Nav-track, Inc.

Itrack LLC

Thomas Stiglich

G Edzko Smid

Ka Chai Cheok

Edzko Smid

Gert Edzko Smid

Paul W Fleck

Techniques and methodologies are disclosed for minimizing inaccuracies in distance measurements and location determinations for autonomous vehicles or targets ranging to subsets of beacons. Such techniques and methodologies can be used to better control (e.g., navigate) an autonomous vehicle in an area and/or along a pathway, or trajectory.

Method and system for locating and navigating a target

A distance separation tracking process is provided that includes the transmission of a periodic radio frequency original signal from a beacon transceiver. The original periodic signal from the beacon transceiver is received at a remote target transceiver as a target received periodic signal. The target retransmits the received periodic signal to the beacon transceiver as a return periodic signal. Data points of the return periodic signal are sampled and used to calculate a phase differential between the original periodic signal and the return periodic signal that correlates to the distance separation range between the beacon transceiver and the target transceiver.

Distance separation tracking system

A subject location tracking process is provided that includes the attachment of a system to a subject where the system includes a radiofrequency sensor integration module, an inertial tracking module, and a microprocessor. Radiofrequency signals are communicated from the radiofrequency sensor integration module to a remote radiofrequency transceiver beacon. A measured range is determined between the radiofrequency sensory integration module and the beacon. An error value E is then computed between the measured range and a predicted range. The predicted range is computed from the inertial tracking module alone based on positional data as to location and orientation of the system. The location data of the subject is determined with a microprocessor and displayed at the location. The present invention operates to provide a high degree of accuracy as to the position of a subject in spite of intermediate obstructions and without reliance on global position satellite systems, fixed reference signals, or line of sight.

Intertial tracking system with provision for position correction

The present invention relates to a navigation unit and base station used for determining location. A plurality of base stations are initialized to determine their location relative to each other. At the navigation unit, the time of arrival of at least one signal from each of the plurality of base stations is measured. From this, the location of the navigation unit relative to the plurality of base stations may be directly calculated using a closed solution. In one embodiment, a time of arrival technique is used and in another embodiment a time difference of arrival technique is used. Preferably an ultra-wide band frequency is utilized.

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Shelby Township, MI, United States of America

Thomas Stiglich