Web defect continuous surveillance system

Claim 2

A video surveillance system for monitoring a continuous web of material navigating a paper making machine comprising: a plurality of video cameras for the continuous monitoring of the web arranged in pairs, each of said pairs addressing a different location of interest along the paper making machine, each of said cameras being adapted to receive and operate using an external sync signal and produce a video output signal; a plurality of video image splitters each of which is for splitting the video output signal from each said pair of cameras; a plurality of video recorders each of which is for recording and playing back the split video output signals from each of said video image splitters; a plurality of video monitors each of which is for displaying a sequence of split-screen images from said each pair of video cameras; synchronization means, including synchronization signal generating means for generating a synchronization signal for the operation of all the cameras; means for receiving and responding to an independent alerting input signal indicating the occurrence of an event to be reviewed; wherein the means for responding to the alerting input signal includes means for causing the cameras and recorders to cease operation after a predetermined time and rewind the videotape in the recorders to a point corresponding to a predetermined time before the alerting input signal was received so that the event can thereafter be immediately reviewed; and control means including computer means for controlling the operation of the system.

Claim 3

The video surveillance system of claim 1 wherein the event which needs to be reviewed is a failure of the continuous web.

Claim 4

The video surveillance system of claim 1 wherein the number of said pairs of video cameras is four.

Claim 5

The video surveillance system of claim 1 wherein the synchronization means further comprises: a genlock sync generator for producing a genlock signal; a distribution amplifier connected between the genlock sync generator and the plurality of video cameras for distributing the genlock signal to all said cameras in the system.

Claim 6

The video surveillance system of claim 1 further comprising video switching means for selectively viewing the output of said each camera as a full-screen image.

Claim 7

The video surveillance system of claim 5 further comprising a video printer means for printing a recorded video frame of interest from any said camera or pair of cameras.

Claim 8

A video surveillance system for monitoring a continuous web of material navigating a paper making machine comprising: a plurality of video cameras for the continuous monitoring of the web arranged in pairs, each said pair addressing a different location of interest along the paper making machine, said each camera being adapted to receive and operate using an external sync signal and producing a video output signal; a plurality of video image splitters for splitting the video output signal from said each pair of cameras; a plurality of video recorders, one for recording and playing back the split video output signals from each of said video image splitters; a plurality of video monitors for displaying a sequence of split-screen images from said each pair of video cameras; synchronization means, including synchronization signal generating means for generating a synchronization signal for the operation of all the cameras; means for receiving and responding to an independent alerting input signal indicating a failure of the paper web; wherein the means for receiving and responding to the independent alerting input signal indicating a failure somewhere in the continuous web includes means for causing the cameras and recorders to cease operation after a predetermined time following receipt of the alerting input signal and rewind the recorders to a place corresponding to a point a predetermined time before the alerting input signal was received; video switching means for selectively viewing the output of said each cameras as a full-screen image; video printing means for printing a recorded video frame of interest from any said camera or pair of cameras; and control means including computer means for controlling the operation of the system.

Claim 9

A video surveillance system for monitoring a continuous web of material navigating a paper making machine comprising: a plurality of video cameras for the continuous monitoring of the web arranged in pairs, each said pair addressing a different location of interest along the paper making machine, said each camera being adapted to receive and operate using an external sync signal and producing a video output signal; a plurality of video image splitters for splitting the video output signal from said each pair of cameras; a plurality of video recorders, one for recording and playing back the split video output signals from each of said video image splitters; a plurality of video monitors for displaying a sequence of split-screen images from said each pair of video cameras; synchronization means, including synchronization signal generating means for generating a synchronization signal for the operation of all the cameras; means for receiving and responding to an independent alerting input signal indicating a failure of the paper web; wherein the means for receiving and responding to the independent alerting input signal indicating a failure somewhere in the continuous web includes means for causing the cameras and recorders to cease operation after a predetermined time following receipt of the alerting input signal and rewind the recorders to a place corresponding to a point a predetermined time before the alerting input signal was received; video switching means for selectively viewing the output of said each cameras as a full-screen image; video printing means for printing a recorded video frame of interest from any said camera or pair of cameras; and control means including computer means for controlling the operation of the system.