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A multi-camera visual inspection method and system for three-dimensional bent pipe

A technology of multi-camera vision and detection methods, 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: 2017-06-09
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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  • A multi-camera visual inspection method and system for three-dimensional bent pipe
  • A multi-camera visual inspection method and system for three-dimensional bent pipe
  • A multi-camera visual inspection method and system for three-dimensional bent pipe

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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 elbows. The basic measurement process is as follows: figure 1 shown. Taking ten-camera measurement as an example, when performing 3D visual inspection of elbows:

[0026] Step S1, multi-camera calibration: arranging a plurality of marker points in the measurement field of view, and performing global calibration on the internal parameters and external parameters of the multiple cameras, the marker points include a ring-shaped coding marker point and a circular non-coding marker point .

[0027] Taking ten-camera measurement as an example, the global calibration of the internal and external parameters of ten cameras is achieved by arranging multiple marker points in the measurement field of view. figure 2 shown. The markers used include circular coded marker...

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/13G06T7/70G06T7/80
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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