Intertial tracking system with provision for position correction
US8825435B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2011 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | May 9, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/1652
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.