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中文摘要：
通过对针板电晕放电实验，得到发光图像，并针对发光图像，描述了电晕层形貌。利用photoshop软件读取发光照片数据，测量出电晕层的灰度值和厚度。结果表明，在放电起晕后电晕发光强度在层内相对均匀，随着放电电压增大，在针尖处会产生一个明亮而不均匀的区域。发光强度随距针尖距离的变化规律为首先缓慢减小，然后迅速减小，最后又变得缓慢减小。当电晕区不同定点出现发光后，其发光强度随电压的增大表现出近似线性增强的趋势。起晕后电晕层厚度快速增长，随后会出现一个稳定区，当电压继续增大，电晕层厚度由平直向上升发展。
英文摘要：
In the experimet the images of needle-plate corona discharge are obtained. The gray value and thickness of corona layer was measured by reading luminescence data using photoshop software. The result shows that corona luminous intensity is relatively uniform after corona. With the discharge voltage increasing, a bright and uneven area is created in the tip place. With the increase of needlepoint distance, luminous intensity initially de- creased slowly, following diminished rapidly and finally declined slowly. When corona area appeared luminous at different points, its intensity approximate linearly increases with the increase of the voltage. The thickness of corona layer rapidly grew, then there would be a stable region, with the increase of voltage, thickness of corona layer developed from fiat to ascending.
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