The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2009
Filed:
Oct. 04, 2005
Michihisa Komatsu, Iwaki, JP;
Michihisa Komatsu, Iwaki, JP;
Alpine Electronics, Inc., Tokyo, JP;
Abstract
A navigation apparatus and a map matching method are provided. An acceleration sensor detects an acceleration of the vehicle. A gradient determination section determines an angle of inclination of the road link being currently traveled or a value corresponding to the inclination angle. A gradient determination section determines a vertical distance traveled based on the inclination angle and the speed of the vehicle. The accumulated value of the vertical distance is then compared to a set value to determine whether a road link is a downgrade link or an upgrade link. A map matching processor performs map matching processing using a result of the determination and the gradient information.