NAVIGATION SYSTEM FOR SPECIFYING ONE'S OWN VEHICLE POSITION BASED ON ALTITUDE VARIATION, AND ITS METHOD

摘要

PROBLEM TO BE SOLVED: To acquire accurate information on altitude variation, to specify the road on which one's own vehicle travels based on the acquired information on altitude variation, and to correctly display the one's own vehicle position.;SOLUTION: This navigation system detects atmospheric pressure using a pressure sensor, and detects variation in voltage by comparing the output voltage from the pressure sensor with a predetermined reference voltage. The navigation system determines gradient based on the variation in voltage and altitude variation, compares it with the gradient of the road in map data of the point having a one's own vehicle candidate, and corrects the reliability of the one's own vehicle candidate having matching gradient.;COPYRIGHT: (C)2008,JPO&INPIT