How to guard against theft in supermarkets?

Question 1: How does the supermarket guard against theft? Because the goods are labeled with anti-theft labels (magnetic strips), they are decoded after payment. If they are not decoded, the security door will definitely detect them.

If it is an ordinary apple, the security door will not give an alarm without a magnetic stripe.

Question 2: How do supermarket bar codes guard against theft? Ordinary paper bar codes are not magnetic, so they do not have anti-theft function.

Nowadays, in large supermarkets, most goods are added with an anti-theft label during production.

There are many kinds of anti-theft labels in supermarkets, such as acoustomagnetic, radio frequency, hard label and soft label. Some labels with bar codes can also have anti-theft function through composite processing. Zhuhai Hanbo anti-theft label reminds you, please don't intentionally destroy the anti-theft accessories in the supermarket.

Question 3: How does the supermarket guard against theft? There are three main means of supermarket anti-theft, 1, supermarket monitoring 2, supermarket loss prevention 3, and supermarket anti-theft access control equipment.

Supermarket monitoring: At present, supermarkets will install closed-circuit monitoring appliances, which are installed at the entrances, exits, main passages and corners of supermarkets.

Wait a minute. Location. Supermarkets generally have loss-proof offices, and someone is always responsible for staring at the monitoring screen to see the supermarket.

Dynamic.

Supermarket loss prevention: Supermarket loss prevention has a special loss prevention department, which is also a security department, in order to prevent the supermarket from being damaged.

Lost. General supermarket entrance, checkout counter, gate, safe passage, employee passage have security personnel to prevent damage. supermarket

It is also equipped with plain clothes to prevent damage, which is specially used to prevent customers from catching thieves inside the supermarket.

Supermarket anti-theft access control equipment: supermarket anti-theft access control with magnetic anti-theft label, after being attached to the goods, if not,

Degaussing through the cashier will trigger the alarm of the security door.

Yiante supermarket anti-theft

Question 4: How is the anti-theft system in the supermarket made? First of all, there are only three mainstream anti-theft systems in supermarkets at present, namely, radio frequency system, acoustic and magnetic anti-theft system and electromagnetic wave system.

Working principle:

Radio frequency system

Radio frequency (RF) uses radio waves as transmitting and receiving signals, and the detection frequency ranges from 7. X to 8. X megahertz. The transmitted signal is a radio signal, which is the same as the mobile phone and radio, but with different frequencies. The biggest advantage of wireless system is its low cost and convenient installation. However, because its anti-theft tag is a ring coil type, the system is easily disturbed by some items, such as electronic products such as cash registers and metal objects. , resulting in false alarm or no alarm.

The radio system has two kinds of labels, soft and hard, which can protect most items in shopping malls. The distance between the two brackets is generally not more than 0.9 meters, which is usually used in shopping malls with only one entrance and exit. There are two kinds of radio systems, vertical and tunnel, which are used to protect department stores, clothing stores and supermarkets.

○ Acoustomagnetic system

The tuning fork will only cause * * * vibration if the oscillation frequency is the same. Acousto-magnetic system (Acousto-magnetic) has realized almost zero false alarm by applying this physical principle. When the acousto-magnetic system tag fixed on the commodity enters the detection area of the system, it will generate * * * vibration, but it will give an alarm only after the receiver receives the * * * vibration signal for four consecutive times (once every 1/50 seconds).

Acousto-magnetic system is characterized by high anti-theft detection rate, almost zero false alarm, good anti-interference, and the width of protection exit can reach 3. 5 meters. There are two kinds of anti-theft labels, which can protect most kinds of goods in shopping malls and can be degaussed repeatedly. Even at the POS cash register, the system can still work normally.

Acousto-magnetic system includes vertical system, channel system and concealed system. There are many models of 10 to choose from, which can be widely used in department stores, supermarkets, specialty stores, video stores, grocery stores, pharmacies and office buildings.

Electromagnetic wave system

Electromagnetic wave systems use electromagnetic waves as detection signals.

The tag of electromagnetic wave system is the smallest, and the tag price is cheap. It can be demagnetized repeatedly, but it is easy to be affected by magnetic or metallic substances and produce false positives. The width of the protective exit is generally about 0.9 meters. The system will not affect magnetic objects such as magnetic tapes, video tapes and magnetic cards.

The new generation channel electromagnetic wave system is an electronic anti-theft system controlled by software, which adopts digital processing technology and integrates with degaussing system, cashier monitoring and closed-circuit television monitoring system. The fast degaussing board can be used for repeated degaussing, and the system cost is high. There are two kinds of electromagnetic wave systems: vertical and channel. The application environment is mostly in libraries, bookstores, musical instruments, hotels, supermarkets and so on.

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Question 5: How should large supermarkets guard against theft? At present, EAS anti-theft scheme is widely used.

It has a mature application history abroad.

According to the experience of Hangzhou Meister Intelligent Technology,

Usually, products using RF or acousto-magnetic series,

Comprise a soft and hard label, a self-sounding label, a decoder, a nail extractor, an anti-theft antenna and the like,

If the goods in the supermarket are labeled and the cashier doesn't decode or take off the label,

When you put it near the door antenna, the antenna will sense the alarm.

