Phase Angle Detection Patents (Class 73/862.326)
  • Patent number: 6265867
    Abstract: An improved position encoder system for providing an output signal representative of the position of a movable body, relative to a reference position, includes at least one magnetic element fixedly attached to the movable body. The system further includes a first spatially orthogonal fluxgate sensor pair and a second spatially orthogonal fluxgate sensor pair for detecting the magnetic field. The first sensor pair is disposed adjacent to the polar axis at a first predetermined distance, and the second pair is disposed adjacent to the polar axis at a second predetermined distance, preferably twice the first predetermined distance. The system further includes a signal processor for receiving a signal from the first sensor pair and a signal from the second sensor pair.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: July 24, 2001
    Assignee: Arthur D. Little, Inc.
    Inventor: J. Thomas Fowler