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Digital compass with multiple sensing and reporting capability

  • US 6,243,660 B1
  • Filed: 10/12/1999
  • Issued: 06/05/2001
  • Est. Priority Date: 10/12/1999
  • Status: Expired due to Term
First Claim
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1. A multi-function electronic compass, comprising:

  • a microprocessor system including electronic memory for managing functions of the electronic compass;

    a magnetometer system coupled to the microprocessor for sensing the Earth'"'"'s magnetic field and providing input according to the direction of the Earth'"'"'s magnetic field relative to the orientation of the compass;

    a display for providing output including directional indicia for a user of the compass; and

    an accelerometer for sensing changes in acceleration of the compass;

    wherein the microprocessor system uses accelerometer input and stored data to determine walking distance for a user of the compass, integrating the walking distance with direction input to determine changes in location for the user, and displays connected legs of a walking trip on the display, with the legs arranged in direction of travel and the length of each leg proportional to walking distance traveled in the direction of the leg.

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