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:
Sep. 26, 2017
Filed:
Dec. 28, 2015
National Chung-shan Institute of Science and Technology, Taoyuan, TW;
Yi-Yuh Hwang, Taipei, TW;
Guang-Sheen Liu, Taoyuan, TW;
Chin-Der Hwang, Hsinchu County, TW;
Wei-Guo Chang, Taoyuan, TW;
Chih-Ming Liao, Taoyuan, TW;
NATIONAL CHUNG-SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY, Taoyuan, TW;
Abstract
The present invention mainly provides a precision calibration method for being applied in a high-precise rotary encoder system, wherein the primary technology feature of the precision calibration method is that: using a laser speckle image capturing module to capture N frames of laser speckle image from an optical position surface of a rotary encoding body, and then using image comparison libraries and particularly-designed mathematical equations to calculate N number of image displacements, so as to eventually calculate N number of primary variation angles and sub variation angles corresponding to the N frames of laser speckle image. Therefore, after the rotary encoding body is rotated by an arbitrary angle, an immediate angle coordinate can be precisely positioned according to the primary variation angles, the secondary variation angles and the N number of image displacements.