Fluid pressure sensor with temperature indication

Details Fluid pressure sensor with temperature indication Fluid pressure sensor with temperature indication

1985-04-16

1987-04-21

Frankfort, Charles

Thermal measuring and testing

Temperature measurement

Combined with diverse art device

73714, 73727, G01K 720, G01L 906

Patent

active

046592350

ABSTRACT:
A pressure sensor is provided by a bridge circuit on a semiconductor diaphragm, with diaphragm deflection being effective to produce an output voltage proportional to the deflecting force. A constant current source is coupled to the energizing terminals of the bridge circuit. By measuring the voltage drop across the semiconductor bridge during operation, an output signal indicative of bridge temperature is obtained. Accordingly two output signals, pressure and temperature, are derived from a single bridge sensor. This produces a compact, accurate transducer assembly for use in an automotive control system, providing two control signals from a single sensor structure.

REFERENCES:
patent: 3354716 (1967-11-01), Wiebe et al.
patent: 3967188 (1976-06-01), Spencer
patent: 4190796 (1980-02-01), Ishii
patent: 4262532 (1981-04-01), Butler et al.
patent: 4300395 (1981-11-01), Shirouzu et al.
patent: 4366714 (1983-01-01), Adorni
patent: 4414853 (1983-11-01), Bryzek
patent: 4554927 (1985-11-01), Fussell
patent: 4558238 (1985-12-01), Yamada et al.
patent: 4565097 (1986-01-01), Dimeff

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