发明名称 |
Code-space optical electronic distance meter |
摘要 |
An electronic distance meter comprises an integrated circuit from a GPS navigation receiver having a local pseudo-random number code generator for code demodulation that is connected to modulate either a polychromatic or a monochromatic light source. An optical system focuses the light on a distant target with an unknown range. Reflections from the distant target are focused on a light detector that produces a phase-delayed copy of the original pseudo-random number code. The time-of-flight to and back from the distant target is a function of the distance. The GPS receiver integrated circuit computes the range based on the code-phase delay to a precision better than one centimeter. The position of a remote target can be triangulated from several electronic distance meters each having known positions, e.g., determined by included GPS navigation receivers. Conversely, the position of a single electronic distance meter can be determined by triangulation by ranging to several remote targets each having known positions.
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申请公布号 |
US6031601(A) |
申请公布日期 |
2000.02.29 |
申请号 |
US19980112022 |
申请日期 |
1998.07.08 |
申请人 |
TRIMBLE NAVIGATION LIMITED |
发明人 |
MCCUSKER, MICHAEL V.;SORDEN, JAMES L.;RABY, PETER |
分类号 |
G01C15/00;G01S5/14;G01S17/32;G01S19/10;G01S19/21;G01S19/46;(IPC1-7):G01C3/08 |
主分类号 |
G01C15/00 |
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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