Tri-axial accelerometers

Details Tri-axial accelerometers Tri-axial accelerometers

1988-12-05

1990-07-17

Chapman, John

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

73517R, G01P 1513

Patent

active

049413546

ABSTRACT:
An accelerometer has a moving magnet within a housing. The magnet is mounted within a support member connected to the center of a diaphragm so as to permit movement of the magnet along a measurement axis extending in the axial direction of the support member by deformation of the diaphragm and so as to permit movement of the magnet along two mutually orthogonal measurement axes parallel to the diaphragm by flexing of the diaphragm to allow for pivoting of the support member. Furthermore displacement of the magnet with respect to the three mutually transverse measurement axes in response to an applied force is sensed by a pickoff capacitor, and a respective output signal proportional to the component of the applied force along each of the measurement axes is supplied by associated sensing circuitry. Simultaneously the magnet is restored to its null position by associated force coil pairs. The use of a single magnet for measurement along the three axes renders the accelerometer of high accuracy and decreases the size of the measurement assembly.

REFERENCES:
patent: 4397185 (1983-08-01), Craig et al.
patent: 4398418 (1983-08-01), Shutt et al.
patent: 4584885 (1986-04-01), Cadwell

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