Rotation sensor using linear accelerometers

Details Rotation sensor using linear accelerometers Rotation sensor using linear accelerometers

G - Physics

01

P

G01P 13/04 (2006.01) G01P 3/44 (2006.01) G01P 7/00 (2006.01) G01P 15/08 (2006.01)

Patent

CA 2121380

ROTATION SENSOR USING LINEAR ACCELEROMETERS ABSTRACT OF THE DISCLOSURE Two linear accelerometers (14,16) are spaced from each other by a fixed distance (.DELTA.) along a linear axis (18) which is integrally rotatable with the body of a motor vehicle (12) or other object whose rotation is to be sensed. The accelerometers (14,16) have sensing axes (20,22) which are collinear with the linear axis (18). A computer (24) computes the rotation of the vehicle (12) in terms of angular velocity (.omega.) as a function of the differ- ence between linear accelerations (a1,a2) sensed by the sensors (14,16) and the distance (.DELTA.) between them. Alternatively, the sensing axes (20,22) can be perpendicu- lar to the linear axis (18), and the computer (24) computes the rotation of the vehicle (12) in terms of angular acceleration (.alpha.) as another function of the difference between the linear accelerations (a1,a2) and the distance (.DELTA.). The sensed rotation is independent of the location of the axis (26) about which the vehicle (12) rotates, the radius of rotation, and translational movement of the vehicle (12).

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