A Method of Extracting Feature Points of Plane Weld Based on Laser Vision System

A technology of welding seam features and extraction methods, which is applied in the field of plane weld feature point extraction based on laser vision systems, can solve problems such as being easily disturbed by the external environment, affected by industrial production, and poor real-time performance, so as to increase the degree of welding automation, Good versatility and fast effect

Inactive Publication Date: 2020-03-24
CHINA JILIANG UNIV
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Problems solved by technology

This mode has poor real-time performance, low precision, and is easily disturbed by the external environment.
Once the preset information differs from the actual position of the weld, it will have a great impact on industrial production

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  • A Method of Extracting Feature Points of Plane Weld Based on Laser Vision System
  • A Method of Extracting Feature Points of Plane Weld Based on Laser Vision System
  • A Method of Extracting Feature Points of Plane Weld Based on Laser Vision System

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Embodiment Construction

[0014] The core of the present invention is to provide a method for extracting feature points of plane welds based on a laser vision system, which effectively realizes the automatic extraction of feature points of plane welds. The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0015] Please refer to figure 1 , figure 1 It is a flow chart of a method for extracting weld feature points provided in a specific embodiment of the present invention.

[0016] The present invention will be further described below in conjunc...

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Abstract

The invention discloses a method for extracting the feature points of plane welds based on a laser vision system. The method comprises the following steps: preprocessing and morphologically operatinglaser stripe image features collected by a laser vision system to obtain a laser stripe binary image containing weld features points; designing a linear scanning method to extract the skeleton position of the laser stripe; extracting the center point of the laser stripe through a vertical scanning method on the basis, and after first fitting, eliminating error point data, and carrying out least square polynomial fitting; and finally, using a weld feature point extraction algorithm to extract the coordinate data of weld feature points on the center line of the laser stripe. The method has the characteristics of high precision, high speed, good versatility, and the like, can be widely used in the extraction of feature point information of all kinds of plane welds, and can be used in a large-noise environment.

Description

technical field [0001] The invention is based on a line laser vision system, belongs to the technical field of weld automatic detection, and relates to a method for extracting feature points of a plane weld based on a laser vision system. Background technique [0002] Welding plays a very important role in industrial production. In the current automatic welding process, the method of teaching and reproduction is mostly used, and the feature point information of the weld trajectory needs to be input in advance, and the welding equipment performs welding operations according to this information. This mode has poor real-time performance, low precision, and is easily disturbed by the external environment. Once the preset information differs from the actual position of the weld, it will have a great impact on industrial production. Therefore, the introduction of automatic identification and extraction system of weld feature points is of great significance. [0003] Currently c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00
CPCG01B11/002
Inventor 张斌常森王桔
Owner CHINA JILIANG UNIV
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