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据《世界水》1991年11期报道,一种由英国Kees Instruments仪器设备公司研制开发的微型彩电系统最近由加拿大投入使用,用以检查大坝墙体内部结构。大坝墙体检查的传统做法是获取坝体及围岩结构的岩体。然而,魁北克水电开发公司一改传统做法,继之以使用微型彩电系统来检查大坝钻孔内部的情况;围岩结构的检查同样如此,该系统由四个子系统构成。每个子系统由一架摄像机以及与之配套的摄像控制部分,即由可变换性镜头、保护装置、视频记录仪等部分构成。
According to World Water, Issue 11, 1991, a miniature color TV system developed by Kees Instruments Equipment Company of Britain was recently put into operation in Canada to check the internal structure of the dam wall. The traditional method of dam wall inspection is to obtain the rock mass of dam body and surrounding rock structure. However, Québec Hydropower developed a more traditional approach followed by the use of miniature color television systems to inspect the interior of a dam’s borehole; the same is true of the surrounding rock structure, which consists of four subsystems. Each subsystem consists of a camera and its accompanying camera control section, which consists of switchable lenses, protection devices, video recorders and other components.