초록 ▼

A momentarily changing position of a travelling vehicle is correctly identified by a vehicular nagivation system on which a magnetism sensor, angular velocity sensor, travel distance sensor and global positioning system are mounted. The current position of the vehicle is identified by, for example,

A momentarily changing position of a travelling vehicle is correctly identified by a vehicular nagivation system on which a magnetism sensor, angular velocity sensor, travel distance sensor and global positioning system are mounted. The current position of the vehicle is identified by, for example, storing data of a road on a map in the form of numerical values, measuring a predetermined distance which the vehicle has travelled and computing the current position on the road based upon the predetermined distance thus measured.

대표청구항 ▼

A method for identifying the current position of a vehicle on a road map, comprising the steps of: storing data on the positions of roads and intersections on a road map as map data in the form of numerical values; detecting a traveling of a predetermined distance by the vehicle and a current azimut

A method for identifying the current position of a vehicle on a road map, comprising the steps of: storing data on the positions of roads and intersections on a road map as map data in the form of numerical values; detecting a traveling of a predetermined distance by the vehicle and a current azimuth of the vehicle to thereby obtain a measured portion on said road map; calculating the distance between said measured position and the point on a road proximate to said measured position on said road map; comparing said distance with a predetermined threshold value to judge whether or not said distance is less than said predetermined threshold value; identifying said point as a current position on said road map when said distance is less than said predetermined threshold value; judging whether or not the vehicle has curved when said distance is not less than said predetermined threshold value; and carrying out an intersection loading to coincide said measured position of the vehicle with the intersection proximate to said measured position when it is judged that the vehicle has curved.