Method and apparatus for current regulation and temperature comp

Details Method and apparatus for current regulation and temperature comp Method and apparatus for current regulation and temperature comp

1994-10-27

1997-04-01

O'Shea, Sandra L.

Measuring and testing

Fluid pressure gauge

With pressure and/or temperature compensation

73726, 34087039, 34087016, G01L 1904, G01C 1902

Patent

active

056168462

ABSTRACT:
A temperature compensation circuit is connected to the output of a strain gauge pressure sensor having a wheatstone bridge arrangement. The signal from the wheatstone bridge sensor is amplified and converted by an instrumentation amplifier to produce a load current proportional to the pressure applied to the pressure sensor. The load current indicates the actual pressure applied to the pressure sensor. Constant voltage and current regulators compensate for variations in the load current from the pressure sensor which result from temperature changes.

REFERENCES:
patent: 3854039 (1974-12-01), Serrano
patent: 4071823 (1978-01-01), Okayama
patent: 4096748 (1978-06-01), Pichon
patent: 4840067 (1989-06-01), Nishida et al.
patent: 5069066 (1991-12-01), Djorup
patent: 5076376 (1991-12-01), Bizet et al.
patent: 5163325 (1992-11-01), White et al.
patent: 5163326 (1992-11-01), Frick
patent: 5510779 (1996-04-01), Maltby et al.

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