Patent ID: 6282961
Filing Date: 2001-09-04
Classification: G01P

Abstract:
A rotary accelerometer comprising:a nonrotatable cylindrical magnetic return path formed out of magnetic permeable material;one or more permanent magnets, with two opposite magnetic poles, disposed around the magnetic return path;an electrically conductive cup with an axis for rotation there around, the cup surrounding the permanent magnets and the permanent magnets are arranged so as to produce a magnetic field through the cup into the nonrotatable cylindrical magnetic return path thereby inducing eddy currents inside the cup when rotating in the magnetic field;a stator core formed out of magnetic permeable material surrounding the cup and nonrotatable relative thereto, the stator core comprising at least two pick up members, the stator being formed from at least one continuous piece of magnetic permeable material; andone or more stator windings disposed on the pickup members of the stator core for sensing changes in a secondary magnetic field generated by the eddy currents in the cup.