An in-situ observation method for gas arc electrode splashing ablation

Abstract

The invention relates to an in-situ observation method for gas arc electrode sputtering ablation, which comprises the following steps of: irradiating the surface of an electrode by adopting high-powerlaser, and filtering arc light by utilizing a narrow-band filter to obtain an image for representing an electrode sputtering ablation behavior in an arc combustion process; using a Gaussian-Laplacianedge operator to filter the original image to achieve complete separation of arc light and an electrode, and obtaining the edge of the splashing liquid drop; Reconstructing the splashing liquid dropand extracting position and shape information of the splashing liquid drop based on an image gray threshold binaryzation method, and obtaining a motion track of the splashing liquid drop through framesuperposition; And obtaining the spatter ablation rate based on a multi-target particle matching algorithm. Through the combination of an optical imaging means and a digital image processing technology, visualization and in-situ measurement of the electrode ablation behavior in the arcing process are achieved, testing of the gas arc ablation behavior is expanded, the method provides a direct anduseful scientific basis for in-depth and complete understanding of the gas arc-electrode mechanism and the process of sputter ablation..

Description

technical field [0001] The invention belongs to the technical field of arc plasma testing, and in particular relates to an in-situ observation method of gas arc electrode sputtering ablation based on digital image processing technology. Background technique [0002] The arc plasma formed by electrode discharge can be used in many industrial fields such as arc welding, plasma torch cutting, plasma spraying, and switching appliances. However, the ablation phenomenon of the electrode will shorten the service life of the electrode and affect the arc discharge behavior. Especially in the field of switching devices, the ablation of the electrodes will seriously affect the life of the switching device and restrict the improvement of the breaking capacity of the switching device. [0003] In switching appliances, the ablation of electrodes can be divided into two main forms: metal evaporation and droplet splashing. During the combustion process, the arc will continuously inject ene...

AI Technical Summary

Problems solved by technology

[0006] In view of the above deficiencies and defects, the purpose of the present invention is to provide an in-situ observation method of gas arc electrode sputtering ablation based on digital image processing technology, which can clearly image and observe the movement process of splashed liquid droplets, and solve the problems in the past. The problem of not being able to clearly image and dynamically measure the sputtering ablation characteristics of the electrode during the arcing process

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