X-ray security inspection machine, also known as baggage security instrument or security inspection machine, the necessary safety equipment at airports, train stations and subway stations is mainly used to detect luggage packages carried by personnel. This uses the X-ray principle to penetrate various substances, similar to the principle of hospital photography. You can penetrate the interior of a substance by showing the outline of an object, by showing the structure of different components, and using different colors to represent it. The colors of various substances are different. Organic matter, such as paper, clothes, and various foods, is usually orange. Mixed materials and light metals, such as materials containing sodium, silicon and aluminum, are usually indicated in green. Iron, copper, silver, etc. are represented by black and blue.

　　The above color depends on the density and thickness of the material; X-rays are radiation, and direct contact with the human body will inevitably cause different degrees of damage, but because the X-ray security inspection machine only detects items, not the human body, the X-ray source is protected by various layers Isolation, the X-ray of the security inspection machine is emitted in a vertical thin plane. Only when the object passes through the X-ray emission port of the security inspection machine will there be radiation, and there will be no X-ray emission in the rest of the time.


In addition, the country has a clear radiation leakage dose requirement for the output X-ray security inspection machine, if it does not meet the standard, it will not let it be produced. So you don't have to worry about the damage caused by the baggage security device. Then some people will worry about whether the food in their bags will be contaminated after being irradiated by the X-ray of the security machine. There is no need to worry too much about the X-rays emitted by the baggage screening machine, rather than X-ray leakage pollution.
These are two different concepts. Once tested, the radiation dose received is less than 5 microsieverts, which is much lower than those used for radiation sterilization and preservation of food storage. Many of the foods we eat are actually irradiated. For example, the US Food and Drug Administration and the US Department of Agriculture have approved the following foods to be irradiated for sterilization and preservation, such as red meat, poultry, fresh Fruits and vegetables, and cereals.


Through the above explanation, I do n’t know if I can better understand. Public transportation safety inspections are related to our common safety issues. I hope we have more questions to consult, learn more, and cooperate more with safety inspections. Work hard to create a harmonious and safe living environment!