Fluid pressure sensor

Details Fluid pressure sensor Fluid pressure sensor

1986-07-07

1987-09-29

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

73DIG2, 336 20, 336 30, G01L 708, G01L 916

Patent

active

046961925

ABSTRACT:
A fluid pressure sensor includes a body made of a soft magnetic material with a groove formed therein, and a coil is installed in the body in the groove. One magnetostrictive disc is placed on the body over the groove, and two non-magnetic discs are placed over the magnetostrictive disc. A casing is provided for accommodating the body carrying the coil, the magnetostrictive disc, and the non-magnetic discs, and it is closed by a lid member which has a surface for receiving a fluid pressure. A plurality of through holes are formed in the lid member within the fluid pressure receiving surface such that the through holes extend to the non-magnetic disc at position over the groove, whereby the magnetostrictive plate is partially distorted by the fluid pressure.

REFERENCES:
patent: 4412454 (1983-11-01), Yamashita et al.
patent: 4625562 (1986-12-01), Yamashita et al.

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