Method of measuring pressures using a tuning fork crystal oscill

Details Method of measuring pressures using a tuning fork crystal oscill Method of measuring pressures using a tuning fork crystal oscill

1991-08-09

1993-07-20

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Vibration type

73708, G01L 1100

Patent

active

052283445

ABSTRACT:
A pressure is measured by obtaining a difference between an actual resonance resistance of a tuning fork oscillator subjected to the pressure and a natural resonance resistance of the tuning fork oscillator, and then applying the difference to a predetermined relation to obtain a measurement of the pressure. Variations in the natural resonance resistance of the tuning fork oscillator due to temperature variations of the tuning fork oscillator are compensated for by measuring a resonance frequency of the tuning fork oscillator and then determining the natural resonance resistance of the tuning fork oscillator from the resonance frequency based on a predetermined relation between the resonance frequency and the natural resonance resistance of the tuning fork oscillator. The resonance frequency of the tuning fork oscillator is indicative of the temperature of the tuning fork oscillator.

REFERENCES:
patent: 4995263 (1991-02-01), Stocker
patent: 4995264 (1991-02-01), Stocker et al.
patent: 4995265 (1991-02-01), Stocker

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