Arrangement for measuring the pressure in cylindrical cavities

Details Arrangement for measuring the pressure in cylindrical cavities Arrangement for measuring the pressure in cylindrical cavities

1981-09-30

1983-12-20

Swisher, S. Clement

Measuring and testing

Fluid pressure gauge

Diaphragm

73726, 73119A, 73708, G01L 704

Patent

active

044209800

ABSTRACT:
An arrangement for measuring the pressure in a cylindrical cavity by measuring the expansion of the cylindrical cavity in the circumferential direction which results from the pressure within the cylindrical cavity. Such circumferential elongations are measured by a first electrical transducer which is responsive to elongations in the circumferential direction. Contractions in the circumferential direction which results from elongations in the longitudinal direction of the cylindrical cavity are compensated by measuring such longitudinal elongations with at least one further electrical transducer. Such longitudinal elongations may result from bending or tensile stresses. The sensitivity of the electrical transducer for measuring the longitudinal elongations corresponds to the sensitivity of the electrical transducer which measures circumferential elongations, multiplied by the reciprocal of the Poisson ratio. The electrical transducers are connected in series with one another, and in one embodiment, may be formed of wire strain gauges.

REFERENCES:
patent: 2420148 (1947-05-01), Ostergren
patent: 2747408 (1956-05-01), Boytim et al.
patent: 2814946 (1957-12-01), Harris, Jr.
patent: 3164014 (1965-01-01), Redner
patent: 3261204 (1966-07-01), Jacobson
patent: 3937087 (1976-02-01), Heggie
patent: 3938379 (1976-02-01), Bingham
patent: 4216403 (1980-08-01), Krempl et al.
patent: 4359498 (1982-11-01), Mallon et al.

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