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1. Overview of the traditional EAS system
With the continuous improvement of people’s living standards and the continuous evolution of lifestyles towards leisure and comfort, in shopping malls, bookstores, libraries and other occasions, open-shelf sales and open-shelf lending have become the main means for people to shop and borrow. It serves as a main means to improve service quality and economic efficiency. But the ensuing problem is that the loss of goods and books has become a headache for merchants. It severely harms the interests of merchants, causes merchants’ profits to be lost, and even leads to the closure of shopping malls. How to prevent the theft of goods and protect the interests of businesses has attracted more and more attention from retailers. In this context, the EAS system has gradually been recognized and accepted by the majority of businesses, and its application in shopping malls, libraries and other fields has become increasingly widespread.
EAS (Electronic Article Surveillance), also known as electronic commodity anti-theft system, is one of the commodity security measures widely adopted in the retail industry. It is a high-tech electronic anti-theft device, which uses high-tech means to give goods a kind of self-defense ability, which can effectively protect goods and prevent goods from being stolen. In foreign countries, 90% of retail businesses use EAS systems to reduce theft rate. In China, the EAS system has gradually been accepted and adopted by the majority of merchants. EAS system is the most reliable and economical high-tech management method to reduce theft and loss.
A typical EAS system generally consists of three parts, 1) electronic sensors attached to the goods; 2) electronic sensor control devices, so that the authorized goods can enter and exit normally; 3) monitors, which emit a certain amount of radiation within a certain area of the exit Surveillance space.
The working principle of the EAS system is: In the surveillance area, the transmitter transmits a signal to the receiver at a certain frequency. Transmitters and receivers are generally installed at the entrances and exits of retail stores and libraries to form a certain surveillance space. When a tag with special characteristics enters the area, it will interfere with the signal sent by the transmitter. This interference signal will also be received by the receiver, and then after the analysis and judgment of the microprocessor, it will control the sound of the alarm.
According to the detection signal method of the application, it can be divided into different types such as radio system, electromagnetic wave system, microwave system, frequency division system, intelligent system and acousto-magnetic system. At present, the EAS system has also been widely used in major shopping malls, bookstores, and libraries in China. Its basic working principle is as follows:
(1) Attach the magnetic strip to the product.
(2) Install a detector at the exit passage of the mall.
(3) The authorized goods are demagnetized by a dedicated degausser to make the magnetic strip invalid.
(4) When unauthorized goods (not demagnetized) pass through the exit, the access control detector detects and issues an alarm to intercept the goods from going out.
2. RFID technology’s attention to EAS
With the continuous advancement of technology, in recent years, especially in the past five years, the application of Internet of Things technology has developed rapidly, especially in the fields of warehousing, logistics, and intelligent transportation. The Internet of Things has demonstrated its strong technical strength and vitality. As one of the main technologies of the Internet of Things, the application of RFID technology has attracted more and more attention. As an upgrade technology of barcodes, RFID technology has incomparable advantages over barcodes, such as multi-target identification, remote identification, confidentiality, etc., which will not be repeated here.
As a supporting EAS technology developed with barcodes, what role should it play in the RFID era? Will it continue to exist intact? Disappear? Or keep up with the pace of RFID technology and keep pace with the times? The first thing to be sure is: As an effective anti-theft technology in shopping malls, EAS will not end its historical mission because of the withdrawal of barcodes. Combining with RFID technology, a technical solution for EAS based on RFID technology is proposed. Based on the traditional EAS, this technology stores the anti-theft information in the RFID electronic tag. Through the identification of the electronic tag, it achieves the purpose of preventing theft of goods.
ThingMagic’s full range of UHF RFID equipment has good label compatibility, that is, it does not pick the chip type of the label. At the same time, it is perfectly compatible with special functions such as EAS in the label. It can be used in more scenarios and applications. Able to perform well.
3. Application analysis of UHF electronic tag EAS function
RFID is classified according to frequency. There are low frequency, high frequency, ultra high frequency, microwave and other RFIDs, which have their own strengths in different application fields. This article only describes the EAS technology involved in ultra-high frequency (UHF) RFID that has broad application prospects in the fields of warehousing, logistics, retail, book management, and intelligent transportation.
Take large-scale retail applications as an example. If UHF RFID technology is used for quick and easy commodity access management, while the original EAS system is used for access monitoring, it will inevitably cause two systems to exist at the same time. Bring difficulties and increase the operating costs of businesses.
Because the ISO18000-6C agreement does not stipulate the relevant standards of EAS, different electronic label chip design companies have different considerations in the design of EAS. This article takes NXP’s second-generation RFID chip as an example to briefly introduce the EAS working principle of the RFID electronic tag chip.
1. Registration of electronic tags
Before using an electronic tag, it needs to be registered. Registration is the process of writing the basic information of the item to be attached into the electronic tag and entering the information into the database. Each electronic tag has a special read-write EAS bit, which can be modified only through specific commands. In the process of tag registration, the EAS bit is set at the same time.
2. Commodity delivery
Before goods with electronic tags are shipped out of the warehouse, a reader must be used to send special instructions to clear the EAS bit in the electronic tags. Only commodities that have completed this step can safely pass the detection device at the exit. Taking book borrowing as an example, when a reader selects a book and needs to borrow it, he can go through the borrowing procedures on the self-service borrowing and returning machine, and the self-service borrowing and returning machine will automatically clear the EAS bit. Readers can safely pass through the detection door. If you have not gone through the borrowing procedures, there will be a sound and light alarm when you pass the inspection door.
At present, there are more and more companies that can provide UHF RFID electronic tags, and the definitions and access methods of the EAS bits of the electronic tags of different companies are different. When designing EAS for different RFID electronic tags, you first need to know its access instructions. The RFID electronic tags provided by other companies do not have a dedicated EAS bit. For this type of tag, if you want to use the EAS function, what should you do? The usual practice is to open up 1 to more data bits in the EPC area or user data area. EAS function, the specific location and size can be defined by yourself according to development needs. When the EAS function is needed, the specific value of the specific location can be specified. When the monitoring module reads the electronic tag, it first analyzes the EAS bit and drives an alarm when an abnormality is found. However, the use of this kind of analog EAS function is usually less efficient than the dedicated EAS function.
Four, summary
The traditional retail industry and other fields mostly adopt the bar code plus EAS sales management model. With the promotion and application of RFID technology in the retail industry and other fields, it will surely bring innovative changes to the industry. At the same time, because RFID technology itself considers the EAS function, in many places where RFID technology is applied, EAS function can be easily implemented, simplifying management, and reducing costs. It is a high-end shopping mall, large and medium-sized supermarkets, libraries and other display humanized management and Iconic equipment with technological content is an inevitable trend in the development of modern retail and other fields.
However, many read-write devices on the market currently have the function of reading the tag EAS, which makes this special design wasteful.
ThingMagic’s full range of UHF RFID equipment has good label compatibility, that is, it does not pick the chip type of the label. At the same time, it is perfectly compatible with special functions such as EAS in the label. It can be used in more scenarios and applications. Able to perform well.
As an agent of ThingMagic, a leading RFID brand, Shenzhen Quanshunhong Technology Co., Ltd. provides all major operators and integrators with ThingMagic’s full range of products. At the same time, the company has always provided a professional technical team, high-quality service, and preferential treatment. Price, to provide our customers with world-class RFID equipment solutions and high-quality after-sales service. The company cooperates with major operators and integrators to successfully use ThingMagic RFID equipment in various applications such as manufacturing, warehouse management, aviation shipping, clothing retail, anti-counterfeiting and traceability.
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