Monitoring system for web breaks in a paper machine

Details Monitoring system for web breaks in a paper machine Monitoring system for web breaks in a paper machine

D - Textiles, Paper

21

F

D21F 7/04 (2006.01) D21G 9/00 (2006.01)

Patent

CA 2298330

The invention relates to a monitoring system for web breaks in a paper machine. A web (W) is monitored by means of a number of cameras (1) and the image data of various camera positions is used for compiling focused image regions (12). Camera-specific image processing equipment (2, 12) is adapted to compile image change data by comparing the change between sequential images as far as the focused image region (12) is concerned. The image change data is compared with a normal level of image change and an alarm message (3a) is delivered if the image change level has a deviation from the reference level which exceeds a preset threshold value. A break alarm is set off, in case said alarm message (3a) is delivered by image change data comparators (3) of one or more pre-selected camera positions (P1-Pn).

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