The Main Principle of the Supermarket Eas AM Security Gate

 We all know that there will be anti-theft devices in shopping malls, supermarkets and other local areas. Today, we will focus on introducing the Eas am security gate to everyone and deepen our understanding of its working principle.

The main working principle of the supermarket anti-theft system is to stick an anti-theft label on the relatively small, expensive and relatively simple stolen products, and install security gate at the outlets of the shops. If the thief takes the product through the security gate, the security gate An alarm will be issued.

Eas am security gate works mainly in the following three ways.

1. Wireless point radio frequency system: The radio system uses radio waves to transmit signals, and the detection frequency scale is 7.x~8.x MHz. The signal it transmits is the same as that of a mobile phone and broadcast, but the frequency is different. The system cost of the radio system is relatively low, and installation is very convenient. However, it also has the disadvantage that the anti-theft tag is a loop-type time division, the system will be interfered by some external objects, so sometimes the division will cause false alarms or non-reports.

The radio system has two kinds of labels, soft and hard, so that most of the products in the supermarket can be protected. Generally, the two supports of the sound-magnetic anti-theft door cannot be larger than 0.9 meters, and the local area used is generally in a shopping mall with only one entrance and exit. Wireless systems are divided into two types: vertical and channel.

2. Acousto-magnetic system: resonance can be caused under the same oscillation frequency. The new word system uses this principle, its accuracy rate is very high, and the false alarm rate is almost zero. The acousto-magnetic system tag on the product will resonate when it enters the detection area of the system, but the receiver will only give an alarm when it is connected to four or five signal alarms.

The characteristic of the acousto-magnetic system is that it has good anti-interference, the width of the protected exit will reach 3.5 meters, and it can be demagnetized repeatedly. Acousto-magnetic systems include different varieties of vertical systems, channel systems and shaded systems, and there are also a variety of models to choose from.

3. Electromagnetic wave system: The detection signal of the electromagnetic wave system uses electromagnetic waves. The label of the electromagnetic wave system is relatively small, and the price of the label is relatively cheap. It can be repeatedly demagnetized, but it will also be misreported due to some interference from metal and magnetism. The protection width is generally about 0.9 meters.