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First, the principle of the radio system: The radio system uses radio waves as signals for transmission and reception, and the detection frequency range is 7.x to 8.x MHz. Radio signals of different frequencies are emitted. The biggest advantage of the radio system is that the system cost is very low and the installation is very convenient. This is the first principle of supermarket security doors.
The second is the principle of electromagnetic waves: The electromagnetic wave system uses electromagnetic waves as detection signals. His label is the smallest, the label price is cheap, and demagnetization can be repeated, such as is used in university libraries, but the system is susceptible to false positives due to magnetic or metallic substances. This is the second principle of supermarket security doors.
The third kind. Acousto-magnetic principle: The tuning fork only causes resonance when the oscillation frequency is the same. The principle of acousto-magnetic is the application of this physical principle, to achieve almost zero false alarm operation, when the sound and magnetic system tags fixed on the goods enter the system's detection area, the two will generate resonance, but only at the receiver to receive After four consecutive resonance signals, an alarm is issued. Acoustic and magnetic system is characterized by a high rate of anti-theft detection, almost zero false positives, good anti-interference, the width of the protection of exports up to 3.5 meters, which is the third principle of supermarket security doors.
What is the principle of supermarket security doors? I believe that after Xiaobian's above introduction, we already have a certain understanding of this, we can choose according to actual needs, friends who want to buy supermarket security doors can find the desired product on this site, And there will be advantages in price.
What is the principle of supermarket security door? Since ancient times, the role of the gate is to keep warm, and the other is to prevent theft. In order to prevent theft, the door is also constantly strengthened from the wooden door to the security door. The security door can effectively protect your own property, and the supermarket is particularly needed. Supermarket covers a wide area, only relying on the camera is not a real anti-theft, so the supermarket has also used a security door, the supermarket's security door is not an ordinary door, then the supermarket's security door uses what principle? Listen to Xiao Bian to explain and explain.