Pressure transducer

Details Pressure transducer Pressure transducer

1977-09-08

1980-06-10

Albritton, C. L.

Electrical resistors

Strain gauge type

Fluid- or gas pressure-actuated

338 36, G01L 122

Patent

active

042075513

ABSTRACT:
A pressure transducer incorporates a tubular body symmetrical in two transverse directions, and two pairs of diametrically opposed active strain gages secured to a single surface of the body at equally spaced locations which maintain mechanical and electrical two-fold symmetry, oriented to respond to transverse tangential bending strain in the wall of the tubular body. The four strain gages are connected in a four-legged bridge circuit, which produces a large amplitude linear output signal which is compensated for first and second order errors, without hysteresis. The transducer has a very large safety factor against rupture and may be used in line with a conduit without impeding fluid flow. It is usable for all pressure ranges down to cryogenic temperatures, and may be welded in place with no seals as part of a conduit. It is highly sensitive, with improved resolution.

REFERENCES:
patent: 2420148 (1947-05-01), Ostergren
patent: 3046788 (1962-07-01), Laimins
patent: 3479739 (1969-11-01), Stedman
patent: 3527099 (1970-09-01), Herceg
patent: 3772628 (1973-11-01), Underwood et al.

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