Fluid dynamic angular rate sensor

Details Fluid dynamic angular rate sensor Fluid dynamic angular rate sensor

1979-01-12

1981-03-10

Ruehl, Charles A.

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

73204, G01P 1500

Patent

active

042546591

ABSTRACT:
An angular rate of change sensing device of the type wherein angular rate of change, movement, or velocity is indicated by sensing a differential fluid velocity relative to a sensing apparatus in an underdeveloped laminar fluid flow field and is characterized primarily in that under conditions of no angular movement, there exists a constant or flat fluid velocity and density profile in a plane normal to the longitudinal axis of the flow channel. The device consists of a fluid flow inlet conditioner, a contoured inlet nozzle, a straight or slightly diffusing flow channel, a flow sensing apparatus inside the channel, and a device for pumping fluid through the flow conditioner and channel. Under conditions of angular rotation the velocity profile of a constant velocity, laminar fluid flow field relative to a sensing apparatus, is distorted due to fluid dynamic inertial effects and due to the effects of a relative velocity differential between sensing elements. Sensing apparatus positioned inside the fluid flow channel responds to a differential fluid velocity and yields output signals proportional to an induced angular movement in a plane which includes the differential sensors and the longitudinal axis of the flow channel.

REFERENCES:
patent: 3500690 (1970-03-01), Schuemann
patent: 3500691 (1970-03-01), Moore
patent: 3548637 (1970-12-01), Wicks
patent: 4020699 (1977-05-01), Schaffer

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