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:
Nov. 18, 1986
Filed:
Feb. 10, 1983
Satoru Chujo, Sagamihara, JP;
Kenichi Mitamura, Kawasaki, JP;
Nissan Motor Company, Limited, Kanagawa, JP;
Abstract
A drive guide system for an automotive vehicle indicates the remaining distance to a destination and the direction to the destination. In order to indicate the remaining distance and the direction in which to travel, travelling direction and travelling distance are detected. A direction sensor for detecting the terrestrial magnetic field is employed in the drive guide system. The direction sensor can be easily influenced by background noises in its surroundings. The background noise thus affects the detection of the direction of the terrestrial magnetism and thus causes errors in the calculation of the remaining distance and the direction to travel. Therefore, the variation of the background noise is sequentially monitored to detect the magnitude of the background noise affecting the detection of the direction, and when the variation exceeds acceptable limits, an error signal is produced.