Pressure sensor utilizing a magnetostriction effect

Details Pressure sensor utilizing a magnetostriction effect Pressure sensor utilizing a magnetostriction effect

1991-04-01

1992-11-24

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

73DIG2, 336 30, G01L 916

Patent

active

051652846

ABSTRACT:
A pressure sensor has a recess formed in outer surfaces of a deforming part and a non-deforming part such that a pair of steps are formed at opposite ends of the recess. The deforming part is strained by a pressure whereas the non-deforming part is not strained by the pressure. An amorphous magnetic alloy film is received in and affixed relative to the recess, and extends between the pair of steps. The depth of the recess is larger than the thickness of the film. A pair of permeability detector elements are mounted respectively on the deforming part and the non-deforming part so as to detect a change in permeability of the film.

REFERENCES:
patent: 3197722 (1965-07-01), Chass
patent: 4938069 (1990-07-01), Shoji et al.

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