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. 27, 1989
Filed:
Mar. 29, 1988
Norio Okutani, Neyagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A movable object position detecting method and apparatus perform detection of an absolute position of a code plate attached to the movable object, by using at least two position detection parts which include an upper-digit (namely, lower-order) position detection part and a lower-digit (namely, higher-order) position detection part, respectively. The upper-digit position detection part detects the absolute position of the code plate within a predetermined detection range to provide binary detection data. The lower-digit position detection part detects a position of the code plate within a detection range twice as large as a minimum detection width of the upper-digit position detection part to provide digitized detection data. By processing detection data on the basis of the coincidence or difference between respective overlapping digits of detection data of the upper-digit position detection part and detection data of the lower-digit position detection part, accurate position data of the code plate are determined.