Visual detection device and method for wire rods without tension constraint

A visual inspection device and tension-free technology, which is applied in measurement devices, material analysis, material analysis by optical means, etc., can solve problems such as not taking into account, ensure consistent imaging resolution, realize surface quality inspection, and realize surface quality inspection. The effect of visual inspection

Inactive Publication Date: 2016-03-30
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

However, none of the related patents takes into account the adjustment method of keeping the resolution of the imaging system constant when the measured object specification changes and there is no tension constraint.

Method used

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  • Visual detection device and method for wire rods without tension constraint
  • Visual detection device and method for wire rods without tension constraint
  • Visual detection device and method for wire rods without tension constraint

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] see Image 6 with Figure 14 , a device for visual detection of wire rods under no tension constraints, including several cameras 1, the cameras 1 are installed on the sliding guide rail 3, the sliding guide rail 3 is fixed on the fixed plate 4, and the sliding guide rail 3 is along the circumference of the hollow guide groove 2. Distribution, when the detected wire 5 passes through the hollow guide groove 2, each camera 1 images the outer surface of the wire 5, and the cameras 1 are evenly arranged on a circle centered on the outer circular center of the cross-section of the detected wire 5, and the cameras 1 The imaging distance is equal to the detected wire 5; when the specification of the wire 5 changes, the position of the camera 1 is adjusted along the sliding guide rail 3 to keep the imaging distance between the camera and the de...

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Abstract

The invention relates to the field of machine vision technology, in particular to a surface quality detection device and method for tubes, rods and wire rod products in the iron and steel industry without tension constraint. The visual detection device for wire rods without tension constraint includes a plurality of cameras (1) mounted on a sliding guide rail (3), the sliding guide rail (3) is fixed on a fixed plate (4) and is circumferentially distributed along the periphery of a hollow guide slot (2), when a detected wire rod (5) passes through the hollow guide slot, the cameras image the outer surface of the wire rod, the imaging distances between the cameras and the detected wire rod are equal; and when the wire rod specification changes, cameras perform position adjustment along the sliding guide rail to keep the imaging distances between the cameras and the detected wire rod equal. The device and the method provided by the invention can realize automatic adjustment of camera imaging distance so as to achieve focusing, thus ensuring clear imaging of the detection system under the circumstance of constant resolution.

Description

technical field [0001] The invention relates to the technical field of machine vision, in particular to a surface quality detection device and method for tubes, rods and wire products in the iron and steel industry under no tension constraints. Background technique [0002] In product surface quality inspection, inspection systems based on machine vision technology are widely used. The surface quality inspection of tubes, rods, and wire products is quite different from other flat and rotating products in terms of light source arrangement and imaging methods because of their circular outer surfaces, especially the diameter specifications of such products change. When , the relative distance between the circular surface and each imaging device changes, in order to ensure clear imaging, the camera focal length or imaging distance needs to be adjusted. [0003] At present, only a few units in the world are engaged in the research and development of such products, such as OG Com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/952
Inventor 彭铁根唐劲松何永辉张杰宗德祥杨水山
Owner BAOSHAN IRON & STEEL CO LTD
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