发明授权
- 专利标题: Distance measuring device
- 专利标题(中): 距离测量装置
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申请号: US70792申请日: 1998-05-01
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公开(公告)号: US5959734A公开(公告)日: 1999-09-28
- 发明人: Shoichi Tanaka , Yukio Fukushima , Masahira Akasu
- 申请人: Shoichi Tanaka , Yukio Fukushima , Masahira Akasu
- 申请人地址: JPX Tokyo
- 专利权人: Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人: Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX9-324501 19971126
- 主分类号: G01B7/30
- IPC分类号: G01B7/30 ; G01B7/00 ; G01B11/00 ; G01C3/06 ; G01S7/48 ; G01S7/481 ; G01S17/08 ; G01S17/42 ; G02B7/32 ; G02B26/10 ; G01B11/14 ; G01B11/24
摘要:
A distance measuring device having an improved control performance in a compact body by simplifying a structure for scanning a laser beam and a method of controlling the scanning. The device has a mirror for scanning an emitted laser beam, an axis around which the mirror is swung, a permanent magnet which swings along with the mirror, a core disposed opposite to the permanent magnet, a coil provided in the periphery of the core, a Hall element for detecting a swing angle of the mirror, and a circuit for controlling swing motion with a signal derived from a swing waveform formed in a predetermined shape in order to control a current in the coil, and a control signal formed by a controlled variable calculated from a deviation between a predetermined position of the mirror and a detected position.
公开/授权文献
- USD400557S Sunglasses 公开/授权日:1998-11-03