Engilico has solved the problem by harnessing the power of hyperspectral imaging , which analyses a wider light spectrum than just the visible range to include near-infrared frequencies . Infrared waves are able to penetrate plastic film and as different materials react uniquely to infrared light , they can be reliably detected based on their specific properties of transmission , reflection and absorption of these wavelengths . The spectrum of each pixel in the acquired image is analysed to provide information about chemical composition . Any undesired materials in the plastic seal area such as meat , fat
Engilico ’ s hyperspectral system is installed over an existing or its own conveyor belt and inspects every individual package at a rate of up to 160 per minute .
or oil can be detected in high contrast , even through an opaque top film , and is shown on the control screen in a different colour .
It is noteworthy that hyperspectral imaging is perfect for this quality control process . Shorter electromagnetic wavelengths from the other side of the visible spectrum , such as X-rays , are good for seeing metal parts , for example , but have too much penetrating power to resolve materials whose density difference is small , such as plastic and food .
Typical applications are 100 % inspection of trays containing meat , cheese , fruits , ready meals and snacks . Investment in an automated quality control system directly integrated at the end of a food production line pays for itself quickly , as it minimises the production of faulty product and automatically rejects any packages that have passed through with an unsatisfactory seal . Additionally , the costs associated with line stoppage , manual re-packaging , food wastage and machine cleaning are avoided .
Failure to detect contamination in a seal is a serious issue , as if the package finds its way onto a supermarket shelf , air ingress and leakage would render the consumption date advice on the label irrelevant . Even worse , it could result in health issues for the consumer . In either case , an expensive product recall and potential brand damage are likely .
Engilico ’ s hyperspectral system is installed over an existing or its own conveyor belt and inspects every individual package at a rate of up to 160 per minute . HyperScope instantly recognises package orientation , processes the image and analyses the seal quality , the information being displayed on an operator-friendly touch screen . All production-related data such as product type , number of good / bad packages , date and time is saved for subsequent production quality analysis . In general , in-line seal inspection enables customers to realise better packaging quality , higher packaging productivity , end-of-line automation and a reduction in manual inspection .
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