紫外成像系统

Ultraviolet Imaging System

电晕放电对电力系统的危害巨大,因此有必要对电晕进行检测。电晕放电产生的紫外线波长为200-400 nm,为了实现电晕放电位置的准确定位,利用240-280 nm这一日盲波段设计了一种日盲紫外成像系统。借助高分辨力镜头、中心波长为254 nm的窄带日盲滤光片和外部采集盒,系统实现了图像采集、图像融合和图像输出的功能。在温度25℃的晴天,对10 m外的高压设备进行成像实验,获得了比较清晰的背景图像、紫外图像和融合图像。同时,在实验室里利用针尖放电模型模拟电晕放电试验,融合采集到的电晕和可见光图像。实验结果验证了系统原理的正确性。

For the harm of corona discharge to power system is great, it is necessary to detect the corona. As we all know, the ultraviolet wavelength which corona discharge emits is 200-400nm. In order to locate corona discharge accurately, a solar blind ultraviolet imaging system was designed by using the sun-blind band from 240 to 280nm. The high resolution lens, narrow band solar blind filter with the center wavelength of 254nm and external acquisition box were used to realize the function of image acquisition, image fusion and image output. An imaging experiment was went through to shoot high voltage equipment and the target far away from 10 meters on sunny day with 25℃. The background images, UV images and fusion images were acquired clearly. Likewise, another test was put forward to simulate corona discharge by the use of needle tip discharge in the lab, fusing collected corona and visible images. The experimental results indicate validity of the system.