摘要
金属蒸气等离子体是真空开关电弧的基本状态,为了实现对其等离子体电子温度诊断,提高真空开关的工作性能,本文提出了基于光学方法真空开关电弧电子温度诊断技术,阐述了二比色测温的基本原理,建立了真空开关电弧实验装置及相应的CCD光学图像采集系统。利用该实验系统得到了不同波长下的电弧图像,运用MATLAB经过图像处理得到真空电弧的灰度等值曲线,形象地表达了温度场的分布;通过计算得到了电子温度在不同电流下沿着径向的分布。试验结果表明:(1)在电弧电流为8.91kA时,电子温度最高可达3.42eV;(2)电子温度沿着径向不断的降低。
A novel technique has been developed to diagnose the electron temperature of the vacuum switching arc and to improve the performance of the vacuum interrupters. The discussions centered on the hardware, including the setup of the vacuum switching arc, the filters, and a charge-coupled device （CCD） camera, capable of image acquisition and display,and the software,such as the colorimetric method and MATLAB package. The electron temperature can be evaluated by processing the filtered vacuum arc images with MATLAB, and displayed in gray-scale contour plot. The radial distributions of the electron temperatures at different currents were derived. The results of the newly developed technique show that the electron temperature maximizes to 3.42eV at a current of 8.9kA;and the electron temperature decreases in the radial directions.
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2008年第6期531-534,共4页
Chinese Journal of Vacuum Science and Technology
基金
国家重点自然科学基金(No.50537010)
关键词
真空开关电弧
电子温度
二比色
CCD
Vacuum switching arc, Electron temperature, Colorimetric, CCD
