发明授权
- 专利标题: Method of and apparatus for electro-optical distance measurement
- 专利标题(中): 电光距离测量方法及装置
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申请号: US10284223申请日: 2002-10-30
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公开(公告)号: US06917415B2公开(公告)日: 2005-07-12
- 发明人: Torsten Gogolla , Andreas Winter , Helmut Seifert
- 申请人: Torsten Gogolla , Andreas Winter , Helmut Seifert
- 申请人地址: LI Schaan
- 专利权人: Hilti Aktiengesellschaft
- 当前专利权人: Hilti Aktiengesellschaft
- 当前专利权人地址: LI Schaan
- 代理机构: Sidley Austin Brown & Wood, LLP
- 优先权: DE10112833 20010316
- 主分类号: G01C3/06
- IPC分类号: G01C3/06 ; G01S7/486 ; G01S7/497 ; G01S13/22 ; G01S17/10 ; G01C3/08
摘要:
A method of and an apparatus for an electro-optical distance measurement in which a laser beam of a laser diode (1) is directed as an intensity modulated train of emitted light pulses onto an object, the reflected measurement pulse train (10) is detected by a light detector (6), which generates, in response to the detection of a measurement pulse train, a first photo-current component, a smaller portion of the intensity modulated pulse train is branched out as a reference pulse train and, after passing a known reference path, is also detected by the light detector (6), which generates in response to this detection a second photo current component, and the light detector converts the measurement pulses, together with a mixer pulse train generated by a local oscillator, into a comparatively low-frequency IF-region that determines, after a corresponding conversion, the measured distance.
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