Laser vision sensing system and method for welding seam tracking

A visual sensing and laser technology, which is applied in the field of laser visual sensing system, can solve problems such as irregular laser stripes and broken lines, failure to extract the center point of the weld seam, loss of weld seam tracking function, etc., to improve continuity and accuracy, Improve welding efficiency and reduce the effect of manual intervention

Active Publication Date: 2022-04-12
SHANGHAI DIANJI UNIV
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Problems solved by technology

However, when a single laser marker irradiates the workpiece, only the central feature point of the weld can be identified, and the obtained weld information is limited. In addition, when encountering a cross-butt weld in civil air defense projects, the projected laser stripes and broken lines are irregular and cannot Extract the seam center point, lose the seam tracking function

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  • Laser vision sensing system and method for welding seam tracking
  • Laser vision sensing system and method for welding seam tracking
  • Laser vision sensing system and method for welding seam tracking

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0031] specifically, figure 1 A schematic diagram of a laser vision sensing system for seam tracking provided by an embodiment of the present invention, figure 2 The broken line schematic diagram of the boundary position provided for the embodiment of the present invention, such as figure 1 and figure 2 As shown, the system includes: a workpiece 1, a composite filter 3, a CCD camera 4, a side laser marking device 2 and a rear laser marking device 5, and the side laser marking device 2 and the rear l...

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Abstract

The invention provides a laser vision sensing system and method for welding seam tracking, the system comprises a workpiece, a composite optical filter, a CCD camera, a side edge laser line marker and a rear laser line marker, the side edge laser line marker and the rear laser line marker are placed on two sides of the CCD camera to obliquely irradiate; laser stripes emitted by the side laser line marker and the rear laser line marker are projected on a workpiece and collected to the CCD camera through the composite optical filter, welding seam information and offset are obtained after image processing, and the spatial position of a welding seam is judged. The laser vision sensing system and method for welding seam tracking are used for welding seam space position identification and welding seam tracking during automatic welding, and the welding quality can be improved.

Description

technical field [0001] The invention relates to the technical field of seam tracking, in particular to a laser vision sensing system and method for seam tracking. Background technique [0002] At present, most of the butt welds of civil air defense projects in China still use manual welding, which has the problems of harsh working conditions and high work intensity. At the same time, the weld shape, welding efficiency and welding quality need to be improved. Welding automation technology is widely used in industrial production due to its excellent work efficiency. It is an inevitable trend in the development of welding technology and an important means to achieve safer, more efficient and intelligent production. [0003] At present, the sensors used in automatic welding are mainly arc sensors, mechanical sensors and visual sensors. The arc sensor directly extracts the welding seam position deviation signal from the welding arc itself, and does not need to attach any device ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/127
CPCY02P90/30
Inventor 钱炳锋高世杰
Owner SHANGHAI DIANJI UNIV
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