Hand-hold line laser three-dimensional measuring system based on spacing wireless location

A three-dimensional measurement, space wireless technology, applied in the direction of measuring devices, optical devices, image analysis, etc., can solve the problems of complex structure, many error sources, demanding work space, etc., and achieve the effect of flexible measurement space

Inactive Publication Date: 2009-08-12
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

When the three-coordinate measuring machine has strict requirements on the working space, it is difficult to achieve real-time measurement on the processing site
The second generation has improved on the basis of the firs

Method used

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  • Hand-hold line laser three-dimensional measuring system based on spacing wireless location
  • Hand-hold line laser three-dimensional measuring system based on spacing wireless location
  • Hand-hold line laser three-dimensional measuring system based on spacing wireless location

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Embodiment Construction

[0017] The working principle of the measurement system of the present invention is: use the handheld line laser scanning subsystem as the measurement terminal, and accurately measure the point cloud data of the complex surface of the workpiece in the coordinate system of the local scanning measurement subsystem through the binocular stereo vision three-dimensional measurement principle; at the same time, by Based on the indoor wireless positioning subsystem, track the 6-DOF pose information of the line laser scanning measurement subsystem in the global world coordinate system in real time in the workspace, and calculate the conversion between the line laser scanning measurement subsystem coordinate system and the global world coordinate system relationship, and then automatically convert the measured point cloud data in the coordinates of the local line laser scanning subsystem to the global world coordinate system, thereby realizing handheld mobile measurement.

[0018] The sp...

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Abstract

The invention discloses a hand-held line laser three-dimensional measuring system based on spatial wireless positioning, which comprises an indoor wireless positioning subsystem and a hand-held measuring subsystem, wherein the indoor wireless positioning subsystem comprises two CCD cameras and a line laser projector; the hand-held measuring subsystem comprises a computer, at least four signal transmitters and at least three receivers; the two CCD cameras and the line laser projector are packaged into a hand-held support; various signal transmitters are uniformly distributed on indoor ceiling; various receivers are uniformly arranged on the hand-held support; the world coordinate of the hand-held support is obtained by calculation of world coordinates of various receivers received by the computer; and the three-dimensional coordinate of the surface of a workpiece is obtained by processing of two laser stripe images shot by the two cameras. The invention is different from the conventional positioning concept and is not limited by a mechanical positioning device, so that the whole system has the advantages of simplicity, flexibility, large measuring space and the like. Moreover, the system is not limited by the freedom degree in a large work measurement space and can perform measurement at any place and is lightweight and portable.

Description

technical field [0001] The invention belongs to the technical field of test and measurement, and in particular relates to a hand-held line laser three-dimensional measurement system based on spatial wireless positioning. Background technique [0002] Today, when modern manufacturing technology is developing toward automation, integration, intelligence and flexibility, three-dimensional measurement technology has been widely used in aerospace, shipbuilding, automobiles, large molds and other fields. It plays an increasingly important role in shortening the product design cycle and digesting advanced technologies and products at home and abroad. In the practical application of engineering, the point cloud data accuracy of entity shape and dimension scanning, the integrity of scanning data, CAD surface reconstruction and surface error analysis all depend on 3D measurement equipment. [0003] Among the current mainstream three-dimensional measuring equipment, there are two main...

Claims

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Application Information

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IPC IPC(8): G01B11/25G06T7/00G06T7/11G06T7/136G06T7/80
Inventor 史玉升黄奎王从军余立华李中伟秦大辉钟凯周钢
Owner HUAZHONG UNIV OF SCI & TECH
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