What is the principle of the anti-theft system at the entrance of the supermarket?

Radio frequency principle

The electronic commodity anti-theft system consists of a detector, an electronic tag and a decoder/lock opener. A 1. detector usually consists of a transmitter and a receiver. Its basic principle is to use the transmitting antenna to transmit a scanning frequency band, form a scanning area between the transmitting antenna and the receiving antenna, use the receiving antenna to recover the reception of this frequency band within its receiving range, and then use the * * * vibration principle of electromagnetic waves to search whether there are valid tags in a specific range. When there are valid tags in this area, an alarm will be triggered. 2. The internal structure of the electronic tag is an Lc oscillating loop, which is installed on the commodity in a special way and can only be released through a special decoder and lock opener. At present, there are soft labels, hard labels, milk bottle protective covers, milk powder anti-theft labels, CD/ tape protective boxes and so on. 3. Decoder is a device with invalid soft label. At present, the contactless decoder is widely used in the market. As long as the salesperson passes the label within 20cm above the decoder, it can be decoded. The decoder can be used with POS laser cashier platform. The lock opener is a device that can quickly, conveniently and simply remove all kinds of hard labels.

Function of electronic anti-theft system for goods

1. Prevent theft. Electronic goods monitoring has changed the way of "person-to-person" and "person-to-person" in the past. It endows commodities with self-defense ability through high-tech means, so that safety measures are implemented in every commodity, which completely and effectively solves the problem of commodity theft. The survey shows that the theft rate of businesses with electronic goods monitoring is 60%-70% lower than that of businesses without electronic goods monitoring. 2. Simplify management. Electronic goods monitoring can effectively curb the phenomenon of "internal theft", ease the contradiction between employees and managers, eliminate employees' psychological barriers, and make employees devote themselves to their work, thus improving work efficiency. 3. Improve the shopping atmosphere. In the past, the "person-to-person" approach disgusted many consumers, and businesses may be left out in the cold. Electronic goods monitoring can create a good and relaxed shopping environment for consumers, let them buy goods freely, greatly improve the relationship between merchants and consumers, and win more customers for merchants. Finally, it increased sales and profits. 4. deterrence. Electronic commodity monitoring uses a tough and polite way to prevent customers from shoplifting and avoid disputes caused by human factors, while respecting human rights and safeguarding the interests of enterprises. For the thief, electronic goods monitoring gave him a great psychological deterrent, which made the "single-minded" people give up the idea of stealing. 5. beautify the environment. Electronic article surveillance itself is a high-tech product. Its beautiful appearance and sophisticated manufacturing technology can be integrated with modern gorgeous decoration to achieve the effect of "icing on the cake", protect goods and beautify the shopping environment. It is a landmark equipment for high-end shopping malls and large and medium-sized supermarkets to display their economic strength and scientific and technological content, and it is an inevitable trend of the development of modern shopping malls.

Summary of electronic anti-theft system for goods

With the improvement of people's living standards and the acceleration of the pace of life, open-shelf supermarkets provide consumers with convenient and fast shopping methods, which are increasingly welcomed by consumers. The emergence of a large number of supermarkets, on the one hand, has brought great convenience to consumers, significantly improved the service quality and economic benefits of merchants, and at the same time brought a headache to merchants-theft of goods. The warning line of commodity loss rate commonly used in the world is 0.8% of the turnover of 65438+, while the loss rate of goods in open shelves, self-selection, supermarkets and chain stores in China has reached 3%-5% of the turnover. According to CCTV reports, in Shanghai, in 1993, the amount of goods stolen from supermarkets was more than 3 million yuan, but by 1997, it had reached more than 30 million yuan. In Beijing, the amount of goods stolen from 1998 supermarket is 70-80 million yuan. According to Beijing Evening News on May 22, 2000, from 65438 to 0999, the amount of goods stolen from supermarkets nationwide was 80 billion yuan. Unfortunately, this number is still growing rapidly. It has seriously damaged the interests of merchants, lost their profits in vain and even led to the closure of shopping malls. Therefore, how to prevent goods from being stolen has become an urgent problem for many businesses. Electronic article surveillance system (EAS). It is a high-tech electronic anti-theft device. It gives commodities a self-defense ability through high-tech means, which can effectively protect commodities and prevent them from being stolen. In foreign countries, 90% of the retail industry adopts electronic article monitoring to reduce the theft rate. In China, electronic goods monitoring is gradually accepted and adopted by most enterprises. Electronic article monitoring is the most reliable and economical high-tech management tool to reduce theft and loss. The anti-theft of electronic articles produced by our company adopts the principle of LC resonance reflection, which has the advantages of beautiful appearance, high sensitivity and low false alarm rate.

Beijing Shi Sheng Longtu-Supermarket Commodity Anti-theft Solution

First, demand analysis.

