Fluidic acceleration sensor

Details Fluidic acceleration sensor Fluidic acceleration sensor

1974-12-23

1976-03-16

Gill, James J.

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

G01P 1502

Patent

active

039437760

ABSTRACT:
A fluidic G sensor for monitoring the acceleration or deceleration of a mile includes a hollow cylinder containing an inertial mass, e.g., a piston, which is supported by a diaphragm pressurized by gas. The gas pressure is supplied from an external source and is metered into the diaphragm chamber through a fixed orifice. Gas is discharged from the chamber through two vent orifices, one fixed and the other variable. The fixed vent orifice represents the output load and leads to a fluidic Schmitt Trigger. The variable vent orifice is modulated by diaphragm motion and serves to control the pressure under the diaphragm as a function of acceleration of the piston. A dashpot formed between the piston and the upper closed end of the cylinder, which contains a small orifice open to ambient pressure, is employed to damp the oscillation of the piston and thereby stabilize the output pressure.

REFERENCES:
patent: 2958137 (1960-11-01), Mueller
patent: 2966802 (1961-01-01), Steen
patent: 3091971 (1963-06-01), Stedman
patent: 3104552 (1963-09-01), Bouchard
patent: 3221562 (1965-12-01), Borcher et al.
patent: 3501946 (1970-03-01), Riordan et al.
patent: 3509774 (1970-05-01), Evans

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