发明申请
- 专利标题： Speed change detection apparatus, image forming apparatus, and method
- 专利标题（中）： 变速检测装置，图像形成装置及方法
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申请号： US12003293申请日： 2007-12-21
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公开(公告)号： US20080150543A1公开(公告)日： 2008-06-26
- 发明人: Fumihito Masubuchi , Shinji Kato
- 申请人： Fumihito Masubuchi , Shinji Kato
- 专利权人： RICOH COMPANY, LTD.
- 当前专利权人： RICOH COMPANY, LTD.
- 优先权： JP2006-348644 20061225; JP2007-068564 20070316
- 主分类号： G01N27/60
- IPC分类号： G01N27/60
摘要：
A speed change detection apparatus includes an image carrier for carrying a latent image, and a latent image pattern forming device for forming a latent pattern image on the image carrier. The pattern image includes periodically formed line or dot images. An alternating current conversion type surface potential sensor is provided to detect a potential of the surface of the photoconductive member. The alternating current conversion type surface potential sensor further detects a change in speed of the image carrier by detecting a moiré appearing on the latent image pattern.
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