Pressure transducer with stress isolation for hard mounting

Details Pressure transducer with stress isolation for hard mounting Pressure transducer with stress isolation for hard mounting

1986-06-23

1989-01-31

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Diaphragm

73729, 338 4, 338 41, 338 42, G01L 708, G01L 710, G01L 906

Patent

active

048007587

ABSTRACT:
A pressure transducer has a stress isolator layer which permits the sensor to be non-resiliently mounted (hard mounted) to a mounting surface that in turn is subjected to strain. The strain of the mounting surface tends to induce undesired stress in the sensing diaphragm, and the present stress isolator layer minimizes the amount of stress that is transferred to the measuring diaphragm, to thereby reduce error. The spring preferably comprises a silicon leaf0type spring, with or without isolating slots, and is used in various combinations of diaphragms that are sensitive to pressure. The deflection of the diaphragm in response to pressure can be measured in any desired known manner such as with strain gage resistors, or through capacitive sensing.

REFERENCES:
patent: 3390579 (1968-07-01), Glattenberg et al.
patent: 4021766 (1977-05-01), Aine
patent: 4085620 (1978-04-01), Tanaka
patent: 4168630 (1979-09-01), Shirouzu et al.
patent: 4295115 (1981-10-01), Takahashi et al.
patent: 4389895 (1983-06-01), Rud, Jr.
patent: 4454440 (1984-06-01), Cullen
patent: 4527428 (1985-07-01), Shimada et al.
patent: 4536820 (1985-08-01), Binder et al.
patent: 4563697 (1986-01-01), Miura
patent: 4563903 (1986-01-01), Kohnlechner et al.
patent: 4576049 (1986-03-01), Kohnlechner

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