System and method for estimating and detecting speed
US8275490B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2010 |
| Grant date | Sep 25, 2012 |
| Priority date | — |
| Expiry date | Nov 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/096741
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for determining instances when a vehicle's indicated speed exceeds a governing speed includes a receiver to receive information from which a vehicle's location envelope, indicated direction of travel, and indicated speed can be derived, and a processor. The processer is configured to ascertain a location envelope in which the vehicle is located, an indicated speed of the vehicle, and a direction of travel of the vehicle at a sample time. It is also configured to select the governing speed for the vehicle at the sample time, which includes ascertaining possible road segments with at least a portion within the location envelope, eliminating road segments with a road segment direction of travel inconsistent with the indicated direction of travel, and selecting as the governing speed a speed associated with a remaining road segment. The processor will then determine if the indicated speed exceeds the governing speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.