Challenge: Detecting foreign bodies at an early stage - MultiCheck winner of the Seifriz Prize
Foreign bodies such as plastic splinters must not get into food. If they do end up in food during production, manufacturers must take back or recall their contaminated products. CLK GmbH, as a specialist in industrial image processing, has developed an optical system for foreign object detection, the MultiCheck. In contrast to X-ray and metal detection methods, MultiCheck detects contaminants by their colour. In principle, control parameters such as shape and size are also possible. This makes the system a compelling complement to the other two concepts for foreign object detection, because no system alone, and certainly not a visual inspection by workers, can offer 100% safety. Multihead weighers in the production can be easily retrofitted with the MultiCheck without much effort.
How it works:
As soon as the multihead weigher drops an amount of product, the MultiCheck receives a signal that triggers the capturing of a sequence of images. Several cameras take pictures simultaneously from different positions. If the system finds a foreign body made of plastic and other materials in the product stream based on its colour, it generates a signal to stop the line or, optionally, to eject the affected portions. The MultiCheck additionally contributes to improving the competitiveness of the companies. By now, a patent has been granted for the MultiCheck.