核电站稳压器内表面堆焊层CCTV检测分辨率的影响因素

Influencing factors on resolution of CCTV inspection of the pressurizer internal surface of nuclear power plant

分析了华龙一号压水堆核电机组稳压器内表面堆焊层CCTV(闭路电视监控系统)检测过程中摄像头分辨率和放大率、照明类型、被检对象、表面状况和查扫速度等因素对检测分辨率的影响,提出可以通过提高摄像头与监视器的分辨率、采用漫反射同轴光、提供充足照明、采用足够慢的扫查速度、改善表面状况等措施提高CCTV检测分辨率;同时,采取有效的图像处理措施,可增强缺陷典型特征及分辨率,从而提高缺陷检出率。

This paper analyses the influence of factors such as camera resolution and magnification, lighting type, surface condition, and scanning speed on the inspection resolution of CCTV(closed-circuit television monitoring system) inspection of the inner surface surfacing layer of Hualong No.1 pressurised water reactor core power unit voltage regulator. It proposes to improve the CCTV inspection resolution by improving the resolution of the camera and monitor, using diffuse coaxial light and providing sufficient lighting. It also suggests to adopt sufficiently slow scanning speed, improving surface conditions and other measures. At the same time, effective image processing measures can enhance the typical characteristics and resolution of defects, so as to improve the detection rate of defect detection.