The supermarket's bar code anti-theft uses electronic tags (not all products have them), the front is a bar code, and there is a miniature coil in the sticker on the back, which has been integrated. Bar code electronic labels are divided into soft labels and hard labels, which have low cost and can be directly pasted on hard goods, and 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 penetrating items such as clothes. ?

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), so as to remind the cashier, customers and mall security personnel to deal with them in time.

Extended data:

Commodity bar code is an important part of ANCC system and the foundation of its development. Mainly used for barcode identification of retail goods, non-retail goods and logistics units. The main types of bar codes are ean-13/8 UPC-a/eitf14 ean/UCC128.

Commodity barcodes include retail commodities, non-retail commodities, logistics units, location codes and barcodes. China has adopted the international commodity coding and barcode identification system, popularized and applied commodity barcodes, and established China's commodity identification system.

Retail goods refer to goods that are scanned and settled by POS machines at the retail end. Its bar code identification consists of global trade item number (GTIN) and its corresponding bar code symbol, and the bar code identification of retail goods mainly adopts EAN/UPC bar code.

Non-retail goods refer to goods that are used for distribution, warehousing or wholesale operation without POS scanning and settlement. Its identification code consists of global trade item number (GTIN) and its corresponding bar code symbol. Bar code symbols of non-retail goods mainly adopt ITF- 14 bar code or UCC/EAN- 128 bar code, and EAN/UPC bar code can also be used. A carton containing 24 cigarettes and a tray containing 40 boxes of cigarettes can be used as non-retail goods for wholesale and distribution.

The bar code of logistics unit is a temporary combined package for convenient transportation or storage, which needs to be tracked and managed separately in the supply chain.

By scanning the bar code label on each logistics unit, the link between logistics and related information flow can be realized, and the physical movement of each logistics unit can be tracked separately.

The code of the logistics unit is identified by the serial number of the cargo packing box (SSCC- 18). A box of 12 skirts and 20 jackets of different colors and sizes, and a tray containing 40 boxes of drinks (each box 12 box) can be regarded as a logistics unit.

Bar code technology was born with the development and application of computer and information technology. It is a new technology integrating coding, printing, identification, data acquisition and processing.

Using bar code scanning is the general trend of future market circulation. In order to make goods circulate freely and widely in the world, enterprises must abide by the relevant provisions of commodity bar codes whether designing, manufacturing, applying for registration or using commodity bar codes.

The birth of commodity bar code greatly facilitates the circulation of commodities, and modern society cannot do without commodity bar code. According to statistics, at present, there are 500,000 kinds of products in China that use the international commodity bar code.

After China's entry into WTO, enterprises will surely win more space for activities on the international stage. To keep up with international practice and meet the needs of international trade, enterprises should not mistreat commodity bar codes.

References:

Baidu Encyclopedia-Commodity Barcode