Honeywell Oy

Juha Toivonen

Mika Valkonen

Jorma Snellman

The object of the invention is a method for synchronizing image data obtained from process monitoring cameras. By utilizing synchronization, one and the same area in a paper web can be sought as it passed the different camera positions. Since the speed are high and the webs somewhat stretching, synchronization does not often directly result in the same area being shown in the different camera positions. To facilitate search, a selection area corresponding to the limited number of sequential images in the environment of the point of synchronization of each camera position is visualized for the operator, inside which area the corresponding area in the web can be found with certainty.

Method for synchronizing image data obtained from process monitoring cameras

The invention relates to a method for monitoring a process. The image information received from cameras monitoring various positions of the process is stored in digital form and various cameras positions are alternately selected for a display and analysis on the screen of a computer. The screen is also used for displaying an image variation graph representing the image variation data of images preceding and following the image to be analyzed. The system includes selector elements ( ) for selecting a camera position representing the highest-level image variation for an automated display.

System for monitoring a process

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).

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Jyväskylä, Finland

Juha Toivonen