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The Principle and Function of EAS Anti-theft System[Bohang China]

Views:3     Author:Site Editor     Publish Time: 2019-05-21      Origin:Site

EAS Anti-theft System attaches an electronic anti-theft label to small, valuable and easily stolen goods. There is a check-in door at the exit of the store. When the thieves pass the check-in door with the labeled goods, they will alarm immediately (like check-in at the airport entrance), while the normal shopping goes through the checkout counter. It will invalidate the label and will not alarm.

EAS system consists of soft label system and hard tag system.
1. Soft label system: It consists of detection antenna (transmitter and receiver), decoder and soft label. When used, the purpose of protecting goods can be achieved by placing soft labels on the goods. When someone tries to steal the labeled goods, the antenna detects the label signal on the goods after the goods pass through the detection channel, and at the same time gives an alarm sound, promptly reminds the security personnel, so as to achieve the purpose of anti-theft. When purchasing normally, the salesman decodes the anti-theft label after checking out, and the customer can "safely" pass through. Soft label system is mainly used for books, audio and video products, washing products, cultural goods and other shopping malls, soft label one-time use. A kind of
2. Hard tag system: consists of detection antenna, unlock device and various hard labels. When used, the hard label is fastened on the commodity (which can not be removed by hand). After the customer pays, the salesman uses the locker to remove the hard label. Otherwise, when the commodity with the hard label passes through the detection area of the antenna, an alarm will be sounded. Hard label system is widely used in all kinds of clothing, shoes and hats stores and specialty stores. Hard labels can be used repeatedly.

Overview of Electronic Anti-theft Alarm System for Commodities.
With the development of science and technology and all the benefits, it is no longer appropriate for retail stores to monitor the traditional anti-theft methods of shopping malls by human. Instead, they will use high-tech electronic goods anti-theft system. The theft of retail goods is a universal problem in the world. According to foreign statistics, the loss of a merchandise of only $9.34 requires a turnover of $849 to recover the loss. The loss of commodities undoubtedly aggravates the burden of enterprises. Therefore, loss prevention has gradually become the focus of domestic enterprise leaders.

As early as the late 1960s, the first electronic anti-theft system EAS appeared in the United States. It has fundamentally changed all the previous anti-theft measures aimed at customer surveillance. Implementing anti-theft guardianship of commodities avoids the consumer's resistance. This anti-theft and deterrent effect has been recognized by many retailers. At present, most of the world's large retail enterprises use electronic anti-theft devices. EAS systems began to enter Asian countries 10 years ago, Japan, Singapore, Korea, Hong Kong and Taiwan are increasing year by year. After the 1990s, Chinese enterprises began to install EAS system in shopping malls in Beijing, Shanghai, Guangzhou and Shenzhen.
   Classification of Electronic Anti-theft Alarm System for Supermarket Commodities
After 40 years of development, the electronic anti-theft system has developed from a single principle product in the early stage to a variety of different principles. It meets the needs of different types of stores, such as department stores, supermarkets, monopoly stores, libraries and so on. A kind of
If the electronic anti-theft system is subdivided from the protection form, it can be divided into vertical system, concealed system and channel system. The detection device of the vertical system stands prominently at the entrance and exit of the shopping mall, which has obvious deterrent effect besides the detection function. The concealed system covertly installs the system under the carpet or ceiling of the exit, does not affect the overall environment of the store, but also plays a role of anti-theft protection, to meet the needs of both beautiful and anti-theft shopkeepers. Channel system is an effective way to realize the anti-theft of supermarkets, which integrates EAS system with cash register at the exit of supermarkets and forms channel protection. If distinguished by the way of detection signal, it can be roughly divided into radio system, electromagnetic wave system, microwave system, frequency division system, intelligent system and am system.


1. Am system

The tuning fork only causes resonance when the oscillation frequency is the same.am system applies this physical principle to achieve almost zero false alarm operation. When the label of AMS fixed on the commodity enters the detection area of the system, it will produce resonance, but only after the receiver receives four consecutive resonance signals (once every fifty seconds), it will send out an alarm. The characteristics of acoustical and magnetic system are high anti-theft detection rate, almost zero false alarm, good anti-interference, wide protection outlet up to 3.5 meters. There are two kinds of anti-theft labels, soft and hard, which can protect most kinds of goods in shopping malls, and can repeat degaussing. Even beside POS cash register, the system can still work normally. Acoustic-magnetic system includes vertical system, channel system and concealed system. There are more than 10 models for selection. It can be widely used in Department stores, supermarkets, monopoly stores, audio-visual stores, grocery stores, pharmacies, office buildings and other environments.

2. RF system
RF uses radio waves as transmitting and receiving signals. The detection frequency ranges from 7.x to 8.x MHz. The greatest advantage of the radio system is that the cost of the system is very low and the installation is convenient. However, due to its anti-theft label is ring coil type, the system is vulnerable to interference from some items, such as electronic products such as cash register, metal products and so on, resulting in false alarm or non-report of the system. The radio system has two kinds of labels, soft and hard, which can protect most of the goods in the shopping mall. The distance between the two bearings can not be greater than 0
.9 meters, usually used in a market with only one import and export. There are two types of radio systems, vertical and channel, which are used to protect Department stores, clothing stores, supermarkets and so on.
3. Electromagnetic wave system
Electromagnetic system uses electromagnetic wave as detection signal. Electromagnetic wave system has the smallest label, cheaper label price, repetitive demagnetization, but it is vulnerable to magnetic or metal material influence and produce false alarm. The width of the protected export is generally about 0
.9 meters. The system does not apply to magnetic objects (e.g.records, videos, magnetic cards) have an impact.The new generation of channel electromagnetic wave system is an electronic anti-theft system controlled by software. It uses digital processing technology to connect with degaussing system, cash register monitoring system and closed-circuit television monitoring system. Using fast degaussing board can repeat degaussing, and the system cost is high. There are two types of electromagnetic wave system: vertical and channel. The application environment is mostly in libraries, bookstores, sound stores, hotels, supermarkets and so on.


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