For the airport and railway station security inspection equipment, everyone is already accustomed to, but how these instruments work, what specific functions, I am afraid many people may not know. How did the security inspector look through the screen of the security checker to see the prohibited items in the large suitcase? Whether the X-ray security machine has radiation or not will cause harm to the passenger's body. To solve these problems, watchdog security machine equipment to solve these problems.
Security equipment at the railway station includes hand-held security devices, security doors and X-ray security machines. After passing through the security gate, the hand inspector sweeps his body with a hand-held security inspection device. From time to time there will be “drip†sounds. This proves that there are metal objects on the passenger’s body. Security doors and handheld security devices are used to detect metal objects such as Regulatory Iron Kun, etc., its working principle is the use of electromagnetic coils for magnetic field induction, encountered metal objects reflected and sound alarm issued by the sound, there is no electromagnetic radiation, so even if direct exposure to the human body will not cause damage.
The working principle of the X-ray security inspection machine is to use X-rays to perform imaging inspection on the items. This X-ray can penetrate glass, ceramics, metals, liquids, wood, fabrics and other objects. After penetration, the radiation reaches the circuit board below the conveyor belt to form a ray signal, which is then converted into a computer image.
Due to the different materials of different types of materials, the degree of X-ray penetration is also different, and the color of the image display will be different. On the screen of the security device, non-contraband items such as backpacks and mineral water appear as orange, metallic objects as dark blue and black, and flammable and explosive materials such as hair gel and oil. The outer cans are blue and the middle is green.
The security inspection machine checks the baggage mainly depends on the color and shape to distinguish, most contraband goods will appear as red green, dark blue, black, but not all of them, so we need to use shape to judge, but also need professional knowledge and Accumulation of experience!
For the issue of whether the X-ray screening machine will damage the passengers or the checkmate's body through radiation, Captain Li explained that X-rays will cause damage to the human body, but the security instrument uses low-dose X-rays, which is only used by hospital chests. One-fortieth of the X-ray dose, in addition, the entire machine has been leak-proof measures, security inspection machine conveyor belt above the black cord called lead curtain, is made of lead and rubber mixture, can effectively prevent the X detection area Ray leaks. Whether it is a passenger or a check-in crew sitting beside an inspection machine for a long time, the body will not suffer damage.
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