Vision-based identification and locating method for outer beam holes in multilayer beam

A positioning method, Chinese and foreign technologies, applied in character and pattern recognition, instruments, calculations, etc.

Active Publication Date: 2017-05-31
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a vision-based identification and positioning method for the middle and outer beam holes of multi-storey beams, which can be automatically identified by robot vision, thus solving the identification of the size of the middle and outer beam holes of multi-storey beams and positioning technical issues

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  • Vision-based identification and locating method for outer beam holes in multilayer beam
  • Vision-based identification and locating method for outer beam holes in multilayer beam

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0022] figure 1 It is a flowchart of the identification and positioning method constructed according to the preferred embodiment of the present invention; figure 2 It is a schematic diagram of a device for identifying and locating outer beam holes constructed according to a preferred embodiment of the present invention. like figure 1 and 2 Shown, the concrete implementation process of the p...

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Abstract

The invention belongs to the field of machine vision and detection, and discloses a vision-based identification and locating method for outer beam holes in a multilayer beam. The method comprises the steps of (a) calculating a conversion coefficient for converting an actual size into a pixel size; (b) selecting a generation template in a to-be-identified outer beam hole of the multilayer beam, performing template matching on a to-be-identified image, obtaining a size type of the hole, intercepting a new local image by taking an optimal matching point as a center, and performing sub-pixel precision-level edge detection on the new image; and (c) fitting central coordinates of the hole by using edge point data, and performing multiplication by the conversion coefficient to obtain the central coordinates of the to-be-identified outer beam hole of the multilayer beam, thereby realizing the identification and locating of the hole. Through the method, automatic blind hole identification and locating of the outer beam holes in the multilayer beam are realized, the labor intensity of workers is reduced, the machining precision of the outer beam holes and the riveting quality of the multilayer beam are improved, and the production efficiency is improved by multiple times.

Description

technical field [0001] The invention belongs to the field of machine vision and detection, and more specifically relates to a vision-based identification and positioning method for inner and outer beam holes in multi-layer beams. Background technique [0002] Multi-story beams, especially double-deck beams, are a common large load-bearing structure. Multi-layer beams are riveted by multiple pieces of single-layer beams. Compared with single-layer beams, multi-layer beams have higher strength, so they are widely used in automobile frames, bridges, large truss buildings and other load-bearing structures. In order to reduce or even eliminate the dislocation of the holes to be riveted and improve the quality of multi-layer beams, the multi-layer beam hole matching process puts forward high requirements on the center coincidence degree and hole diameter error of the holes to be riveted on each single-layer beam. For example, the double-layer steel beams used in commercial vehicl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/46
CPCG06V20/10G06V10/443
Inventor 罗欣郭晓阳
Owner HUAZHONG UNIV OF SCI & TECH
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