×

Rotational sensor system

  • US 6,305,221 B1
  • Filed: 06/14/1999
  • Issued: 10/23/2001
  • Est. Priority Date: 12/12/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A system for measuring movement characteristics of a moving object over a plurality of measurement cycles, said system comprising:

  • an accelerometer unit attached to said object, said accelerometer unit configured so as to provide acceleration signals corresponding to accelerations associated with a movement of said object during said plurality of measurement cycles;

    a magnetometer unit attached to said object and configured so as to provide signals corresponding to magnetic field values within which said moving object is located;

    a processing system coupled to process sets of signals provided by said magnetometer unit and sets of signals corresponding to gravity field values within which said moving object is located based on signals provided by said accelerometer unit each said set of said magnetic field value and said gravity field value signals provided before and after an incremental change in rotation of said moving object within each one of said measurement cycles, said processing system being configured to calculate based on said gravity and magnetic field values, incremental rotation angles dθ

    about an axis of a three dimensional coordinate system associated with said incremental change in rotation.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×