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Laser tracker positioning method based on laser tracker multi-position measuring system

A laser tracker, measurement system technology, applied in radio wave measurement systems, measurement devices, instruments, etc., can solve the problem of inability to correct random components of measurement results

Active Publication Date: 2019-06-14
BEIJING UNIV OF TECH
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Problems solved by technology

However, most of the traditional error correction methods cannot correct the random components in the measurement results, which has certain limitations.

Method used

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  • Laser tracker positioning method based on laser tracker multi-position measuring system
  • Laser tracker positioning method based on laser tracker multi-position measuring system
  • Laser tracker positioning method based on laser tracker multi-position measuring system

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Embodiment Construction

[0058] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0059] build as figure 1 The experimental platform of the multi-site measurement system of the laser tracker shown in the figure optimizes the site coordinates of the laser tracker through the following steps:

[0060] Step 1: Build a laser tracker multi-station measurement system. In the measurement system, the three-coordinate measuring machine is Leitz Infinity of Hexagon Company, the model of high-precision turntable is RT400, and the laser tracker is LaserTracer of Etalon Company, model 07 2009 TR IF. The spatial range of the points to be measured by the coordinate measuring machine is planned to be 450×600×450mm 3 . Within this space, the number of points to be measured is planned to be n=64, and the number of laser tracker stations is m=11. In the path planning of ...

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Abstract

The invention discloses a laser tracker positioning method based on a laser tracker multi-position measuring system. The laser tracker positioning method comprises the following implementing processesthat a laser tracker multi-position measuring system is established; a laser tracker positioning is self-calibrated based on a Levenberg-Marquardt algorithm; and a parameter [mu]i is selected; lasertracer position coordinates are optimized; and the laser tracer position coordinates are optimized through the Levenberg-Marquardt algorithm and a singular value decomposition and transformation method of a covariance matrix. According to the laser tracker positioning method based on the laser tracker multi-position measuring system, the precision of the laser tracer position coordinates can be improved, multi-shaft machine tool coordinate errors are more accurately corrected, and thus the corrected results are more accurate.

Description

technical field [0001] The invention relates to a laser tracker site optimization method, in particular to a laser tracker site optimization method based on a laser tracker multi-site measurement system, belonging to the technical field of precision testing. Background technique [0002] With the continuous development of modern precision manufacturing and measurement technology, modern industry has put forward higher requirements for its precision while increasing the demand for multi-axis machine tools. The error correction technology only corrects the measurement results, which is low in cost, high in efficiency, and can be applied on a large scale. However, most of the traditional error correction methods cannot correct the random components in the measurement results, which has certain limitations. The laser tracker has the advantages of fast measurement speed and high precision, and it is easy to realize the tracking measurement of spatial coordinates. Therefore, the...

Claims

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Application Information

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IPC IPC(8): G01S17/66G01S7/481G01S7/497
Inventor 陈洪芳姜博石照耀汤亮张爽孙衍强
Owner BEIJING UNIV OF TECH
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