Strain gage sensor with integral temperature signal

Details Strain gage sensor with integral temperature signal Strain gage sensor with integral temperature signal

G - Physics

01

L

G01L 9/04 (2006.01) G01B 7/16 (2006.01) G01L 1/22 (2006.01) G01L 19/04 (2006.01)

Patent

CA 2160455

A strain gage pressure sensor (12) having a resistive bridge circuit (76,78,80,82) from which is measured both the applied pressure and the temperature of the pressure sensor (12). A constant voltage (VBRIDGE) is provided across the bridge circuit (76,78,80,82) such that any temperature caused changes in the resistance of the bridge circuit (76,78,80,82) are reflected in the flow of a bridge current (IBRIDGE) through the bridge circuit (76,78,80,82). A sense resistor (36) is electrically coupled to the bridge circuit (76,78,80,82) such that any change in the bridge current (IBRIDGE) causes a change in the voltage drop across the sense resistor (36). The voltage drop and the pressure output signal are digitized and suitably processed resulting in a highly accurate, corrected pressure output for use with suitable pressure instrumentation.

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