Narrow gap welding monitoring and welding line deviation detecting method based on infrared vision sensing

Abstract

The invention discloses a narrow gap welding monitoring and welding line deviation detecting method based on infrared vision sensing and belongs to the technical field of welding. An infrared vision sensing system comprises an infrared complementary metal oxide semiconductor (CMOS) camera, a filtering system, an image collecting card, a computer, a display and the like. Narrow gap welding arc light and molten pool radiation light are used as a light source, an infrared narrow belt filtering system is used for filtering interference signals and adjusting light intensity, and the computer collects and displays a welding image obtained through the infrared CMOS camera. An image capturing window is used for capturing an image away from an arc side, the image is processed, welding line deviation information is obtained by extracting a groove single-side edge, and a real-time property of welding line deviation detecting is improved while arc noise is effectively avoided. The system is simple in formation, clear in monitored image, high in welding line deviation detecting precision, strong in anti-interference capacity and good in engineering practicality and can achieve the purposes of real-time monitoring of narrow gap welding and synchronous detecting of welding line deviation.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a narrow gap welding monitoring and welding seam deviation detection method based on infrared vision sensing. Background technique [0002] Narrow gap arc welding can be divided into narrow gap metal arc welding, narrow gap submerged arc welding, narrow gap non-metal gas shielded arc welding and other processes, among which narrow gap metal arc welding (referred to as narrow gap MIG / MAG welding) has the highest utilization rate. Narrow gap MIG / MAG welding is a multi-layer welding method carried out under narrow groove conditions. Generally, it is welded in a single-pass or double-pass automatic mode per layer. It has a simple groove shape and a small weld cross-sectional area. , high welding efficiency, low energy consumption, low welding heat input, small welding heat-affected zone, and good joint toughness, etc., have obvious advantages in the welding of large thickness steel...

AI Technical Summary

Problems solved by technology

[0008] In view of the shortcomings of the existing technology, such as low sensing detection accuracy, poor monitoring effect, and single function, the present invention proposes a narrow gap welding monitoring and weld deviation detection method based on infrared CMOS visual sensing, which can monitor narrow gaps in real time The shape and dynamic behavior of the molten pool, arc and dross during the welding process, and the information of the weld deviation can be extracted to achieve the purpose of weld tracking

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