Patent ID: 9161515
Filing Date: 2015-10-20
Classification: A01K,H04W

Abstract:
1. A wireless boundary system for tracking a location of a movable device in a user-defined roaming area comprising: a master base unit including a transceiver unit and at least two slave base units, each of said master base and slave base units having a transceiver unit, an oscillator and a component for reducing clock speed variation, said master base unit and said slave base units being positioned in spaced relationship to one another; a master base unit activating mechanism for activating the master base unit during a system topology set-up stage to initiate a communication sequence between the master base unit and the slave base units during which respective distances and spatial relationships between the master base unit and the slave base units are determined and placed on a predefined planar coordinate system in which said distances and spatial relationships are identified by respective coordinates within said planar coordinate system to define an overall base unit topology; a trackable device configured to communicate with the master base unit and the slave base units during a boundary set-up stage during which said base units track consecutive positions of the trackable device as the trackable device is moved around a user-defined perimeter surrounding the base units to define the boundary, an area inside the boundary constituting the user-defined roaming area; and at least one movable device trackable within said roaming area and having a movable device transceiver unit in signal communication with the transceiver units of said master base unit and said slave base units, said movable device transceiver unit being incorporated within a PCB assembly that includes a movable device oscillator and a movable device component for reducing clock speed variation between the movable device and the base units, each of said base units being configured to continuously obtain distance values between itself and the movable device on a real time basis using said transceiver units and to communicate said distance values to the master base unit for calculation of a tracking location value indicating a location of the movable device within the planar coordinate system.