Distance-frequency transducer

Details Distance-frequency transducer Distance-frequency transducer

1981-03-17

1983-07-12

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

73718, 331 65, 361283, G01L 912, H01G 700

Patent

active

043923836

ABSTRACT:
The distance-frequency transducer includes a capacitor whose capacitance changes as a function of movement of one electrode relative to the other. The movement is controlled by the parameter to be measured, as, for example, the pressure in a pressure pickup. The capacitance determines the frequency of an RC oscillator. The output frequency of the oscillator can be calibrated directly in pressure units.

REFERENCES:
patent: 3808480 (1974-04-01), Johnston
patent: 3883826 (1975-05-01), Kirby
patent: 4158217 (1979-06-01), Bell
patent: 4177680 (1979-12-01), Coleman
patent: 4295376 (1981-10-01), Bell

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