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:
Dec. 11, 2012
Filed:
Oct. 17, 2007
Hayami Kikawa, Kanagawa, JP;
Satoshi Yanobe, Kanagawa, JP;
Hayami Kikawa, Kanagawa, JP;
Satoshi Yanobe, Kanagawa, JP;
Sokkia Topcon Co., Ltd., Kanagawa, JP;
Abstract
An angular correction method is provided for a rotary encoder in which angular skip does not occur in determining an angle at a position of switching a combination of successive angular graduation images used in interpolation calculation. An angular correction quantity Cincludes (1) a residual rbetween a position computed from a model and an actually read position P, for each angular graduation image position and (2) a tangential slope f'(x) of residual curve, r=f(x), determined by fitting the residuals to a polynomial f(x) which is a function of angular graduation image number x. The actually-read position P is corrected as P+Cto perform interpolation calculation determining an angle without angular skip.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile