Average vehicle speed calculation device
US6470263B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2001 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | May 17, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a navigation system for vehicles, a type of road a vehicle travels is determined based on a present position of a vehicle and road data, and a change in the type of road is determined. The road type is determined based on the type of link the vehicle travels referring to a table storing a relation between a link type and a road type. A travel distance is accumulated until the travel distance exceeds a predetermined determination reference, when the road type remains unchanged. An instant vehicle speed is calculated each time the vehicle travels the determination reference. An average vehicle speed is calculated by using the instant vehicle speed calculated for each road type. The average vehicle speed is used to notify an estimated time of arrival at a destination or a passing point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.