Web defect continuous surveillance system

摘要

A video surveillance system for monitoring a continuous web of material negotiating the tortuous path through a paper making machine employs a plurality of video cameras for the continuous monitoring of the web arranged in pairs, each pair addressing a different location of interest along the paper making path. All of the cameras are operated using a single external sync signal and produce video output signals which, in turn, are fed to a plurality of video image splitters, each splitting the video output from a pair of cameras. Video recorders are provided for recording and playing back the split video output signals from each video image splitter through video monitors. The system is computer controlled and responsive to input signals indicative of web failure.