Temperature stabilized fluidic angular rate sensor

Details Temperature stabilized fluidic angular rate sensor Temperature stabilized fluidic angular rate sensor

1976-02-05

1977-05-03

Gill, James J.

Measuring and testing

Speed, velocity, or acceleration

Temperature compensator

73516LM, G01P 1508

Patent

active

040206998

ABSTRACT:
The measurement bridge of a fluidic angular rate sensor in which a pair of temperature sensitive resistive elements are differentially cooled by a jet of fluid, the direction of which lags the position of the resistive elements when the rate sensor is rotated in the plane of sensitivity, is driven by a constant voltage source through resistances substantially equal to the rate sensing resistive elements so that as the resistive elements increase in resistance with temperature, the voltage also increases, so the power consumption and therefore the heat generated in the resistive elements remains constant, thereby tending to maintain a constant temperature differential of the resistive elements above the ambient, and in turn reducing changes in thermally-induced mechanical stress and resulting motion; further, lack of tracking between the two resistive sensing elements over wide temperature ranges is compensated by coupling some of the resultant temperature-dependent voltage to a bridge node to compensate for the temperature-dependent mismatch, said voltage being nulled at normal temperature by coupling of fixed voltage of opposite polarity to the same node.

REFERENCES:
patent: 3587328 (1971-06-01), Schuemann
patent: 3631729 (1972-01-01), Moore

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