Method for determining the length of a path traveled by a vehicle
US9086279B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2013 |
| Grant date | Jul 21, 2015 |
| Priority date | — |
| Expiry date | Oct 24, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods are provided for determining the length of a path traveled by a vehicle using an onboard unit that generates a sequence of position readings and a related position quality index for each position reading. A set of consecutive position readings is extracted from the sequence. Position readings are discarded having position quality indices falling below a threshold. A set quality index is determined based on the number of position readings of the set or on the position quality indices. If the set quality index exceeds a threshold, the path length is determined based on mutual distances of consecutive position readings of the set. Otherwise, the path length is determined using a digital road map composed of road segments by associating the position readings of the set with at least one road segment, and determining the path length based on the segment length of the at least one road segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.