Recent research by Rutgers University researchers in New Brunswick, United States, reveals interesting facts about Wi-Fi signals. According to their research, Wi-Fi signals can be a security tool.
Monday (08/20/2018). The researchers said that Wi-Fi signals were able to detect chemicals, bombs and weapons.
The study shows how the wireless signal is able to penetrate the bag to detect the dimensions of dangerous objects and liquid volumes.
With several trials, the researchers found that the system was 95 percent accurate. The researchers hope that the detection system can help disinfect public areas, such as museums, stadiums, amusement parks, and school buildings.
One of the researchers said: "The system has a major impact on community protection efforts from dangerous objects. Compared to traditional security systems, Wi-Fi detection methods are more cost-effective, "
Not only that, Wi-Fi detection systems can avoid privacy violations by having to open and examine people's personal items. Wi-Fi detection systems also do not require the power of many humans.
The detection system uses a Wi-Fi device with two or three antennas. One antenna is useful for sending signals, while one antenna receives a signal. The way it works analyzes the reflection of objects and materials.
The system is able to detect and analyze signals from solid objects such as weapons, aluminum cans, laptops and batteries. The system is also able to estimate the volume of liquids such as water, acids, alcohol, and other chemicals.
During the study, Yingying et al tested the system with 15 types of objects and six types of bags. They recorded 99 percent accuracy for dangerous objects, 98 percent for metals, and 95 percent for liquids.
Meanwhile, the use of a standard backpack shows an accuracy rate of 95 percent and drops to 90 percent when dangerous objects are wrapped using another layer.