Kenwei is a global professional manufacturer which specialized in weigher packing machines and multi-head weigher machines.

Intelligent will become the trend of food foreign

by:Kenwei      2020-05-29

In the process of food processing, foreign matter is often mixed. With the frequent occurrence of food foreign body injury incidents, debris in food has also received more and more attention. According to the different properties and characteristics of foreign objects in food, the food foreign body detection machine has a variety of detection technologies such as magnetic metal detection, visible light detection, near infrared light detection, ultraviolet light detection, nuclear magnetic resonance detection, ultrasonic imaging detection and X-ray detection. With the gradual improvement of global food safety and hygienic and quality requirements for exported food, in order not to damage the good quality image and company reputation established over many years of efforts, it is necessary to prevent metal foreign bodies from being mixed into food products. topic. In order to avoid the occurrence of similar incidents, while strengthening the sanitation management, food processing enterprises are also striving to improve the detection level of food foreign bodies, which has promoted the continuous development of food foreign body detection technology to a certain extent. According to the difference in detection technology and the detected objects, the detection methods of food foreign body detection are mainly divided into three categories: First, the technology of detecting mixed foreign bodies in bulk products through the size and weight of foreign bodies and food, due to the limitations of the technology itself , The development prospect is quite limited; the second is to check the mixed foreign objects in loose products based on shape or color analysis technology, which is mainly optical detection technology; the third is to detect the foreign objects in food through the interaction of foreign objects and the electromagnetic spectrum of partially transmitted products This type of technology, such as magnetic metal detection and X-ray detection, has been widely used. Traditional integrated metal detector The earliest giant magnet placed above the food conveyor belt is the prototype of the metal detector. When the metal foreign objects in the product can be attracted by the strong attraction of the magnet as the product flows on the conveyor belt, its limitation is only Can detect metals with magnetic properties. Therefore, the metal detector with more complete performance is well used as the detection requirements increase. Its main detection object is metal, and the metal is roughly divided into three types, namely ferromagnetic metal, non-ferrous metal and stainless steel. The difficulty of detection is determined by the magnetic permeability and conductivity of the metal itself. If the ferrous metal itself is magnetic and has good conductivity, it is easy to be detected; if it is non-ferrous metals such as copper, lead, aluminum, etc., although it does not have magnetism itself, but the conductivity is good, it is relatively easy to detect relatively; There are many kinds of stainless steel products, some are magnetic and some are not magnetic, and the electrical conductivity is also different. The most commonly used in the food industry are 304 and 316 stainless steel products, so their minimum sensitivity is often used as the main detection range of metal detectors. High-performance X-ray foreign object detector In order to better implement high standards of hygiene and quality control, X-ray foreign object detectors, which were widely used in medical and safety inspections, have also begun to give full play to their outstanding detection capabilities in food inspection. Using the strong penetrating power of X-ray and the principle of imaging, it can not only detect fine metal particles or fine lines that cannot be detected by metal detectors, but also detect non-metallic foreign objects that metal detectors cannot recognize ( Such as glass, stone, hard bone, hard plastic, rubber, etc.), which largely solves the trouble of mixing other non-metallic foreign objects in the user's products, so that the user's product quality has been improved. Not only that, the current X-ray foreign object detection machine also uses the shielding function to detect various foreign objects in metal canned products and uses the defect detection function to detect product damage or lack. These functional features are all metal detection machines. Unprecedented. In addition, in the inspection mode of the X-ray foreign object detection machine, the world's first application of genetic algorithm (Genetic Algorithms) technology to X-ray image processing is more effective and comprehensive for foreign object detection, making food safer and safer.                                

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