With the increasing popularity of clothing chain stores and supermarkets in China, the loss of goods is becoming more and more serious. How to prevent goods from being stolen and protect the safety of shopping malls has attracted more and more retailers' attention. Electronic anti-theft system (EAS) in shopping malls has changed the traditional man-to-man mode, focusing on technical defense. Because EAS can effectively prevent the loss of goods and improve economic benefits, it has been gradually recognized and accepted by the majority of businesses, and has been widely used in the China market.

Most large retail enterprises in the world use electronic anti-theft devices. Electronic article monitoring systems have been installed in shopping centers in developed cities such as Beijing, Shanghai, Guangzhou and Shenzhen. EAS has become the mainstream and trend of anti-theft in supermarkets!

Classification and performance comparison of electronic anti-theft system in shopping malls;

There are four main anti-theft technologies for electronic articles, namely, radio frequency, electromagnetism, acoustomagnetism and radio frequency identification. Because electromagnetic and RF products are cheap, and their labels are usually permanently attached to commodities or commodity packaging; Microwave and acoustic magnetic labels are more expensive, and most supermarkets will choose electromagnetic and radio frequency. So it is explained by electromagnetism and radio frequency.

radio frequency

It is mainly composed of detector, decoder and electronic tag, and the auxiliary equipment also has a lock opener.

Electronic tags can be divided into soft tags and hard tags. Soft labels have low cost and are directly attached to "hard" goods. Soft labels cannot be reused. The one-time cost of hard label is higher than that of soft label, but it can be reused. Hard labels must be equipped with special nail puller, which is mostly used for soft and easy-to-penetrate items such as clothes. Decoders are mostly non-contact devices with a certain decoding height. When the cashier checks out or packs, the electronic tag can be decoded without touching the degaussing area. There is also a device that combines the decoder with the laser bar code scanner to complete the collection and decoding of goods at one time, which is convenient for the cashier's work. This method must cooperate with laser bar code suppliers to eliminate their mutual interference and improve decoding sensitivity. A detector is usually a detection system device at the entrance or exit of a shopping mall or checkout aisle. After receiving the correct payment from the customer who bought the goods, the cashier can legally authorize the goods to leave the designated area by invalidating the labels attached to the goods. When the undecoded goods are taken out of the mall, the alarm will be triggered when they pass through the detector device (mostly door-type), so as to remind the cashier, customers and mall security personnel to deal with them in time.

electromagnetic type

It is mainly composed of an anti-theft antenna, a degausser and a magnetic stripe. It is assisted by a magnetic stripe detector.

Performance index comparison:

1. Detection rate:

Detection rate refers to the number of alarms when a unit number of valid tags pass through different positions in the detection area from different directions.

Wireless radio frequency: For daily necessities, the radio frequency system loses its alarm effect and the comprehensive alarm rate is low because its soft label is annular coil type, if there are tin foil paper or metal parts on the protected articles. Generally 60-80%;

Electromagnetic system: As the consumables used in the device are magnetic strips, which are not affected by tin foil or small metal parts, the alarm rate can be between 95%.

2. Resistance to metal interference:

Radio /RF system is most seriously affected by metal shielding, which may be one of the main limitations of radio /RF in practical application. Electromagnetic wave systems are also affected by metal objects. When a large piece of metal enters the detection area of electromagnetic wave system, the system will turn off. When metal shopping carts and shopping baskets pass by, even if the goods inside have valid labels, they will not give an alarm because of shielding.

3. Protection width:

Shopping malls need to consider the protection width of the anti-theft system to avoid the narrow width between brackets and affect customers' access. In addition, shopping malls want more spacious entrances and exits.

Generally, the installation width of electromagnetic system is 75- 120cm, and the radio frequency is 90- 160cm.

4. Types of commodities to be protected:

From the protection scope of the whole department store, because many small commodities in the supermarket contain tinfoil or metal components, the soft labels protected by RF system are easy to be shielded and alarmed, and the number of protected commodities is relatively small, and the types of electromagnetic system protection are greater than those of RF system.

5. Price considerations:

The price of anti-theft antenna of electromagnetic system is higher than that of RF system;

The price of electromagnetic system consumables is much lower than that of RF system consumables;

Second, compared with the closed-circuit television system, the advantages of electronic anti-theft system are very obvious:

(1) High efficiency. The electronic anti-theft system catches the thief on the spot when he goes out, which has a great deterrent effect on theft. Even if the inspector observes the act of hiding goods, the CCTV system can only search him after he goes out, and the tracking time is long, which may not be effective.

(2) Save manpower. Closed-circuit television system requires several people to stare at the screen all day, which greatly increases the wage cost and difficulty of shopping malls, while electronic anti-theft system can be managed by security guards part-time.

