×

ROTATIONAL VELOCITY AND DIRECTION SENSING SYSTEM

  • US 20030001563A1
  • Filed: 06/27/2001
  • Published: 01/02/2003
  • Est. Priority Date: 06/27/2001
  • Status: Active Grant
First Claim
Patent Images

1. A rotational sensor system for detecting rotational velocity and rotational direction of a rotatable member rotatable in a forward and in a reverse rotational direction about an axis of rotation, the rotational sensor system comprising:

  • a rotatable element adapted to operatively engage and rotate with the rotatable member about the axis of rotation, with the rotatable element having a generally circular periphery that includes means, spaced about the periphery, for creating magnetic field variations;

    first sensor means, adjacent to the periphery, for sensing variations in a magnetic field and producing an electric signal in response thereto;

    second sensor means, adjacent to the periphery and circumferentially spaced about the periphery from said first sensor means, for sensing variations in a magnetic field and producing an electric signal in response thereto;

    means for generating a magnetic field;

    means for receiving the electric signals from the first sensor means and second sensor means and detecting a phase shift between the signals from the first sensor means and the second sensor means; and

    means for generating an output signal indicative of rotational velocity and rotational direction of the rotatable element.

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