【摘要】 设计了紫外光谱成像仪CoroCAMⅣ+与虚拟仪器编程环境Labview8.0相结合的电晕放电测试和分析平台。选用适当的数字图像处理算法和流程,通过对实时记录的电晕放电紫外视频图像处理,定义成像仪观测范围内"放电区域紫外成像面积百分比"作为量化电晕放电强度的表征参数。在近似标准大气条件下,研究了基于紫外图像处理的棒—板间隙工频电压作用下的电晕放电,结果表明,文中所述紫外数字图像处理流程可对紫外成像仪观测到的电晕放电图像真实还原,从而保证所选电晕放电量化表征参数的有效性;表征参数可明确反映起晕情况和电晕放电发展的阶段;得到电晕放电紫外成像随观测距离的衰减规律,提出电晕放电紫外成像检测法的应用判据。更多还原

【Abstract】 A platform is designed that combines CoroCAM Ⅳ+ with the virtual instrument programming environment Labview 8.0 for evaluating and analyzing the development of corona discharges.With an appropriate algorithm and flowchart for digital image processing,the area percentage of the UV image within the discharging region is defined as the characterizing parameter of quantifying the intensity of corona discharge by processing the UV video of corona discharge recorded in real time.Under the approximate standard atmospheric ambient,a study is made on corona discharge under the power frequency voltage of the rod-plane gap based on the UV digital image processing.The results show that the flowchart of the digital image processing proposed can reproduce the images observed by the UV camera so as to guarantee the validity of the quantifying parameter of corona discharge;the characterizing parameter can distinctly reflect the corona discharge developing stages;the law of the UV imaging of corona discharge attenuating with the observation distance is obtained;the standard conversion method—the criterion for the UV imaging detection of corona discharge is proposed.更多还原