The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 2002
Filed:
Apr. 12, 1999
Juha Toivonen, Jyväskylä, FI;
Jorma Snellman, Parviaisentie, FI;
Mika Valkonen, Terveyskatu, FI;
Honeywell Oy, , FI;
Abstract
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 ( ) and the image data of various camera positions is used for compiling focused image regions ( ). Camera-specific image processing equipment ( ) is adapted to compile image change data by comparing the change between sequential images as far as the focused image region ( ) is concerned. The image change data is compared with a normal level of image change and an alarm message ( ) 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 ( ) is delivered by image change data comparators ( ) of one or more pre-selected camera positions (P -Pn).