Pressure sensor having baffling means

Details Pressure sensor having baffling means Pressure sensor having baffling means

1988-11-07

1990-05-01

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

With protective separator

73727, 73756, 338 4, G01L 708, G01L 906

Patent

active

049208055

ABSTRACT:
The invention relates to a pressure sensor having a ceramic diaphragm which is exposed at one of opposite surfaces thereof to a measurement fluid in an external space and deformable in response to a pressure of the measurement fluid, and a strain detector for producing an electrical output representative of an amount of deformation of the ceramic diaphragm. The ceramic diaphragm is fixedly supported at an outer portion thereof, so that a central working portion of the diaphragm is deformable in response to the pressure of the measurement fluid applied thereto. The sensor includes a baffling structure disposed adjacent the above-indicated one surface of the ceramic diaphragm. The baffling structure has portions which partially define a chamber to which the above-indicated one surface of the ceramic diaphragm is exposed. The baffling structure has at least one communication hole for communication between the chamber and the external space, such that the central working portion of the ceramic diaphragm is protected against direct exposure to a straightforward flow of the measurement fluid from the external space toward the central working portion of the diaphragm.

REFERENCES:
patent: 2486133 (1949-10-01), Egger
patent: 3289134 (1966-11-01), Laimins et al.
patent: 3581773 (1971-06-01), Warren
patent: 4311980 (1982-01-01), Prudenziati
SAE Technical Paper Series, No. 820319.
SAE Paper, No. 860474.

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