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. 16, 1999
Filed:
May. 09, 1997
Kenichi Nakano, Fukuoka, JP;
Kazuhiko Ikeda, Dazaifu, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a vehicle navigator using an acceleration sensor for detecting a running distance, the precision of measuring the running distance is intended to be improved. Output data of the acceleration sensor during a predetermined time duration is stored in an output storage, and the average value or 'mean acceleration' of output data is calculated by a mean acceleration calculator A running distance calculator calculates a difference between the acceleration measured with the acceleration sensor and the mean acceleration calculated by the mean acceleration calculator, and this difference is double integrated to obtain the running distance.