Multimodulus pressure sensor

Details Multimodulus pressure sensor Multimodulus pressure sensor

1988-12-23

1990-07-31

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

73706, 73724, 73726, 338 4, 361283, G01L 708, G01L 904, G01L 912

Patent

active

049441876

ABSTRACT:
A pressure sensor utilizes the effect of different elastic moduli between layers or sections of different material that are bonded together to form a body, so that when the bonded material unit is subjected to a uniform hydrostatic external pressure, the differences in the elastic moduli of each of the materials will cause the materials to deflect in a predictable manner proportional to pressure. The amount of warpage or deflection of the body of material can be measured as a function of pressure. Specifically, two layers of materials, such as silicon and borosilicate glass, which have substantially different elastic moduli can be bonded across an interface surface to form an assembly, and when subjected to a substantially uniform pressure on the exterior surfaces the assembly will deflect for indicating applied pressure at relatively high pressure ranges. The bonded material assembly is placed in a fluid to provide a substantially uniform applied hydrostatic pressure on all exposed surfaces of the bonded material assembly.

REFERENCES:
patent: 2162308 (1939-06-01), Jenny
patent: 2177564 (1939-10-01), Havill
patent: 2179417 (1939-11-01), Maxham
patent: 2472214 (1949-06-01), Hurvitz
patent: 3142917 (1964-08-01), Spender
patent: 3859575 (1975-01-01), Lee
patent: 4507973 (1985-04-01), Barr
patent: 4682500 (1987-07-01), Uda
The Physics of High Pressure, P. W. Bridgman, Ph. D., 1931, pp. 149-166, 385-393.

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