Caterpillar Inc.

James J Kalafut

Robert J Price

Adam J Gudat

William E Allen

Jeffrey Stephen Alig

N Keith Lay

A method and apparatus for determining a desired position of a pseudolite at a site. The method and apparatus includes predicting an area of coverage of the site by at least one GPS satellite, determining a condition of reduced coverage as a function of the predicted area of coverage, displaying the area having reduced coverage on a terrain map, and placing a pseudolite at a location at the site to provide coverage in the area having reduced coverage.

Determining desired pseudolite locations based on predicted GPS coverage

A method and apparatus for providing a display of a work machine at a work site. The work machine has a work implement controllably attached. The method includes the steps of determining a position of the work machine relative to the site, determining a position of the work implement relative to the work machine, and displaying a scaled image of the site, the work machine, and the work implement relative to the work machine, wherein movement of the work implement relative to the work machine is shown.

Method and apparatus for providing a display of a work machine at a work site

A method for determining a position and a heading of a work machine having a work implement controllably attached. The method includes the steps of positioning the work machine at a desired work location, determining an initial position and heading of the work machine in site coordinates, determining a position of the work implement relative to the work machine, positioning the work implement at a desired reference point, determining the position of the work implement at the reference point in site coordinates, periodically positioning the work implement at the reference point during work operations, and determining a new position and heading of the work machine as a function of the position of the work implement relative to the work machine.

Method for determining a position and heading of a work machine

A method and apparatus for displaying a location of an object at an earthworking site. The method and apparatus includes determining a location in geographical coordinates of an earthworking implement at the earthworking site, determining a location in geographical coordinates of the object, displaying the earthworking implement and the object on a display having a top view and a side profile view of the earthworking site, selecting a perimeter of interest in the top view with respect to the earthworking implement, determining the coordinates of a portion of the object bounded by the perimeter of interest, and displaying a three-dimensional image of the portion of the object in the side profile view as a function of the perimeter of interest.

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Peoria, IL, United States of America

James J Kalafut