发明名称 |
Pulse light receiving time measurement apparatus and distance measurement including the same |
摘要 |
<p>A pulse light receiving time measurement apparatus according to the present invention includes a light receiving element (13a) receiving reflected pulse light from an object to be measured; a pulse light receiving time measurement circuit (2) measuring a time when pulse light is irradiated to the object and a time when the reflected pulse light from the object is received at the light receiving element (13a); a resonance circuit (13b) converting an optical pulse signal (RP)of the reflected pulse light from the light receiving element (13a) into a damping signal (DP); a multi-stage amplifier group (13c1 to 13c4) amplifying the damping signal (DP) from the resonance circuit (13b); a damping signal processing circuit composed of amplitude comparators (13f1 to 13f4) and zero-cross comparators (13g1 to 13g4), and processing the damping signal (DP) from each stage of the multi-stage amplifier group (13c1 to 13c4), in which operations of the respective zero-cross comparators (13g1 to 13g4) are determined according to comparison results of the respective amplitude comparators (13f1 to 13f4) for the amplifier group.
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申请公布号 |
EP1903354(A3) |
申请公布日期 |
2009.06.17 |
申请号 |
EP20070018363 |
申请日期 |
2007.09.19 |
申请人 |
KABUSHIKI KAISHA TOPCON |
发明人 |
YOSHINO, KENICHIRO;MINEGISHI, ISAO |
分类号 |
G01S17/10;G01S7/487 |
主分类号 |
G01S17/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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