×

Permanent magnet rotary accelerometer

  • US 6,282,961 B1
  • Filed: 09/24/1999
  • Issued: 09/04/2001
  • Est. Priority Date: 09/24/1999
  • Status: Expired due to Fees
First Claim
Patent Images

1. 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; and

    one 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.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×