Accelerometer

Details Accelerometer Accelerometer

1980-05-30

1982-06-22

Gill, James J.

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

G01P 1513

Patent

active

043356117

ABSTRACT:
An accelerometer comprises an electric coil pivotally mounted in a magnetic field about an axis extending perpendicular to the field for oscillatory movement substantially perpendicular to the field, in the manner of a D'Arsonval movement. Switching means in the form of a radition source and detector responds to movement of the coil assembly when on either side of a switching position to apply a constant current to the coil to move it in the direction of the switching position, thereby setting up an oscillation of the coil. Linear acceleration is measured by having an inertial mass, such as provided by mounting the coil away from its center of mass, displaced from the pivotal axis. An acceleration force acting on the mass of the oscillating coil alters the proportion of time spent at each side of the switching position to give an average current flow in the coil related to the magnitude of acceleration. More than one coil may be provided to measure acceleration along a number of axes.

REFERENCES:
patent: 2940306 (1960-06-01), Lozier
patent: 2946226 (1960-07-01), Wendt et al.
patent: 2979960 (1961-04-01), Johnson
patent: 3062059 (1962-11-01), Singleton
patent: 3295378 (1967-01-01), Hirtreiter
patent: 3459053 (1969-08-01), Grimme et al.
patent: 3494204 (1970-02-01), Whitehead

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