The essential difference between mobile phone security screening gates and metal security screening gates

Everyone should be familiar with metal security gates, because metal security gates can appear in any place, such as stations, subways, high-speed rails, etc. Every time we go there, the alarm will beep, and then the staff will check it with a handheld instrument. The door we pass through is a metal security gate. So what are the specific differences from mobile phone detection gates! Let me introduce it to you.

The metal security screening gate mainly detects metal objects and issues alarm prompts. The application scope covers airports, stations, public security and judicial systems, education, factories, event venues, large-scale events, etc. The working principle of the security screening gate is that the crystal oscillator generates 3.5-4.95M sinusoidal oscillation, which is divided by the frequency divider into a sine wave of about 7.6K. After power amplification by the transistor and coil, it is input into the large coil of the door panel (zone 9) for electromagnetic wave emission, which is received by the coils in zones 1-8 inside the door. After receiving, the received signal is compared with the reference signal. After the change is found, the output level of the acquisition card is changed. The CPU scans the 8-location acquisition card data within 280 milliseconds to determine the location of the metal and output the display. To put it simply, it uses the principle of magnetic field induction to judge the signal of the area inside the security screening gate. If metal passes through, it will affect the magnetic field, thereby identifying the changes in the original magnetic field and displaying alarms in the corresponding areas. It can also count the number of people and the number of alarms. It can also display the approximate position of the metal on the human body, and alarm through sound and light.

Mobile security gate

So how does the mobile phone security screening gate work? In fact, the working principle of the mobile phone security screening gate is the same as that of the metal security screening gate. The only difference is that the two types of security screening gates have different detection products. The metal security screening gate detects metal products, while the mobile phone security screening gate only detects mobile phones, thereby excluding other metal objects without generating an alarm. Therefore, the mobile phone detection gate is more targeted.

Through the above content, I believe everyone has a very clear understanding of the difference between mobile phone security screening gates and metal security screening gates!