发明授权
US5804816A Position transducer having optical beam generator for covering wide
detectable range
失效
具有光束发生器的位置传感器，用于覆盖宽的可检测范围
- 专利标题： Position transducer having optical beam generator for covering wide detectable range
- 专利标题（中）： 具有光束发生器的位置传感器，用于覆盖宽的可检测范围
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申请号： US755603申请日： 1996-11-25
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公开(公告)号： US5804816A公开(公告)日： 1998-09-08
- 发明人: Jun Yamamoto , Tsutomu Sasaki
- 申请人： Jun Yamamoto , Tsutomu Sasaki
- 申请人地址： JPX Shizuoka-ken
- 专利权人： Yamaha Corporation
- 当前专利权人： Yamaha Corporation
- 当前专利权人地址： JPX Shizuoka-ken
- 优先权： JPX7-313185 19951130
- 主分类号： G01B11/00
- IPC分类号： G01B11/00 ; G01D5/34 ; G01V8/14 ; G10H1/055 ; G10H1/34 ; H01H35/00 ; H03K17/78 ; G06M7/00
摘要：
A position transducer determines a current key position through variation of light intensity interrupted by a shutter plate attached to a key, and a semi-column shaped convex lens elongates the light beam radiated from an optical fiber in a direction parallel to the trajectory of the key so that the light beam fully covers the motion of the shutter plate.
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