Acceleration sensor and a method for its manufacture

Details Acceleration sensor and a method for its manufacture Acceleration sensor and a method for its manufacture

1997-09-08

1999-12-21

Williams, Hezron

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

7386269, G01P 1511

Patent

active

060033746

ABSTRACT:
An acceleration sensor is described which is formed by planar technology on a substrate. It includes a core of ferromagnetic material and, coupled conductively together by the core, a first winding adapted to be connected to a power supply and a second winding adapted to be connected to circuit means for measuring an electrical magnitude induced therein. The core has two suspended portions which are free to bend as a result of an inertial force due to an accelerative movement of the sensor itself. The bending causes lengthening of the core and hence a variation in the reluctance of the magnetic circuit. If a constant current is supplied to the first winding, a voltage is induced in the second winding as a result of the variation in the magnetic flux caused by the variation in reluctance.

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patent: 5142227 (1992-08-01), Fish
patent: 5195377 (1993-03-01), Garshelis
patent: 5723789 (1998-03-01), Shannon

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