FOOTPRINT LOCATION SYSTEM
First Claim
1. A footprint location system for determining a user'"'"'s position by user'"'"'s footprints, which include first footprints and second footprints, comprising:
- a first shoe comprising a first measuring unit and generating first footprints when both shoes touch tile ground at the same time;
a second shoe comprising a second measuring unit and generating second footprints when both shoes touch the ground at the same time;
a vector measuring unit measuring displacement vectors between the first footprints and the second footprints based on coordinates provided by the first measuring unit and the second measuring unit; and
a location calculation unit calculating the user'"'"'s position by summing up all displacement vectors with reference to a starting point.
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Accused Products
Abstract
A footprint location system installed on footwear is disclosed. A user has to wear the shoes to track his/her locations without any set up 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.
28 Citations
16 Claims
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1. A footprint location system for determining a user'"'"'s position by user'"'"'s footprints, which include first footprints and second footprints, comprising:
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a first shoe comprising a first measuring unit and generating first footprints when both shoes touch tile ground at the same time; a second shoe comprising a second measuring unit and generating second footprints when both shoes touch the ground at the same time; a vector measuring unit measuring displacement vectors between the first footprints and the second footprints based on coordinates provided by the first measuring unit and the second measuring unit; and a location calculation unit calculating the user'"'"'s position by summing up all displacement vectors with reference to a starting point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A footprint location method for determining a user'"'"'s position by user'"'"'s footprints, which include first footprints and second footprints, comprising:
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providing a first shoe comprising a first measuring unit and generating first footprints when both shoes touch the ground at the same time; providing a second shoe comprising a second measuring unit and generating second footprints when both shoes touch the ground at the same time; measuring displacement vectors between the first footprints and the second footprints based on coordinates provided by the first measuring unit and the second measuring unit; and calculating the user'"'"'s position by summing up the current and all previous displacement vectors with reference to a starting point. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification