15 September 2018
It uses millimetre waves to scan products and detect contamination as well as deviations in the production process. The technology is capable of inspecting frozen products, baked goods, and hollow as well as filled products. Millimetre wave sensors take their measurements based not only on the attenuation of the signal during the scan but also on the changes of the signal’s transit time caused by inclusions. Combined with an automatic image analysis process, the resulting system is able to scan packaged goods for contaminants and detect deviations in homogenous production processes. Furthermore, thanks to the ability to measure residual moisture, the system is particularly well suited for the monitoring of drying processes. Unlike x-ray technology, the processes can be applied directly without any additional radiation protection measures. They can also provide a stronger contrast ratio, particularly for plastic contaminants.
Up to now, the most common technique for product inspections in the food industry besides x-ray are optical systems such as hyperspectral cameras. For the most part, these systems only capture measurement readings on product surfaces. By combining them with high frequency sensors, it is possible to examine packaged goods and detect contaminations inside products. The process can be adapted to the most diverse products to deliver optimized customer-specific results, being especially suitable for dried and frozen food. System development is focused on the ability to integrate these sensors into existing plants.
The Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR conducts research in the area of radar technology whereas the Fraunhofer Institute of Optronics, System Technologies and Image Exploitation IOSB develops multi-sensor systems. For both, quality inspection and quality assurance are important fields of application.
https://www.fhr.fraunhofer.de/
https://www.iosb.fraunhofer.de/
“FoodInSpector”: sensor system detects contaminants
Time and again, food contamination from materials such as plastics and glass leads to costly recall campaigns. Two research centres in Germany, the Fraunhofer Institutes IOSB and FHR, develop multi-sensor concepts to detect contaminants in products. The “FoodInSpector” sensor system is designed for the quality control of food.
 Photo: Fraunhofer FHRFoodInSpector is able to scan packaged food and check a series of parameters. |
Up to now, the most common technique for product inspections in the food industry besides x-ray are optical systems such as hyperspectral cameras. For the most part, these systems only capture measurement readings on product surfaces. By combining them with high frequency sensors, it is possible to examine packaged goods and detect contaminations inside products. The process can be adapted to the most diverse products to deliver optimized customer-specific results, being especially suitable for dried and frozen food. System development is focused on the ability to integrate these sensors into existing plants.
The Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR conducts research in the area of radar technology whereas the Fraunhofer Institute of Optronics, System Technologies and Image Exploitation IOSB develops multi-sensor systems. For both, quality inspection and quality assurance are important fields of application.
https://www.fhr.fraunhofer.de/
https://www.iosb.fraunhofer.de/
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