New uses of wifi: Detect bombs and explosive materials accurately!

There will never be terrorists, put bombs in bags in public places, if this system becomes a reality.

The airport security is complex and strict, so you can imagine somewhat. You and your baggage must go through the scanner, subject to a series of inspections to ensure compliance with the regulations, so that you can reach the airport lounge.

But in fact, sometimes the most stringent system seems to have made mistakes, so that terrorists or other elements are likely to threaten the safety of passing through, causing extremely serious consequences.

Remember the terrorist incident on September 11, 2001, the event also happened because the hijackers were able to board the plane and cause a bloody disaster.

The traumatic terror event September 11, 2001.

So how can airport security be pushed to the highest level of safety? According to an engineer from Rutgers University (USA), we can do that just by relying on . Wi-Fi waves.

Yes, it is the wave that helps phones and computers connected to the internet in the future to help ensure public safety. Accordingly, Wi-Fi can become a tool to detect weapons, bombs and chemical explosives in an extremely effective way, and most importantly . cheap .

The study was published in the IEEE 2018 conference - on communications and network security. Specifically, experts pointed out that most dangerous objects are made up of metals and liquids.

Most dangerous items are made up of metals and liquids.

Already metal, they will hinder Wi-Fi waves, and science can find a way to determine that. Moreover, if the bag contains weapons, it is only made from fabrics that are easy for Wi-Fi waves to pass through, so there are no obstacles.

To achieve this result, the team built a system to identify weapons using Wi-FI waves, which can emit a notification when the signal is obstructed by an external object. They tried 15 types of objects, contained in 6 types of bags. As a result, the system can distinguish between dangerous objects, with up to 99% accuracy.

Regarding hazardous materials, the system determines 90% accuracy. About metal objects, the accuracy is 98%, and the liquid is 95%.

If the object is in a normal type bag, the correct rate is 95%. But if the object is wrapped in another material, the rate drops to only 90%.

Wi-Fi waves can identify weapons more than 95% accurate.

Currently, airports are using X-ray scanning systems and tomography to control security. However, the system is quite cumbersome, expensive and difficult to apply in other public places. Therefore, we must use human factors to check us, although this method is potentially risky and cannot be covered completely.

"In a large area, building a scanning system like an airport is very difficult," said Yingying Chen, the study author.

"Still have to use human power, so we want to create an alternative system, minimize that."

Currently, the team is focusing on improving the ability to accurately identify weapons. This system needs to determine the shape, even estimate the volume of liquid in the bag.

Many experts assess that this may be a new security standard in major events, such as grand concerts, sports, or anywhere at risk is the goal of terrorism.