Three, shopping mall electronic anti-theft system working mode and equipment selection:

Anti-theft detection steps:

1. Label the goods against theft.

2. Install detectors in the exit passage or cashier passage of the shopping mall.

3. After payment, the goods will be decoded or unlocked by a special decoder, and the labels will be removed.

4. When the unpaid goods (with labels) pass through the exit, the door detector detects the labels and gives an alarm to prevent the goods from going out.

Anti-theft equipment selection:

Radio frequency system: anti-theft antenna+decoder (for eliminating soft tag)+soft tag+lock opener (for eliminating hard tag)+hard tag.

Electromagnetic system: anti-theft antenna+degausser+degausser (8 cm iron composite or 6 cm cobalt composite magnetic stripe is recommended).

Four, the characteristics of SSLT commodity anti-theft system:

Features of SSLT anti-theft system:

The Market Position of Shi Sheng Longtu;

① The first professional equipment manufacturer in China to realize the single-channel installation width of electromagnetic anti-theft system 120cm.

② The first professional equipment manufacturer in China whose electromagnetic system adopts DSP (Digital Signal Processing) technology.

③ The first professional equipment manufacturer in China to use phase-locked three-ring synchronous recursive filtering technology in RF system.

④ The first and only professional equipment manufacturer in the industry, whose electromagnetic wave system and RF system are exported to EU, USA, Russia and Mongolia in large quantities at the same time.

(1) electromagnetic system:

General description:

With stable performance, high alarm rate and high-grade design, it is the first electromagnetic anti-theft system in China to realize single-channel installation width 120 cm. Now exported to EU, USA, Russia, Mongolia and other places, suitable for bookstores, libraries, video stores, pharmacies, cosmetics stores and so on.

Specific instructions:

◆ Maximum channel width: single channel 120cm.

High sensitivity: it can detect 3 cm magnetic stripe at the shortest, and detect all magnetic stripe products on the market, with high security.

Good stability: It has the most advanced DSP technology in the world, which perfectly guarantees the stability and reliability of the system.

◆ No false alarm: The detector's advanced self-checking ability can effectively identify and filter external interference sources, and achieve the ideal effect of high alarm and no false alarm required by experts and customers.

Strong anti-metal ability: the self-developed intelligent digital microcomputer control technology and three-ring synchronous recursive filtering technology have improved the anti-metal interference ability of the system unprecedentedly, and the anti-metal interference can be adjusted freely.

Strong technical pertinence: The company has designed a series of products with the best technical pertinence according to the installation requirements of large and medium-sized bookstores, libraries, pharmacies, video stores and cosmetics stores. , providing customers in various industries with the most accurate professional anti-theft services.

Avant-garde design and perfect details: the company's anti-theft system mainly has two styles: technology and elegance. Among them, the series products that highlight the scientific and technological style are simple in appearance, smooth in lines and pure in gray, white and black design, which perfectly embodies the characteristics of the new scientific and technological era and is suitable for customers who pursue scientific and technological fashion. A series of elegant products,

Elegant appearance, exquisite streamline, the pure wood color design of the main part is perfectly combined with fine materials such as steel, crystal and plastic, which is suitable for customers who pursue elegant and mellow cultural atmosphere to install.

Mature and stable online technology: freely realize multi-channel online use of a host, improve management efficiency and reduce costs for customers.

◆ The most popular additional optional function-statistical function of in-store passenger flow: By connecting computers, statistics, analysis and report generation of current and historical passenger flow can be realized, helping customers to improve their management efficiency.

◆ Comply with environmental protection standards: the power of the product is less than 5 watts, with long service life, low power consumption and no radiation to human body.

High cost performance: the technical capital close to international quality and the ultra-low installation and agency price pioneered in China provide the most cost-effective solution for you to perfectly realize the management concept of minimum investment and maximum benefit.

(2) RF system:

General description:

Stable performance, high alarm rate, high-grade design, single-channel installation width up to 180 cm, and now a large number of exports to the European Union, the United States, Russia, Mongolia and other places, suitable for supermarkets, clothing stores, shoes and hats stores, luggage stores and so on.

Specific instructions:

◆ Maximum channel width: single channel 180cm.

High sensitivity: special weak alarm signal recognition technology.

Good stability: it has the most advanced DSP (digital signal processing) technology and phase-locked three-ring synchronous recursive filtering technology, which perfectly guarantees the stability and reliability of the system.

◆ Error-free alarm: Automatic adaptation, self-detection technology and automatic gain control technology can effectively identify, filter and suppress external environmental interference, and achieve the ideal effect of high alarm and error-free alarm.

