Optimum route determination
US5486822A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1994 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | May 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B29/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optimum route determination apparatus comprises a plurality of specific points selected from a road map on the basis of a fixed criterion, and an optimum route leading to each destination in which one of the specific points is a departure point and which has been calculated in advance. A route memory has a route table in which data of an initial route leading from the one of the specific points to at least the next specific point through which the optimum route passes are stored in correspondence with the each destination and the one of the specific points. An initialization unit is provided for setting a destination, a specific point near to a vehicle's current location, and specific points along the optimum route. An initial route acquisition unit is provided for retrieving the route table to acquire the data of the initial route in accordance with the destination and the specific point set by the initialization unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.