发明授权
US6038523A Position detector, encoder board, position detecting method, timer and
electronic device
失效
位置检测器，编码器板，位置检测方法，定时器和电子设备
- 专利标题： Position detector, encoder board, position detecting method, timer and electronic device
- 专利标题（中）： 位置检测器，编码器板，位置检测方法，定时器和电子设备
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申请号： US397申请日： 1998-01-23
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公开(公告)号： US6038523A公开(公告)日： 2000-03-14
- 发明人: Hidehiro Akahane , Noriaki Shimura
- 申请人： Hidehiro Akahane , Noriaki Shimura
- 申请人地址： JPX Tokyo
- 专利权人： Seiko Epson Corporation
- 当前专利权人： Seiko Epson Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX8-130422 19960524
- 主分类号： G01D5/249
- IPC分类号： G01D5/249 ; G04C3/14 ; G04C3/00 ; G04C9/00
摘要：
In a compact, highly precise position detecting apparatus which can perform automatic detection of a hand position, which is required to add a function such as automatic time correction to a time-measuring apparatus, an identification pattern (20) in which identification marks are discretely disposed on a surface of a center wheel (17) moving together with a minute hand (12), which serves as an encoder surface, is formed by hard-magnetic thin film, and sampling is performed by a magnetic sensor (21b) at a plurality of sampling points to determine whether identification marks are provided. The detection signal of the magnetic sensor at each sampling point is classified into three data, "1" and "0" indicating whether identification marks are provided or not, and "*" indicating that identification marks are indefinite. A sampling code obtained by data sampled at the plurality of sampling points is compared with reference identification codes to determine the position. The identification pattern is disposed under a rule concerning sampling points to allow indefinite data to be error-corrected.
公开/授权文献
- USD363031S Test document 公开/授权日：1995-10-10
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