Planar inertial sensor

Details Planar inertial sensor Planar inertial sensor

G - Physics

01

P

79/17, 73/42

G01P 15/02 (2006.01) G01C 19/56 (2006.01) G01P 15/08 (2006.01) G01P 15/097 (2006.01)

Patent

CA 1227059

ABSTRACT A planar inertial sensor includes a sheet member having one inner planar element adapted for limited angular motion about a (Y) axis perpendicular to an input (Z) axis. In a gyroscope form, the inner planar element is also adpated for limited angu- lar motion about an (X) axis normal to and intersecting with the Y axis. The gyroscope form includes an outer driving planar ele- ment which is continuously driven in an oscillatory manner in limited excursions about the Y axis. The driving element is coupled to the inner element so that oscillatory motion of the driving element is coupled to the inner element. Position sen- sors provide signals representative of the angular position of the inner element relative to the X axis, which in turn are representative of angular rates impressed on the sensor about the input (Z) axis which is orthogonal to the X and Y axes. In an accelerometer form, the inner planar element is characterized by a mass imbalanace across the Y axis. Positon sensors provide signals representative of the angular position of the inner ele- ment, which in turn are representative of the acceleration of the sensor in the direction of the input (Z) axis.

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