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:
Apr. 04, 1989
Filed:
Sep. 18, 1987
Gero Wuttke, Regensburg, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A navigation equipment for a moving vehicle which includes a magnetic field probe 1 and a travel distance meter 2 which supplies position values Xa, Ya using dead-reckoning navigation which can be checked with a street map. The street map is digitally represented in a plat memory 4 using a network 42 which has meshes comprising network elements 421. The network elements 421 uses a binary 1 which represents a street and in other positions utilize a binary 0. The addresses of the network elements 421 in the plat memory 4 are ordered according to an x-y coordinate system and are addressable with the position coordinates Xa and Ya. The correction stage 5 checks a position indication Xa, Ya for a street value 1 or a 0 (deviant value) and when k successive deviant values occur, they are successively shifted in direction until street values result. The resulting shift values are then added as a correction value to every position indication Xa, Ya afterwards.