We need to at the airport by security inspection device to boarding, at this time are always security personnel with airport security scanners with our body up and down or so scan it again. Many people do not adapt to such a personal security airport security scanners is not completely reliable. In 2009, a terrorist hide explosive escaped the security within the underpants, narrowly avoiding the crash tragic accident. In order to make the passengers are more likely to accept the body security, countries began to adopt new developed airport security scanners, can be in contact with the case of body whole body scan of passengers, and passengers can be more easy to accept this kind of non-contact developed airport security scanners. And, more importantly, the airport security scanners not scan a corner, any parts can be scanned to ensure that the human body, hide of dangerous goods in the way the undetected in underpants doesn't work anymore.
With the deterioration of the situation, national liquid Inspection equipment and terror to personnel security has increasingly become the weak link of security work. In developed airport security scanners, before the metal gate is widely used for a long time cannot cope with explosives, non-metal cutting tool, the threat of hazardous liquid dangerous goods and other kinds of nonmetallic and weapons, make people for some time that the security vulnerabilities is serious, forced on the western civil aviation airport security demanding places the compulsory searched manually. This not only seriously violated people's privacy, degrading, but also reduce the speed of security, and because the reliable hard to check the private parts, which still exists security vulnerabilities.
American civil aviation attempted bombing incident at the end of 2009, a terrorist is in an attempt to use explosives hidden in the underwear manufacturing bombing attacks, but because of the terrorist China X Ray baggage scanner manufacturer manufacturing technical mistakes explosive device detonated bombs failed to normal. To cope with the increasingly serious terrorist threat, west of accelerated promotion has been used for years in the airport security scanners, which is given priority to with human body scanner. This kind of airport security scanners can detect the people carry all items except textiles, detect quickly and leave no dead Angle, more efficient than the traditional personal checking.
At present, the more mature airport security scanners basically has two kinds, one kind is back scattering scanning, is a kind of millimeter-wave scanning. There is also a terahertz scanning techniques in research and development and testing, the performance is not so stable. Back scattering scanning is a X-ray scanning technology, it can be found through obscured objects hidden items, such as through the body's clothing produces high resolution image. Back scattering equipment is widely used for many years in prison, diamond mining, customs search, medical detection, can be tested again in recent years as the airport security scanners use. Use of back scattering scanning airport security scanners using high-energy x-rays from China X Ray baggage scanner wholesaler, the ray is different from low-energy x-rays for medical, low energy X rays can penetrate the object, and high energy x-rays can be reflected from the object surface. Due to a virus called the effect of the Compton scattering effect, ray scanning the density of the object according to its different and in different directions. They are able to penetrate clothes, but not through flesh and more solid objects. As a result, the Compton scattering effect means that the weapons, explosives and other dangerous goods through the back scattering scanning will be exposed.