Why people screening can detect dangerous substances?

Why people screening can detect dangerous substances?

People screenings are available with optional radiation detection capabilities in a single integrated system. People screening is a detection device that detects whether personnel are carrying metal objects. People screenings are mainly used in airports, stations, large conferences and other public places with a large flow of people to check. So some people may wonder why people screening can detect these metal objects.

l Why people screening can detect dangerous substances?

l Why we use people screening and handheld metal detector together?

l Does people screening use widely in our daily life?

Why people screening can detect dangerous substances?

People screening detect dangerous metals by using the principle of electromagnetism. It is in general known that any kind of electricity would generate a magnetic field around it. When this electric field passes over a metal object of any kind, the field passes right through it. The electrons in it are induced to move and produce a magnetic field of their own. In addition to this, it also creates a secondary magnetic field as well. This secondary magnetic field this created is what is detected by the people screening. The first coil induces the magnetic field into the metal object that a person might be carrying, whiles another coil in the people screening picks up this potential secondary magnetic field and accordingly sets off an alarm.

All people screenings work on the same principle, albeit in different ways. A hand-held detector is one of the most common ones even today. But in places where there is a high amount of people traffic, people screenings are used.

The only difference in the case of a people screening, in comparison to traditional ones, is the way in which the technology is used. People screening uses what is called Pulse Induction or PI technology. The PI system works by sending powerful and short bursts of current through coils of wire. Each of these pulses generates a short magnetic field in the coils of wire.

People screenings have these coils placed all around the individual, meaning that metal located in any part of the body can be easily detected by security personnel. In addition, people screening also allows the personnel to know the exact place where the metal object is detected.

Why we use people screening and handheld metal detector together

When we pass through people screening at stations, airports, or other places, we will see people using hand-held metal detectors to ensure that whether the human body is carrying a contraband, even when people pass through people screening. In fact, it is difficult for either a single hand-held metal detector or a people screening to complete the security inspection task efficiently and independently.

The judgment problem after the people screening alarms. When a person go through people screening, if there is a metal object on his body, the alarm will indeed sound. In this way, we know that the person has suspicious items on his body, which maybe are prohibited items. These items are generally Those that are not allowed will bring safety hazards. But the question is how do we judge what items this person is carrying. Because it is probably not a prohibited item, it may be just a bunch of keychains, or zippers.

The second inspection of the handheld metal detector. When the people screening finds that the person passing by is rich in metal objects, a close-range instrument to scan and check will then be used. After scanning, we found that we could gradually sweep away some items until we thought it was safe.

Does people screening use widely in our daily life?

When we go through the airport security check, many people can directly see the people screening. Many people don't know the people screening very well. They don't know why they didn't carry anything dangerous, but the people screening alarms when they passed from there. It is possible that we carry electronic products or electrical appliances, including voice recorders and precious metals.

The people screening is suitable for production-oriented enterprises, including electronics such as hard disks, mobile phones, MP3, translators, voice recorders, electronic devices; wires and cables; electrical appliances; gold and silver jewelry; mining; hardware products; precious metals such as copper and aluminum; and processing related industries.

The people screening is mainly used for all government departments, including the Municipal Public Security Bureau, courts, prisons, and detention centers. However, people screening is also suitable for use in public places, such as the entertainment venues and dance halls we often go to. Therefore, the people screening should be applied to these occasions.

The second applicable public places for people screening include stadiums, entertainment venues, airports, railway stations, bus stations, ports, exhibition halls, museums, banks, power stations, hotels, courts, prisons.

Therefore, the people screening plays a very important role in our daily life. And people screening not only gives more safety guarantees to others, but also gives a lot of safety guarantees to ourselves.

Learn more something about people screening can know why people screening can detect and the wide uses of people screening. If you want to buy good people screening with reasonable price, Shanghai Eastimage Equipment CO., LTD. is your best choice. Whether from quality or price, or delivery time, we can help customers to open up a further and larger market. We have all types of different people screening and if you have any questions, you can contact us or search us online.