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:
Jan. 04, 1994
Filed:
Jul. 24, 1992
Yukio Aoki, Aichi, JP;
Takao Mizutani, Aichi, JP;
Mitsubishi Denki K.K., Tokyo, JP;
Abstract
A precision, high-resolution, absolute, multi-revolution encoder which allows a multi-revolution position value of a shaft to be detected with high reliability, using only a single revolution detector, and makes multi-revolution detection indirectly related to the accuracy of a rotary angle position signal. The output signal from the single multi-revolution detector is used, together with an inverted output signal, to increment and decrement corresponding up/down counters, based on the direction of rotation of the shaft. Each of the up/down counters is incremented or decremented at different points or zones of the shaft rotation so that the rotational value can be determined unambiguously. A conventional grey-code detector provides accurate angle values. The counters may exist as discrete hardware or integrated software embodiments.