The magnetic stripe anti-theft system in supermarkets generally adopts bar code anti-theft system. Bar code electronic labels (with bar codes on the front and microcoils on the back) are divided into soft labels and hard labels. Soft labels have low cost and can be 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.

When purchasing normally, the clerk decodes the anti-theft label after checking out, and the customer can pass "safely". The soft label system is mainly used in shopping malls such as books, audio-visual products, washing products and cultural goods, and the soft label is disposable.

Decoding requires a decoder, which is mostly non-contact equipment and has 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), thus reminding the cashier, customers and security personnel of the mall to deal with them in time. Incidentally, the degaussing process needs to go through the decoder, so it is useless to bring degaussing machines from other supermarkets.

Extended data:

Anti-theft technology of acousto-magnetic soft label in supermarket

The tuning fork will only cause * * * vibration if the oscillation frequency is the same. Acoustics is the application of this physical principle to achieve almost zero false alarm. When the acousto-magnetic system tag fixed on the commodity enters the detection area of the system, it will generate * * * vibration, but the system will give an alarm only when 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, no metal foil shielding, good anti-interference and wide protection exit (the maximum width of a single system can reach 4 meters).

Acousto-magnetic system has two kinds of anti-theft labels, soft and hard, which protect most kinds of goods in shopping malls. The soft label is small in size and can be degaussed repeatedly, so it is the first choice for anti-theft source label scheme.

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.

Baidu encyclopedia-supermarket anti-theft