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A monocular vision measurement method for large parts

A measurement method and technology for large parts, applied in the field of measurement, can solve the problems of limited measurement range and inability to complete the measurement of large parts to be measured, and achieve the effect of overcoming the limitation and expanding the range of measurement

Inactive Publication Date: 2016-11-23
HENAN UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a monocular vision measurement method for large parts to solve the problem that the measurement range of the current monocular vision measurement is limited so that it is impossible to measure all the points to be measured in the large parts

Method used

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  • A monocular vision measurement method for large parts

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Embodiment Construction

[0029] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0030] Embodiment of a monocular vision measurement method for large parts of the present invention

[0031] The monocular vision measurement method for large parts of the present invention accurately extracts the central coordinates of the mark points by reasonably setting the mark points, and realizes the measurement of the camera through the transfer station ball on the auxiliary target, expands the scope of measurement, and realizes the measurement of large parts. Fast, low-cost measurement requirements. The measurement system used in the present invention is as figure 1 As shown, including camera 6, computer and auxiliary measurement target, wherein the auxiliary measurement target is as figure 2 As shown, it includes the measuring rod 1, the rotating station ball 2 is installed on the measuring rod 1, the rotating station platform 3...

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Abstract

The invention relates to a monocular vision measuring method for large parts, and belongs to the technical field of measuring. According to the monocular vision measuring method for the large parts, planning analysis is carried out on the optimal point of sight of a part to be tested by adopting a video camera shifting method, limitation of one-time measuring of the video camera is overcome, and the measuring range is enlarged. After the video camera finishes measurement in an effective field of view, the video camera is moved to another position, the fact that the pose of a shifting ball does not change is guaranteed, a measuring bar is rotated to enable the face, posted with a marking point, of the measuring bar to directly face the video camera, the rotating angle of the measuring bar is recorded, the mutual relation before the shifting and after the shifting can be obtained through the shifting ball and marking holes in the shifting ball, space splicing can be carried out on multiple sets of coordinate values through the mutual relation before the shifting and after the shifting, and reconstitution on the three-dimensional shape of a large part by using an existing instrument is achieved.

Description

technical field [0001] The invention relates to a monocular vision measurement method for large parts, belonging to the technical field of measurement. Background technique [0002] In recent years, large-sized curved surfaces have been widely used in the automotive industry, ship and spacecraft shapes, etc. With the development of modern processing and manufacturing and production operations, the measurement of three-dimensional geometric dimensions of large parts has become an important part of modern reverse engineering and product digital design. And the basic support technology of manufacturing, and more and more fields such as assembly, quality control, online inspection, tooling positioning of industrial products, etc. also urgently need to solve the three-dimensional measurement of large parts. [0003] With the improvement of computer technology, electronics, and optical technology, as well as the continuous advancement of image processing, pattern recognition and o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24
Inventor 李航司东宏刘丽丽王想到付林伯刘志威张伟孙景文
Owner HENAN UNIV OF SCI & TECH
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