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. 18, 2012
Filed:
Dec. 11, 2009
Toru Nishida, Kanagawa, JP;
Hiroaki Satoh, Kanagawa, JP;
Susumu Kibayashi, Kanagawa, JP;
Takeshi Zengo, Kanagawa, JP;
Toru Nishida, Kanagawa, JP;
Hiroaki Satoh, Kanagawa, JP;
Susumu Kibayashi, Kanagawa, JP;
Takeshi Zengo, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A speed calculation device is provided. The generation component generates a plurality of pulse signals with different phases in accordance with rotation of a rotating body. The detection component detects rises and falls of respective pulses of the plurality of pulse signals generated by the generation component. The duration calculation component, each time a rise or fall is detected by the detection component, calculates a total duration of a pre-specified number of durations representing detection intervals of rises or falls detected prior to the rise or fall currently detected by the detection component. The speed calculation component calculates a speed relating to rotation of the rotating body on the basis of the total duration and a rotation angle of the rotating body that corresponds to one pulse of the pulse signals.