Digital pressure-measuring device

Details Digital pressure-measuring device Digital pressure-measuring device

1981-03-09

1983-07-19

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Null balance type

73705, 73717, G01L 900

Patent

active

043937136

ABSTRACT:
The pressure-measuring device comprises a first chamber subjected to the pressure to be measured and a second chamber connected to the first through an opening fitted with a valve. The device further comprises a valve-control circuit and an element for detecting the instants at which the pressure difference between the two chambers attains a predetermined increment or decrement or a zero value. The detection element consists of a deformable pressure-tight wall placed between the two chambers and adapted to produce action on an optoelectronic, piezoelectric or electromechanical element which converts the deformation directly to logical signals. A bidirectional counter is provided for forward or backward counting of the increments and decrements obtained.

REFERENCES:
patent: 3397581 (1968-08-01), Bush

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