How to prevent supermarket goods from being stolen

1, supermarket anti-theft and anti-theft door system

2. Supermarket monitoring system

3. Various warning signs posted in the supermarket

4. Safety labels of supermarket goods.

5. Play in the supermarket, etc.

Radio frequency burglar alarm is generally used in supermarkets, and the burglar alarm antenna is mainly composed of transmitting antenna and receiving antenna. The transmitting antenna transmits a radio signal to the receiving antenna, thereby generating a wireless electromagnetic field scanning area between the transmitting antenna and the receiving antenna. In fact, the anti-theft tag is an LC oscillation generator (consisting of an inductive coil and a capacitor in parallel), which, like the anti-theft antenna, is made by a special process and generates a radio signal of 8.2MHz. Due to the oscillation of this radio signal, the scanning area of electromagnetic field between anti-theft antennas changes, that is, the signal that can generate alarm is generated by using this change. There are two kinds of detectors, one is a transmitting antenna and the other is a receiving antenna. In fact, the principle of anti-theft buckle you mentioned is the same as the white paper. With the button signal, the door distance can be installed at 1.2- 1.6m, while the "white paper" is actually called "soft label", which limits the door distance to 0.9-1.2m. ..