Metal Detection Security Gate Store

Some time ago, when a woman was riding the subway, she refused to go through security and pushed the security inspector down the stairs until she fainted. The woman was detained for 10 days. In reality, there are many people who reject security checks, but not as extreme as this woman did. One of the reasons why everyone rejects him is that they don’t understand Qi Yuan and have concerns in their hearts. Today, let’s talk about some commonly used and currently advanced security inspection equipment. Security check

Security check

Security check, also called luggage check. Everyone is very familiar with it. It is the main luggage security equipment in subways and airports. Its origin is very simple, it is to use the ability of X-rays to penetrate materials. Different densities, different thicknesses, different compositions, and different X-ray penetration capabilities. It is based on the different penetrating capabilities of various materials to identify objects in luggage.

Display images of various luggage below

X-ray machines can not only identify the shape of objects, but also display colors. The colors of various substances are different. Organic materials, such as paper, clothing, and various foods, often appear orange. Mixed materials and light metals, such as those containing sodium, silicon, and aluminum, are usually displayed in green. Iron, copper, silver, etc. are displayed in black and blue. The lightness and darkness of the above colors depend on the density and thickness of the material.

Many people worry that the food in their bags will be contaminated once it passes through their luggage and is scanned by X-rays. Don’t worry too much about this. The X-rays emitted by luggage have very low power. When detected once, the radiation dose received is less than 5 microsieverts, which is far lower than the dose used for irradiation sterilization and preservation of food. Many of the foods we eat are actually irradiated, as are other countries. For example, the U.S. Food and Drug Administration and the U.S. Department of Agriculture have approved the following foods to be sterilized and preserved by irradiation, such as packaged refrigerated or frozen red meat, poultry, fresh fruits and vegetables, and grains.

Security gate, also called. It is mainly used to detect metal sharp objects carried by passengers. The principle is also very simple, it is the principle of using electric induction. Rapidly changing fields are generated on both sides, and these fields have no effect on the human body, with the exception of metals, because metals will generate eddy currents under the rapidly changing fields, and the eddy currents will generate a field. When this new field is detected, it will automatically sound or flash.

It will flash after detecting metal on the body

Many people are outmoded and often have resistance, thinking that it will be harmful to the body. Pregnant women are especially worried about this. It is normal for pregnant women to care about the fetus in their bodies. However, the safety door is not. It only generates an electric field and does not produce ionizing radiation. This electric field is very weak, only about 1 microtesla. This data is dozens of times different from the 30 microtesla specified in the country’s “pass-through general technical regulations”. In addition, we can also think of it this way, security personnel are always nearby. If it is harmful to the human body, I believe they will not agree.