidewall adjacent the axis of both the drive and pickup coils. In operation, as the temperature of the vibrating cylinder increases causing its permeability to decrease, the rings compensate for the increasing sidewall reluctance maintaining effective reluctance to the drive and pickup coils adequately low so that a signal of a sufficient magnitude is fed back to the drive coil to maintain the system in a self-oscillating condition.

REFERENCES:
patent: 3021711 (1962-02-01), Arvidson
patent: 3199355 (1965-08-01), Simon-Suisse

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