Publish Time: 2022-12-23 Origin: Site
The metal detector is an indivisible instrument for human beings because it can be the first step for our food safety. Food is an indispensable material resource in people's lives, and its quality directly affects people's quality of life and health. Our lives are inseparable from food, and now more and more food safety issues threaten our quality of life and health. Therefore, we must pay attention to the safety of food safety. The emergence of metal detectors will undoubtedly help us eliminate our concerns about food safety. Next, let's take a look at the features of the metal detector. Here are some answers.
Here is the content list:
l The metal detector is an important metal impurity detection equipment in the food industry.
l Can the metal detector detect metal objects of multiple sizes?
The metal detector is an important metal impurity detection equipment in the food industry. It can detect metal impurities and raw materials in food to ensure food safety and protect consumers' health. During the implementation of the HACCP process, the production process of the metal detector was determined as a critical control point. In the food industry, metal detector systems usually use higher operating frequencies. For foods such as cheese, the high-frequency signal response increases proportionally due to its inherent high-frequency induction properties. Moist fat or salt substances, such as bread, cheese, sausages, etc., have the same conductivity as metals. In this case, to prevent the system from sending out false signals, the compensation signal must be adjusted to reduce sensitivity.
The sensitivity of the metal detector depends on two factors: the aperture size and the operating frequency. The smaller the aperture size, the higher the sensitivity of the probe. For example, a 50mm high aperture will be able to detect metal objects of only 0.5mm. Secondly, the higher the frequency, the higher the sensitivity. However, increasing the frequency does not automatically mean an increase in the detection capability, because it may cause the food itself to produce a strong signal to the metal detector, which is also called a product effect. Therefore, our goal is to determine the highest frequency that does not cause failure. In this way, the metal detector can detect pollutants and false alarms, thereby avoiding product waste.
To obtain the best results, the specific test parameters of each product to be inspected should be determined, recorded, and retained automatically. The industry standard to verify the performance of the metal detector is the size of the various metal balls detected by the detector. But in reality, the shape of the contaminant may be a metal wire or metal plate debris. They send different signals to the detector according to the position in the detector aperture (the so-called azimuth effect). It is often used in machinery. However, as long as the detectors work well, they can still be reliably identified.
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