EAS electronic anti-theft system for goods is used in shopping malls for anti-theft applications

After 40 years of development, the EAS electronic anti-theft system for goods has evolved from a single principle and a single product in the early days to a wide variety of different principles, which can meet the needs of different types of stores such as department stores, supermarkets, specialty stores, and libraries.

1. According to the protection form, it can be divided into vertical system, concealed system and channel system.

The detection device of the vertical system stands conspicuously at the entrance and exit of the shopping mall. In addition to the detection function, it also has an obvious deterrent effect.

The concealed system is to install the system under the carpet or ceiling at the exit, which does not affect the overall environment of the store, and can also play an anti-theft protection role, meeting the needs of the store owner for both beauty and anti-theft.

The channel system is to connect the EAS system with the cash register at the exit of the supermarket to form a channel protection, which is an effective way to achieve supermarket anti-theft.

2. According to the detection signal method used, it can be roughly divided into radio system, electromagnetic wave system, microwave system, frequency division system, intelligent system and acoustic magnetic system.

(1) Acoustic Magnetic System

A tuning fork will only resonate when the oscillation frequency is the same. The Acoustic Magnetic System (AM) applies this physical principle to achieve almost zero false alarm operation. When the Acoustic Magnetic System tag fixed on the product enters the detection area of the system, it will resonate, but the alarm will only be issued after the receiver receives four consecutive resonance signals (once every 1/50 second).

The characteristics of the Acoustic Magnetic System are high anti-theft detection rate, almost zero false alarm, good anti-interference, and a protected exit width of up to 3.5 meters. There are two types of soft and hard anti-theft tags, which can protect most types of goods in shopping malls and can be repeatedly demagnetized. Even next to the POS cash register, the system can still work normally.

The Acoustic Magnetic System includes vertical systems, channel systems and concealed systems. There are more than 10 models to choose from. It can be widely used in department stores, supermarkets, specialty stores, audio-visual stores, grocery stores, drug stores, and office buildings.

(2) Radio Frequency System

The radio frequency system (RF) uses radio waves as the transmitting and receiving signals, and detects electromagnetic waves with a frequency range of 7.4-8.8MHz, with a center frequency of 8.2MHz. The interference caused by the tag at 8.5MHz triggers an alarm. The biggest advantage of the radio system is that the system cost is very low and the installation is easy. However, since its anti-theft tag is a ring coil type, the system is easily interfered by some objects, such as electronic products such as cash registers, metal objects, etc., causing the system to falsely report or not report.

The radio system has two types of tags, soft and hard, which can protect most items in the mall. The distance between the two supports is generally not more than 0.9 meters, and it is usually used in malls with only one entrance and exit. The radio system has two types: vertical and channel types, which are used to protect department stores, clothing stores, supermarkets, etc.

(3) Electromagnetic Wave System

The electromagnetic wave system (Electromagnetic System) uses electromagnetic waves as the detection signal. The electromagnetic wave system has the smallest tag, the price is also cheap, and it can be demagnetized repeatedly, but it is easily affected by magnetic or metal materials and produces false alarms. The protected exit width is generally around 0.9 meters. The system will not affect magnetic items (such as audio tapes, video tapes, magnetic cards). The new generation of channel electromagnetic wave system is an electronic anti-theft system controlled by software. It uses digital processing technology to integrate the demagnetization system, cash register monitoring, and closed-circuit television monitoring system. It uses a fast demagnetization board, which can be demagnetized repeatedly, and the system cost is high. There are two types of electromagnetic wave systems: vertical and channel. The application environment is mostly in libraries, bookstores, music stores, hotels, supermarkets, etc.