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:
May. 25, 1999
Filed:
Nov. 27, 1996
Fujitsu Ten Limited, Hyogo, JP;
Abstract
A processing apparatus within a navigation system comprises a track calculating portion for subsequently memorizing a bearing detected by a bearing sensor to calculate a track, and a map match processing portion for performing the map matching process. A position correcting portion corrects a vehicle position onto a road in accordance with road data 35 by the map match processing portion 34. The bearing correction is not effected when the bearing difference conditions are established although a bearing correcting portion 39 corrects the bearing showing the progressive direction of the vehicle into the link bearing of the road. The bearing difference condition is a condition where the bearing difference between the link bearing and the bearing showing the progressive direction of the vehicle is large, and there is a possibility of further increasing the error when the error of the bearing showing the progressive direction of the vehicle is large and the correction is effected in the link bearing. The offset correction can be carried out precisely with proper timing when a gyroscopic device is used as the bearing sensor.