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Line laser sensor and method for calculating three-dimensional coordinate data of line laser sensor

A technology of three-dimensional coordinates and line laser, which applies online laser sensors and the calculation of three-dimensional coordinate data. In the field of welding, it can solve the problems of poor welding seam size accuracy and difficult application of teaching and reproduction technology.

Inactive Publication Date: 2015-12-16
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

However, when the workpiece size is large, the shape is complex and irregular, or the weld seam size accuracy is poor, the teaching reproduction technology is difficult to apply

Method used

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  • Line laser sensor and method for calculating three-dimensional coordinate data of line laser sensor
  • Line laser sensor and method for calculating three-dimensional coordinate data of line laser sensor
  • Line laser sensor and method for calculating three-dimensional coordinate data of line laser sensor

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Embodiment

[0037] like figure 1As shown, it is a structural composition diagram of a line laser sensor for automatic welding equipment. The sensor is composed of a line laser emission module 9, an image acquisition module 16, and an image processing and control module:

[0038] Line laser generator module 9 has a power of 30mW and is composed of a semiconductor laser generator and a Powell linear prism to generate a line laser with a wavelength of 650nm;

[0039] The image acquisition module 16 includes an ACA type CMOS black and white industrial camera 10, an M0814 type fixed-focus lens 11 and a 30mm diameter filter 12 for image acquisition.

[0040] The image processing and control module includes a control circuit, an operating system and a control system.

[0041] The main units of the control circuit are: output Gigabit Ethernet interface 1; LED indicator light 2; DM3730 dual-core processor 3 of American TI Company, integrating 1GHz ARM CortexTM-A8 core and 800Hz DSP core; 512MB32...

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Abstract

The invention discloses a line laser sensor, which can measure three-dimensional coordinates of a profile of a welding line in real time. The line laser sensor is characterized in that the device includes three parts, i.e., a line laser generation module, an image acquisition module and an image processing and control module. The line laser generation module performs line laser marking on the profile of the welding line, and the image acquisition module collects and outputs a line laser marked image. The image processing and control module receives light laser marked image data, performs image processing of enhancing, filtering, binaryzation and feature extraction, extracts image feature data required by calculation, and calculates three-dimensional coordinate data of the profile of the welding line according to the feature data, thereby achieving the goal of performing three-dimensional measurement on the profile of the welding line. The line laser sensor provided by the invention has the advantage that three-dimensional measurement accuracy reaches + / - 0.1mm.

Description

technical field [0001] The present invention relates to a welding technology, in particular to a line laser sensor and a calculation method for three-dimensional coordinate data. The present invention is suitable for the application of non-contact three-dimensional measurement of weld seam contour by using laser vision measurement technology in automatic welding field. Background technique [0002] With the continuous expansion of the production scale of the automobile, machinery and other industries, the accuracy and efficiency of welding must also be continuously improved. However, due to the harsh working environment of welding, high work intensity, and high technical requirements for workers, fewer and fewer people are willing to engage in manual work. In the welding industry, in order to meet the needs of the manufacturing industry, automation and intelligence are the inevitable trend of the development of welding technology. Most of the current automatic welding syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
Inventor 邹焱飚龚国基
Owner SOUTH CHINA UNIV OF TECH
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