◆ Elegant and fashionable design: The combination of design technology and elegant demeanor makes the European appearance elegant and fashionable. Ivory white and black high-strength engineering plastics and aluminum-titanium alloy materials, either as the main body or combined with each other, perfectly display the design concept of stores in large, medium and small shopping malls, supermarkets, boutique clothing stores and so on. Focus on fashion and elegance.

◆ International standards: comply with the regulations on radio frequency, signal strength, electromagnetic interference (EMI) and radio frequency interference (RFI) issued by the Federal Communications Commission (FCC).

Verb (abbreviation of verb) SSLT's service commitment

Pre-sales commitment:

1. We guarantee that the provided product performance and parameters are absolutely true and reliable.

Our company guarantees that the products recommended for you are the most advanced products in the industry.

3. The related products provided by our company guarantee the quality of goods and will not cause harm to human body during use:

Services for sale:

1. Our company guarantees that the delivered equipment and accessories are completely consistent with the catalogue ordered by Party A, and provides instructions and warranty cards to ensure the normal use of Party A, otherwise Party B will replace them unconditionally;

2. Our company provides users with training within the business scope and solutions to common problems;

3. Our company shall ensure that Party A's orders are delivered on time, and consider the time of the goods on the way;

after service

1. The detailed terms of after-sales service of our company's related products are based on the Consumer Protection Law of People's Republic of China (PRC), the Product Quality Law of People's Republic of China (PRC) and other relevant laws and regulations.

The implementation of the provisions of;

2. During the warranty period of installation acceptance and normal use, we will replace the system host used by Party A free of charge (except for man-made and natural disasters and damage caused by Party A's own disassembly or maintenance).

The maintenance expenses and related expenses caused by improper operation and use of Party A's personnel shall be borne by Party A), and the equipment shall be maintained for life.

3. We will send someone to the installation site for maintenance within 72 hours after receiving the maintenance notice by phone or fax from Party A (the response time in Beijing is within 24 hours).

4. We pay irregular customer visits to the equipment purchased by customers, and will reply to customers as soon as possible if there is any doubt.

5. In addition to 8-hour office customer service telephone, MSN, QQ, KEYPE and customer message answering service, it also provides 24-hour uninterrupted telephone service.

Six, the role of commodity anti-theft system

(1) anti-theft

Commodity anti-theft system has changed the way of "man-to-man" and "man-to-man" in the past. It endows commodities with a self-defense ability through high-tech means, makes security measures implemented in every commodity, and completely and effectively solves the problem of commodity theft. The theft rate of installing commodity anti-theft system is reduced by 60%-70% compared with not installing anti-theft system.

(2) Simplify management

Commodity anti-theft system can effectively simplify the work tasks of staff and improve work efficiency.

(3) Improve the atmosphere of the reading room.

In the past, the way of "person to person" made many readers feel uneasy. Commodity anti-theft system can create a good and relaxed learning environment for customers, so that customers can buy goods freely and freely.

(4) Deterrence

Commodity anti-theft system prevents customers from shoplifting in a tough and polite way, avoids disputes caused by human factors, respects human rights and protects the interests of supermarkets.

For thieves, the commodity anti-theft system gives them a great psychological deterrent, which makes the "single-minded" people give up the idea of stealing.

(5) beautify the environment

Commodity anti-theft system itself is a high-tech product. Its beautiful appearance and sophisticated manufacturing technology can be integrated with modern gorgeous decoration to achieve the effect of "icing on the cake", protect goods and beautify the shopping environment. It is a landmark equipment for high-end supermarkets to show their economic strength and scientific and technological content, and it is an inevitable trend of modern supermarket development.

Seven, engineering installation rules

Field rules:

① Provide a dedicated power socket on the management desk. Parallel grounding wire

Rules for installation form:

① Pipeline embedment: 25PVC pipes are embedded. Double-core shielded wire for detecting door and power supply.

(2) Cutting the ground: after cutting the shielded wire, ensure that the ground and the metal U-shaped groove are on a horizontal plane. And ensure that there is no leakage and hole collapse.

(3) Arc-shaped metal trunking: ensure that the trunking can be fixed after being stuck on the ground and cleaned, and form an I-shape with two anti-theft antennas.

Remarks: At the connection line between the equipment and the main engine or power supply, the straight line should ensure that the trunking is straight and the elbow should be connected at a 45-degree angle.

Post-installation training:

Staff training:

① Correct pasting of anti-theft consumables and matters needing attention

② Normal use of anti-theft auxiliary equipment: such as correct use of degausser, common problems, etc.

(3) Normal use of equipment and matters needing attention

④ Common equipment faults and simple troubleshooting.

⑤ Correct handling method after equipment alarm.

Longtu, Shi Sheng, Beijing

Address: Baiziwan Road, Chaoyang District, Beijing 1

Tel: 0 10-87727434 to 800213366110239.

Fax: 0 10-87727424 to 80 14.

Contact: Han