Road sinuosity to enhance speed approximation in road navigation
US9759576B2 · kind B2 · utility
0Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2015 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | Dec 14, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/39
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A navigation system which includes a central processing unit; a nonvolatile storage for storing digitized map data; a road sinuosity S(R) of a route including a plurality of digitized road segments calculated from a starting point to a destination point to be traveled by a user by summing the rotation angle of each of the road segments divided by the distance of each of the road segments; a module to determine an estimated travel time of the route; a module to determine a corrected travel time using the road sinuosity S(R); and a display to display the corrected travel time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.