Method for diagnosing non-thermal equilibrium physical characteristics of arc discharge

A non-thermal balance, physical characteristics technology, applied in the field of plasma, can solve the problems of low diagnostic accuracy and difficulty in physical characteristics diagnosis, and achieve the effect of low cost, adjustable exposure time and low price

Active Publication Date: 2018-07-20
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for diagnosing the non-thermal equilibrium physical cha

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  • Method for diagnosing non-thermal equilibrium physical characteristics of arc discharge
  • Method for diagnosing non-thermal equilibrium physical characteristics of arc discharge
  • Method for diagnosing non-thermal equilibrium physical characteristics of arc discharge

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[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0037] The invention provides a method for diagnosing the non-thermal equilibrium physical characteristics of arc discharge, using the chromaticity information of the spatial distribution of the optical image to diagnose the non-thermal equilibrium physical characteristics of the arc, and using the component distribution in the chromaticity information of the discharge arc to judge the electrode ...

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Abstract

The invention discloses a method for diagnosing non-thermal equilibrium physical characteristics of arc discharge. According to the method, an arc photograph taken by a camera is used, then an arc region of the photograph is selected, and R, G and B chromaticity information and gray scale information in the image are directly analyzed and calculated. By directly comparing DC corona and four aspects of chromaticity distribution in an arc discharge space, the chromaticity distribution of discharge arcs of different materials, the chromaticity distribution of three phases of an AC arc and the chromaticity distribution of an arc under different currents, the physical characteristics including the spatial distribution radiation characteristics of an arc, a difference in electrode materials, thecontainment of residual current or not and the change of a temperature at a thermal equilibrium position with a current change are judged. According to the method, the assumption of the thermal equilibrium state of an entire arc column region is not needed, and thus the non-thermal equilibrium characteristics of spatial distribution can be analyzed and calculated and are used as the diagnosis ofthe arc.

Description

technical field [0001] The invention belongs to the field of arc plasma, and more specifically relates to a method for diagnosing the non-thermal equilibrium physical characteristics of arc discharge by using the chromaticity information of the spatial distribution of optical images. Background technique [0002] Arc discharge is a strong self-sustaining discharge in gas discharge, which produces a large amount of plasma and is accompanied by intense photothermal phenomena. Arc has broad application prospects in welding, rectification, lighting, heating, etc. Accurate characterization of the spatial characteristics of arc is a necessary requirement for arc industrial applications. For the power system, the hazards caused by the arc will cause huge economic losses and casualties, and the ability to accurately identify the state and characteristics of the arc has become a top priority. [0003] Experimental research on electric arc mainly focuses on electrostatic probe method...

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Application Information

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IPC IPC(8): G01R31/12G06T7/90
CPCG01R31/1218G01R31/1281G06T7/90
Inventor 叶齐政王玉伟董轩
Owner HUAZHONG UNIV OF SCI & TECH
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