What s going on with the alarm system for supermarket sales

There will be a barcode on the things you buy, and you don't have to pay for them, and the cashier doesn't remove the magnetism of the things you buy, and it will ring when you go out, but many things don't have them, hehe.

Everything you buy will have a barcode on it, or a barcode that the supermarket has put on it. When the money is handed over, the cashier will enter it into the computer. Indicates that it can be released.

Something else. Don't try to steal, even if you tear off the barcode, there will be a monitor to watch it. The security guards aren't all dry food, either.

The principle of magnetic induction, generally is to spray or paste magnetic things on the goods, when purchasing, the waiter will eliminate the magnetism, if not eliminated, when the goods pass through the anti-theft door, the magnetic induction area on the door will be cut magnetic inductance line movement, so that the current induction device of the door is energized, then the alarm will be called. At this time, the loss prevention officer at the door will check according to your checkout receipt.

Many supermarkets wear magnetic alarms for valuable goods, and there is no cashier to take them off when you go to the supermarket to check out, and the magnetic ** door behind will call the police.

The principle of supermarket alarm is to use the principle of magnetic response to prevent theft, and the alarm device at the door of the supermarket is also known as the "anti-loss door", which is equipped with a magnetic device. If the product has not been demagnetized and passes through the damage prevention door, an alarm will be given.

A detector is set at the exit or cash register channel of the supermarket, and the detector comprises a transmitter and a receiver, when the transmitter sends a signal at a specific frequency, the receiver receives this signal, and then produces a monitoring area. When an unprocessed EAS tag passes through the detection area, it causes interference, and when the receiver detects this interference, an audible alarm is triggered.

There are two main technologies used by EAS on the market: one is radio frequency technology and the other is acousto-magnetic technology. About 52% of the global market is EAS systems with RF technology and about 30% are EAS systems with acousto-magnetic technology.

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Anti-theft refers to the act of preventing the use of improper acts to illegally infringe on the property of others or public property, or to take possession of existing property.

Whether it is a department store or a supermarket, the most easily lost goods in open shelf sales stores are mainly concentrated in cosmetics, shampoos, cigarettes, films, batteries, chocolates, clothing and apparel (such as cashmere sweaters, fur coats, leather coats, etc.), CD VCD and other high-quality and easy-to-carry goods. The loss of such goods accounts for about 50% to 70% of the losses in the mall. If they are effectively protected, it will greatly help to reduce the overall loss.

In the open-guessing and fire-setting store, the most easily stolen goods are displayed in the place where the salesperson is most frequented, even if the salesperson is very busy, he can take care of these goods, which will increase the difficulty of stealing and is conducive to the prevention of theft of goods; In addition, the most stolen goods should not be placed close to the exit, as the high turnover of people makes it difficult for the salesperson to spot or distinguish the thief.

The alarm device at the entrance of the supermarket is equipped with a magnetic response. If the product has not been demagnetized and passes through the damage prevention door, an alarm will be given.

The detector is generally composed of two parts: a transmitter and a receiver. Its basic principle is to use the transmitting antenna to transmit a scanning band, form a scanning area between the transmitting antenna and the receiving antenna, and then use the receiving antenna to receive and restore the frequency band within its receiving range, and then use the resonance principle of electromagnetic waves to search for whether there is a valid tag in a specific range, and when a valid tag appears in the area, the alarm is triggered.

Here's how it works:

1. The detector is generally composed of two parts: the transmitter and the receiver. Its basic principle is to utilize the transmitting antenna to transmit a scanning band to send out, form a scanning area between the transmitting antenna and the receiving antenna, and utilize the receiving antenna in its receiving range to receive and restore this frequency band, and then use the resonance principle of electromagnetic waves to search whether there is a valid label in a specific range, and when a valid label appears in this area, the alarm is triggered.

2. The internal structure of the electronic tag is an LC oscillation circuit, which is installed on the commodity in a special way, and can only be removed by a special decoder and unlocker. The electronic labels that appear in the market are soft labels, hard labels, wine bottle protectors, milk powder anti-theft labels, CD tape protectors, etc.

3. The decoder is a device for the failure of soft tags. The most commonly used decoder on the market is a contactless decoder, which can be decoded by the salesperson within 20cm of the decoder. The decoder can be used with the POS laser cash register platform.

A lock pick is a quick, easy, and simple way to remove all kinds of hard tags.

Many supermarkets will install alarms, what are the main types of alarms? Today is a long time to see.

There is a built-in machine inside, specifically to scan the stripe code on the goods, if the goods are not demagnetized when paying the bill, so many doors will be swept to, and the police will be called after the goods come in, some products are not magnetic, these products will not be taken out directly will not alarm, when the salesman collects the money, the one in his hand is a code reader, and the one below is a degausser.

The back of the barcode is actually a radio frequency identification tag, and the alarm works on that. Like you said, as long as the label isn't on it, it won't ring anyway.

Classification and principle of electronic anti-theft alarm system for supermarket goods.

Acousto-magnetic system. Tuning forks only cause resonance if they oscillate at the same frequency. Acusto magnetic system (Acusto magnetic) is the application of this physical principle, to achieve almost zero false alarm operation, fixed on the product of the acoustomagnetic system label into the detection area of the system, will produce resonance, but only after the receiver receives four consecutive resonance signals (every 1 50 seconds), the alarm is issued.

The acoustomagnetic system is characterized by high anti-theft detection rate, almost zero false alarms, good anti-interference, and a protective outlet width of up to 35 meters, there are two kinds of soft and hard anti-theft labels, which can protect most kinds of goods in the mall, and can be repeatedly demagnetized, even if the system can still work normally next to the POS cash register.

Acousto-magnetic systems include vertical systems, channel systems and concealed systems, with more than 10 models to choose from, which can be widely used in department stores, supermarkets, specialty stores, audio and video stores, grocery stores, pharmacies, and office buildings and other environments.

Radio system.

Radio frequency (RF) systems use radio waves as signals transmitted and received, and the detection frequency range is 7 x 8 x megahertz. The biggest advantage of the radio system is that the system cost is very low and it is easy to install. However, due to its anti-theft label for the toroidal coil type, the system is susceptible to the interference of some items, such as electronic products such as cash registers, metal objects, etc., causing false alarms or non-reporting of the system.

The radio system has both soft and hard tags to protect most items in the mall. The distance between the two bearings is generally not greater than 0 9 meters, and it is usually used in shopping malls with only one entrance and exit. There are two types of radio systems, vertical and channel, which are used to protect department stores, clothing stores, supermarkets, etc.

Electromagnetic wave system.

The electromagnetic system uses electromagnetic waves as detection signals.

Electromagnetic wave systems have the smallest labels, are inexpensive, and can be degaussed repeatedly, but are susceptible to false alarms due to the influence of magnetic or metallic substances. The width of the exit of the protection is generally about 0 9 meters. The system does not affect magnetic items (e.g. audio tapes, video tapes, magnetic cards).

The new generation of channel-type electromagnetic wave system is a software-controlled electronic anti-theft system, which uses digital processing technology to connect with the degaussing system, cash register monitoring, and closed-circuit television monitoring system. The use of fast degaussing plates can be repeated degaussing, and the system cost is high. There are two types of electromagnetic wave systems: vertical type and channel type.

The application environment is mostly in libraries, bookstores, music stores, hotels, supermarkets, etc.