Non-orthogonal shaft laser total station instrument-based three-dimensional coordinate measurement method

A technology of non-orthogonal axes and three-dimensional coordinates, applied in the direction of measuring devices, instruments, and optical devices, can solve the problems of increasing the difficulty and cost of processing and assembly, and meet the requirements of realizing and eliminating the orthogonality of the shaft system Effect

Active Publication Date: 2017-03-29
TIANJIN UNIV
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AI Technical Summary

Problems solved by technology

The three-axis orthogonal structure increases the difficulty and cost of instrument design, processing and assembly
However, according to the triangulation measurement principle, two or more instruments are required to form a three-dimensional coordinate measurement system

Method used

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  • Non-orthogonal shaft laser total station instrument-based three-dimensional coordinate measurement method
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  • Non-orthogonal shaft laser total station instrument-based three-dimensional coordinate measurement method

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Embodiment Construction

[0039] The technical solution adopted in the present invention is: a method for measuring three-dimensional coordinates based on a non-orthogonal axis laser total station, and further includes the following steps:

[0040] 1. Use two single-axis turntables or a two-axis pan-tilt and a laser ranging module to build a non-orthogonal axis laser total station;

[0041] 2. Respectively name the two single-axis turntables or the two rotating platforms of the pan-tilt as the horizontal turntable and the vertical turntable, the corresponding rotation center axes are the vertical axis and the horizontal axis, and the laser beam of the ranging module is the measurement axis;

[0042] 3. Rotate the horizontal turntable and vertical turntable to the zero position, and use the three-coordinate measuring machine, theodolite measurement system or laser tracker to calibrate the parameters of the vertical axis, horizontal axis and measurement axis. The calibration parameters of each axis includ...

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Abstract

The invention relates to a precision measuring instrument, in particular, a non-orthogonal shaft laser total station instrument-based three-dimensional coordinate measurement method. The objective of the invention is to realize the three-dimensional coordinate measurement of a space point and decrease the difficulty and cost of instrument design, processing and assembly. The method includes the following steps that: (1) two single-axis turntables or a two-axis pan/tilt holder and a laser ranging module are adopted to construct a non-orthogonal shaft laser total station instrument; (2) the two rotation platforms of the two single-axis turntables or the pan/tilt holder are named as a horizontal turntable and a vertical turntable respectively; (3) ranging information corresponding to a calibration point on a measurement axis is obtained and recorded; (4) a non-orthogonal shaft laser total station instrument measurement coordinate system O-XYZ is established; (5) a conversion relationship between a calibration device coordinate system and the non-orthogonal shaft laser total station measurement coordinate system is determined; (6) the space coordinates of calibration points on each axis and the normalized direction vectors of each axis are converted into the non-orthogonal shaft laser total station measurement coordinate system; and (7) the space coordinate measurement of a target point is achieved. The method of the present invention is mainly applied to design and manufacturing conditions.

Description

technical field [0001] The invention relates to a precision measuring instrument, in particular to a three-dimensional coordinate measuring method based on a non-orthogonal axis laser total station. Background technique [0002] The laser trackers of Swiss Leica, American API and Faro, the total station, laser radar and Leica 3D Disto measuring instrument of Leica and other companies are all single-station three-dimensional coordinate measuring devices. In comparison, they all have the same structural mode, that is, the structural mode of laser ranging combined with a two-axis rotating platform. Although the principles of distance measurement are different, the structural mode has a common outstanding feature: the two rotation central axes of the rotating platform (usually called the horizontal axis and the vertical axis) and the distance measurement axis (laser beam) form a three-orthogonal Shaft system architecture, that is, the horizontal axis is perpendicular to the ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00
CPCG01B11/002
Inventor 吴斌薛婷杨峰亭
Owner TIANJIN UNIV
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