Question 6: What are the good anti-theft methods in supermarkets? The concept of bar code

Barcode or barcode is a graphic identifier that arranges a plurality of black bars and blanks with different widths according to certain coding rules to represent a group of information. Common bar codes are parallel lines composed of black bars (referred to as bars) and white bars (referred to as spaces) with great differences in reflectivity. Barcode can indicate the country of production, manufacturer, commodity name, date of production, book classification number, starting and ending place, category, date and many other information, so it has been widely used in many fields such as commodity circulation, book management, postal management, banking system and so on. Detailed explanation of 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!

Second, the classification and performance index 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 are divided into soft tags and hard tags. Soft labels have low cost and can not be reused because they are directly attached to hard goods. 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 RF: For daily necessities, the RF system has a loop coil as its soft tag. If there are tinfoil or metal components on the protected items, the alarm effect will be lost and the alarm will be fully given.

The alarm rate is low. 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. The electromagnetic wave system will also

Affected by metal objects, when a large piece of metal enters the detection area of electromagnetic wave system, the system will stop. When metal shopping carts and shopping baskets pass by, they will stop in the room.

Even if the goods on the surface 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 protected commodities: ... >>

Question 7: How does the burglar alarm in front of the supermarket work? You know, all the goods in the supermarket can't be handled by 100%. It is good to be able to achieve a ratio of 5%. Even if the goods are processed, they may be stolen, so we must first establish the concept of loss prevention in supermarket management. Loss prevention is actually a psychological tactic, so I won't discuss it here. As for the anti-theft principle of the anti-theft device, I will not explain it further, because it is too white for supermarkets to detect it, and the supermarket alarm is equal to a white alarm. But we can say many usages, such as soft labels. Supermarkets can let suppliers wear them when packaging. Customers pay at the cashier, and the cashier is equipped with a decoder (degausser) to remove the built-in soft label. If there are no goods handled by the cashier, they will call the police when passing through the security door.

Question 8: How to take off the anti-theft magnetic buckle in the supermarket? The invention discloses an opening method of an anti-theft buckle,

Method 1: find a magnet to contact the lock head of the magnetic buckle (at the bulge of the magnetic buckle), gently shake the magnetic buckle to make the steel ball fully contact with the magnet, and pull out the steel needle. Be careful not to forcibly pull out the steel needle when the magnet touches the lock head, because if the steel ball is not attracted by the magnet, it will only be pulled tighter and tighter. Try to pull out the steel needle after a full turn.

Method 2: The previous steps are the same as above. When the magnet comes into contact with the lock head, the hand holding the magnetic buckle gently taps the magnet with a little force, then turns the magnetic buckle, and then pulls out the steel needle with a nail. Because of the long recycling time of supermarket magnetic buckles, some steel balls are either so smooth or rusted. Sensitivity has decreased.

Method 3: Violent demolition. Violent demolition is actually very simple. Just burn the position of the lock core, that is, use a tool to open a small gap in the protruding piece, take out the spring, then knock the steel needle on the table a few times and gently pull out the steel needle. All right. If it is not convenient to burn the position of the lock core, it is easy to open the button by clamping the edge of the button with pliers when removing the button, because there is a small hole in the edge.

Question 9: How to unlock the supermarket anti-theft buckle? There is a magnetic coil inside the anti-theft buckle, LC oscillator principle. When the anti-theft buckle enters the protection zone of the anti-theft device, the anti-theft device will start to alarm after sensing magnetism. Experts explain the unlocking principle of the anti-theft buckle (attached figure): there are two pairs of small grooves on the nail shaft (attached figure) (only one pair of grooves is shown in the schematic diagram). When the nail is inserted from the bottom of the anti-theft buckle, several small steel balls in the buckle will slide to the position of the groove on the nail; The iron ring on the steel ball firmly clamps the steel ball in the groove under the pressure of the top spring. In this way, it is impossible to push the nail down from the bottom with ordinary brute force. How to unlock the anti-theft buckle of Linzhang Trust-Mart: Use a professional lock opener (also called nail puller, which consists of a magnetic ring and a magnetic core. The combination of the two forms an eddy current magnetic force, which is concentrated in the center of the lock opener, and the tension is 8500GS. Through this powerful lock opener, the anti-theft buckle of the flying saucer can be easily opened. You can take the shopping receipt to the shopping mall where you bought the goods at that time and ask the service desk to take it down for you. Shopping centers are equipped with powerful lock openers. Then introduce the tips of netizens. If you have strong magnetism, you should be able to throw the anti-theft buckle. This method may damage the anti-theft buckle, and thicker and stronger clothes will not be damaged (thinner clothes will be fine). Mine is a thin sweater, and it worked. There is also a coil in the anti-theft buckle. My solution: because there is no strong magnetic field and I don't want to break it hard, I pried a crack with a blade and pried it open with a screwdriver. Perfect. Take it off.

Question 10: How to prevent the goods in the supermarket from being stolen? At present, anti-theft labels are used. In the cashier's office, degaussing is used to kill the anti-theft tag so that it does not alarm.