Intelligence will become the trend of food foreign body detectors

In the process of food processing, foreign matter is often mixed. With the frequent occurrence of food foreign body injury incidents, foreign matter in food has also received more and more attention. According to the different properties and characteristics of foreign bodies in food, the food foreign body detector 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 the global requirements for food safety and export food hygiene and quality, and in order not to damage the good quality image and company reputation built up through years of hard work, preventing foreign metal objects from being mixed into food products has become a must in quality management. topic. In order to avoid the occurrence of similar incidents, food processing enterprises are also striving to improve the detection level of foreign objects in food while strengthening hygiene management, which promotes the continuous development of detection technology for foreign objects in food to a certain extent. According to the difference of detection technology and the different objects to be detected, the detection methods of food foreign body detection are mainly divided into three categories: one is the technology of detecting mixed foreign bodies in bulk products through the difference in size or weight of foreign bodies and food, due to the limitations of the technology itself , the development prospect is quite limited; the second is the technology to inspect mixed foreign matter in loose products based on shape or color analysis, which is mainly optical detection technology; the third is the technology of detecting foreign matter in food through the interaction of foreign matter and electromagnetic spectrum of partially transmitted products , such technologies such as magnetic metal detection, X-ray detection, etc. have been widely used. The earliest giant magnet placed above the food conveyor belt in the traditional integrated metal detector is the prototype of the metal detector. When the metal foreign matter in the product flows with the product on the conveyor belt, it can be absorbed by the strong attraction of the magnet. But its limitation is that it can only detect metals that are inherently magnetic. Therefore, the metal detector with more perfect performance is well used with the improvement of detection requirements. Its main detection object is metal, and metals are roughly divided into three types, namely ferromagnetic metals, non-ferrous metals and stainless steel. The difficulty of detection is determined by the magnetic permeability and conductivity of the metal itself. If the iron metal itself is magnetic and has good electrical conductivity, it is easy to be detected; if it is a non-ferrous metal such as copper, lead, and aluminum, although it is not magnetic, but has good electrical conductivity, it is relatively easy to detect; There are many kinds of stainless steel products, some are magnetic and some are not, and the electrical conductivity is not the same. 304 and 316 stainless steel products are most commonly used in the food industry, so their lower sensitivity is often used as the main detection range of metal detectors. High-performance X-ray foreign body detectors In order to better implement high standards of hygiene and quality control, X-ray foreign body detectors, which were widely used in the field of medical and safety inspections, have also begun to be better in food inspection. exert its outstanding detection capabilities. Using the strong penetrating power of X-rays and the principle of imaging, it can not only detect fine metal particles or thin lines that cannot be detected by metal detectors, but also detect non-metallic foreign objects that cannot be identified by metal detectors ( Such as glass, stone, hard bone, hard plastic, rubber, etc.), which to a large extent solves the trouble of mixing other non-metallic foreign objects in the user's products, and makes the user's product quality a new improvement. Not only that, the current X-ray foreign object detector also uses the shielding function to detect various foreign objects in metal canned products and uses the defective product detection function to detect the damage or lack of products. These functional characteristics are all metal detectors. Unattainable. In addition, in the inspection mode of the X-ray foreign body detector, the genetic algorithm (Genetic Algorithms) technology is applied to the X-ray image processing in the world, which is more effective and comprehensive for foreign body detection, and makes food more secure and safe. The intelligent detection machine introduced by Dongguan Kenwei Automation Technology Co., Ltd. to the market, this detection machine, through the combination of DSP (digital signal processor) and single-chip microcomputer, takes the lead in realizing the full digitization and intelligence of metal detection technology in China; using phase Adjustment and other new technologies and methods have solved the problems of 'product effect' that cannot be solved by metal detectors that are common in China.

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