Is there any material that will not be illuminated when passing through the X ray machine at the air

X-rays emitted by an X-ray machine.

It can penetrate many items, except for objects with high material density, generally metals such as iron, copper, gold, silver, and mixtures: barium sulfate.

Wait. However, the KV of the current security inspection machine is very high, all above 150, and there is no problem at all in the penetration of iron bottles, unless lead is used. Lead is black underneath the x-rays. But the lead will inevitably trigger the machine to automatically alarm.

In the X-ray machine that passes through airport security, some common materials and items may be detected, including metals, liquids, electronic devices, etc. However, there is no material that can go completely undetected.

Some plateau subordinal materials, such as lead, stainless steel, concrete, etc., may have a strong blocking effect on X-rays, causing them to appear distinct images on the X-ray machine. Some substances with low atomic number, such as plastics, textiles, etc., have a weak blocking effect on X-rays, so they may present a weak image or no image on the X-ray machine.

However, even some seemingly innocuous items, such as paper products, food, etc., may present a distinct image on the X-ray machine. Therefore, it is advisable not to bring prohibited or illegal items when passing through airport security to avoid unnecessary trouble.

Lead, but I don't see that it needs to be opened and inspected.

There is no X-ray emission at the airport security gate, and its principle is that when the metal conductor is excited by the alternating electromagnetic field, an eddy current is generated in the metal conductor, and the current emits a magnetic field with the same frequency as the original magnetic field but in the opposite direction, and the metal detector is to detect whether there is a metal object nearby by detecting whether the eddy current signal is present. The excitation electromagnetic wave is emitted by the transmitter, the signal of the metal object is received by the receiving sensor, and the signal generated by the eddy current is detected by the receiving sensor, and then through a series of amplification processing by the circuit, when the signal reaches the set value, the alarm is generated in the form of sound and light.

The principle of the X-ray security inspection machine is to send the inspected baggage into the crawler tunnel with the help of a conveyor belt. After the item enters the channel of the security inspection machine, the detection device sends the relevant information to the control unit, and the control unit triggers the X-ray source to emit X-rays. After the X-ray passes through the collimator to form a very narrow fan-shaped beam of rays, it penetrates the baggage items on the conveyor belt and falls on the detector, and the detector turns the received X-rays into electrical signals, and these weak current signals are amplified and quantified, and transmitted to the industrial control computer for further processing through the general serial bus, and the high-quality image is obtained after complex operation and imaging processing.

Radiation: X-ray security inspection machine has detected the radiation dose before leaving the factory, and invited experts from the environmental protection department and professional radiation detection companies to test each security inspection machine, which is fully in line with the relevant national standards. The X-ray security inspection machine used in the subway security check has very little radiation, and some special groups such as pregnant women, etc., are no problem when standing next to the machine or passing through the security check, and the radiation dose is similar to that of a mobile phone.

Metal detectors and hand-held metal detectors are in compliance with the main safety standards and passenger safety standards, and they obtain high resolution through digital signal processing that induces parasitic currents and homogenizes magnetic fields, and the thickness of the emitted magnetic field is very low, which is harmless to pacemaker wearers, pregnant women, infirm, magnetic media and other electronic devices.

Therefore, you can rest assured that you can pass through the security gate and X-ray security inspection machine, and there is no radiation.

No, the main function is metal detection...

The security gate at the airport does not function the same as the X-ray machine. Airport security door performance introduction: shockproof design, the door body is made of PVC advanced synthetic material technology, and with waterproof rubber sleeve, with waterproof fireproof, anti-corrosion and other characteristics.

With 6 overlapping metal detection areas, airport security gates use current digital pulse technology, interactively transmitting and receiving, accurately determining the location of metal objects

The main chassis panel has its own LED light display module, and the airport security gate can go straight to the corresponding position where the human body carries and hides prohibited items.

The function is different, but the principle is the same, they all use X-rays to see through objects, so we can see that in order to prevent people from being radiated, the entrance and exit of the luggage are covered with lead sheets. However, there are no impermeable walls, and pedestrians passing by them will be more or less radiated to a little bit. Occasional exposure to radiation doesn't hurt, but the security guards who are there .........

There are two types of detection principles, including ion mobility and fluorescent polymers.

Traditional ion mobility: For the ionization of molecules of detected substances, due to the difference in mass and charge, the time of migration in the electric field and the time and speed of migration to the sensor at the end of the electric field are different.

Fluorescent polymer technology: In order to solve false alarms, special thin film materials are used, which can only react to the molecular structure of various ** substances, so theoretically, fluorescence technology will not be false positives, but it cannot be like ion mobility technology, which can only detect ** substances by upgrading the database.

When the plane passes through security, you need to take out your documents, luggage, and metal objects that you carry with you for inspection.

Passengers go to the security check channel, there is a security counter at the entrance of the channel, and the passenger will hand over the passenger coupon, boarding pass and ID card of the ticket to the security inspector, and the security inspector will stamp the boarding pass if there is no problem. Feast on the envy.

Then go through the security gate, and the belongings you bring will pass through the X-ray security machine next to the security gate, and the passengers themselves will pass through the security gate, and the security check will enter the waiting hall without asking the first question.