Numerex Corporation

Troy E Lanes

Jeffrey O Smith

Richard Lee Burtner

Mark L Belangee

Joe Scheffel

Robert A Wachtel

Pierre H Parent

A system method for improving the accuracy of a tracking device is described where the tracking device cannot achieve an accurate GPS fix due to low observability. The system and method improves accuracy determining a current position for the tracking device using incomplete information from the GPS. The current position is added to a historical table of previous position determinations and a normalized center position is calculated from the current position and previous position determinations. The position of the tracking device is inferred from the normalized center position.

Using statistical analysis to infer an accurate GPS location for use in tracking devices

A remote monitoring device is described that includes a microprocessor, a location determination unit connected to the microprocessor and operable to determine a location of the remote monitoring device. One or more interfaces connect the microprocessor to one or more sensors, wherein the one or more interfaces includes a multi-function radio frequency interface to communicate with wireless sensors. A radio frequency identification (RFID) interface interacts with RFID readers using the multi-function radio frequency interface, and a configuration interface to allow a user to configure the monitoring device also uses the multi-function radio frequency interface. The monitoring device uses a transmitter to transmit the location, status and collected information.

Satellite based tracking and data device with multi-function radio frequency interface

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Belgrade, MT, United States of America

Troy E Lanes