Footprint location system
US7671734B2 · kind B2 · utility
1Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2007 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Feb 24, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S11/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A footprint location system installed on footwear is disclosed. A user simply has to wear the shoes to track his/her locations without any setup or calibration efforts. The footprint location system measures and tracks the displacement vectors along a trail of footprints. The position of a user can be determined by summing up the current and all previous displacement vectors. In addition to being infrastructure-free, the footprint location method does not have problems found in existing indoor location systems, such as obstacles, multi-path effects, signal noises, signal interferences, and dead spots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.