A SYSTEM AND METHOD FOR DETERMINING PROXIMITY TO A WIRELESS BOUNDARY OF PROGRAMMABLE SHAPE USED IN ANIMAL CONTAINMENT

摘要

Described is a boundary proximity determining system for wirelessly defin ing a boundary having a programmable shape and for indicating the occurrence of a rover unit traversing the boundary. The boundary proximity determining system includes a base station unit that generates a plurality of magnetic fields. The boundary proximity determining system also includes a rover unit that is responsive to the generated magnetic fields such that the rover uni t defines the boundary in terms of the intensities and polarities of the mag netic fields. The rover unit determines whether the rover unit is within or outside the boundary by determining the current location of the rover unit i n terms of the intensities and polarities of the magnetic fields and compari ng the current location to the boundary.