Inductive differential pressure sensor

Details Inductive differential pressure sensor Inductive differential pressure sensor

1984-11-23

1987-05-19

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

With protective separator

73708, 73722, 336 30, G01L 708, G01L 910

Patent

active

046657533

ABSTRACT:
A measuring diaphragm (1) separates in a pressure-tight manner two half chambers (9, 10) suitable for being respectively subjected to two pressures to be compared. In a central zone of the diaphragm (1) there are two magnetic cores (118, 127) which are disposed on opposite sides of the diaphragm in respective ones of the half chambers and which are displaced with the diaphragm when the faces of the diaphragm are subjected to different pressures. The cores are movable inside respective simple inductors (132, 133 ), thereby varying their impedances. By measuring this impedance variation it is possible to determine the position of the cores in the associated inductors, and consequently to establish the difference between the pressures being applied to respective faces of the measuring diaphragm (1). The above arrangement provides for automatic zero correction in an inductive differential pressure sensor.

REFERENCES:
patent: 2692501 (1954-10-01), Erwood
patent: 4538465 (1985-09-01), Bianchi et al.

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