Electrical resistors – Strain gauge type – Fluid- or gas pressure-actuated
Patent
1988-11-29
1990-02-20
Walberg, Teresa J.
Electrical resistors
Strain gauge type
Fluid- or gas pressure-actuated
338 5, G01L 122
Patent
active
049030000
ABSTRACT:
The invention relates to a pressure sensor including a metallic housing having an open end with an opening, a ceramic diaphragm accommodated within the housing such that the diaphragm is exposed at its one major surface to a pressure of a fluid in an external space through the opening of the housing, and resistors formed integrally on the diaphragm. The electrical resistance of the resistors varies with the pressure acting on the ceramic diaphragm, whereby the pressure is determined by the electrical resistance. An electromagnetic shielding member is disposed within the metallic housing such that the shielding member is positioned between the resistor or resistors and the open end of the metallic housing. The shielding member is adapted to protect the resistors from an electromagnetic wave in the external space.
REFERENCES:
patent: 2599578 (1952-06-01), Obert et al.
patent: 4204244 (1980-05-01), Ho
patent: 4217783 (1980-08-01), Ito et al.
patent: 4311980 (1982-01-01), Prudenziati
patent: 4481497 (1984-11-01), Kurtz et al.
"Characteristics and Performances of Thick Film Pressure Sensors for Automotive Applications", Roberto Dell'Acqua et al., pp. 69-75.
"High Pressure Thick Film Monolithic Sensors", Roberto Dell'Acqua et al., pp. 79-87.
Mase Syunzo
Yajima Yasuhito
Lateff M. M.
NGK Insulators Ltd.
Walberg Teresa J.
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