Three-dimensional detection device and method for scanning appearance of a welding seam in high-frequency resistance welding based on linear structured light

Abstract

The invention provides a three-dimensional detection device and method for scanning the appearance of a welding seam in high-frequency resistance welding based on linear structured light. The three-dimensional detection device comprises a linear structured light sensor, a linear displacement transmission system and a computer, wherein the linear structured light sensor comprises a laser, an industrial camera and a fixed panel; and the linear displacement transmission system comprises a base, a stepping motor and a stepping motor controller. A welded object is placed on the base of the transmission system, scanning is performed by adopting the linear structured light, the industrial camera shoots a laser stripe image of the welding seam, the laser stripe image is processed through a software system to obtain three-dimensional point cloud data of the welding seam, appearance characteristics such as the width and the height of the welding seam are acquired through analysis, and thus judgment can be performed on the quality of the welding seam. The three-dimensional detection device has the advantages of high precision, safety, reliability, real-time detection and the like, improves the efficiency of welding seam quality detection and can achieve automatic detection for the welding seam quality.

Description

technical field [0001] The invention relates to three-dimensional detection, in particular to three-dimensional detection of high-frequency resistance welding seam appearance based on line structured light scanning. Background technique [0002] At present, the welding inspection ruler is mainly used to detect the welded seam of the steel bar. The welding inspection ruler is a measuring instrument for inspecting the weld width, height, welding gap, groove angle, undercut depth, etc. of the weldment by using the principles of line pattern and vernier measurement. The inspection ruler is affected by many factors in the process of use, and there will be different errors in the detection results, and manual inspection is time-consuming, laborious, and inefficient, and it is impossible to obtain real-time three-dimensional topography information of the weld surface for quality inspection. [0003] Structured light method is one of the methods of machine vision measurement, which...

AI Technical Summary

Problems solved by technology

However, there have been no reports on the use of structured light method to measure the shape of the weld. The main problem is how to quickly and accurately obtain the point cloud data of the shape of the weld. One of the reasons for this problem is that the laser The light bar image is affected by reflected light, so it is impossible to accurately determine the center position of the laser line on the weld seam

Images