Three-dimensional bent-pipe multi-camera visual inspection method and system thereof

A multi-camera vision and detection method technology, applied in image data processing, instruments, calculations, etc., can solve the problems of complex operation and low measurement efficiency, and achieve the effect of easy operation and rapid detection

Active Publication Date: 2014-09-10
新拓三维技术(深圳)有限公司
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Problems solved by technology

[0003] At present, pipe bending factories mostly use some simple measuring tools or three-coordinate measuring instruments for pipe bending measurement. Although these measurement methods have certain accuracy, the operation is complicated and the measurement efficiency is low.

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  • Three-dimensional bent-pipe multi-camera visual inspection method and system thereof
  • Three-dimensional bent-pipe multi-camera visual inspection method and system thereof
  • Three-dimensional bent-pipe multi-camera visual inspection method and system thereof

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] The present invention proposes a multi-camera visual inspection method for three-dimensional bent pipes. The basic measurement process is as follows: figure 1 shown. Taking ten-camera measurement as an example, when performing three-dimensional visual inspection of bent pipes:

[0026] Step S1, multi-camera calibration: arrange multiple marker points in the measurement field of view, and perform global calibration on the internal parameters and external parameters of multiple cameras. The marker points include circular coded marker points and circular non-coded marker points .

[0027] Taking the ten-camera measurement as an example, the global calibration of the internal and external parameters of the 10 cameras is realized by arranging multiple marker points in the measurement field of view. The layout of the 10 cameras is as follows: figure 2 sh...

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Abstract

The invention discloses a three-dimensional bent-pipe multi-camera visual inspection method and a system thereof. The method comprises a step S1 of multi-camera calibration, a step S2 of bent-pipe image acquisition, a step S3 of bent-pipe edge identification, a step S4 of two-dimensional bent-pipe center line detection, a step S5 of two-dimensional bent-pipe center line reconstruction, and a step S6 of bent-pipe parameter calculation. Due to the operation steps, a quick and accurate measurement method is provided for the dimension detection of a machined bent pipe, and the method is not only convenient to operate and high in automation degree, and also accurate and reliable in measurement results.

Description

technical field [0001] The invention relates to the problem of three-dimensional detection of curved pipes in the field of mechanical processing, in particular to a multi-camera visual detection method for three-dimensional curved pipes. Background technique [0002] Because of its advantages of light weight, high strength and easy processing, bent pipes are widely used in automobiles, home appliances, sports equipment, military and aerospace industries, such as automobile exhaust pipes, home improvement railings, bicycles and other curved parts. In the actual production process, how to quickly and accurately measure the processed bent pipe to verify whether it can meet the design requirements is very important. [0003] At present, pipe bending factories mostly use simple measuring tools or three-coordinate measuring machines to measure pipe bends. Although these measurement methods have certain accuracy, the operation is complicated and the measurement efficiency is low. ...

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Application Information

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IPC IPC(8): G06T7/00
Inventor 唐正宗胡浩李磊刚郭翔
Owner 新拓三维技术(深圳)有限公司
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