2 thoughts on “How is the product barcode recognized?”
Gerard
The working principle of barcode recognition is mainly because when different colors of objects are reflected, the wavelength of our visible light will be different. Among them, white objects are visible light that can reflect various wavelengths. Black objects are visible light that can absorb various wavelengths. Therefore, the light source of the barcode scanner is reached on the black and white barcode after the light sources of the barcode scanner passed through the lapse and convex mirror 1. After the reflex of the light is focused by the convex lens 2, it was illuminated on the photoelectric converter.
So the photoelectric converter receives the reflected light signal that is different from the strength of white and black strips, and converts it to the corresponding electrical signal output to the amplifier. The telecommunications signal is translated into digital character information by the decoding interface circuit.
The width of the white and black strips of the barcode is different, and the corresponding length of the electrical signal duration is also different. However, as the output of the photoelectric converter and the barcode and the corresponding signal of the barcode are only about 10mv. It is not possible to use it directly, so you need to place the photoelectric output electrical signal to enlarge it in the amplifier, so that you can see the information of the product.
The barcode anti -theft of the supermarket uses electronic labels (not all products with), the front is barcode, and there is a miniature coil in the opposite side. The label cost is low, and directly adheres to the "hard" products. The soft label cannot be reused; The hard label is higher than the soft label, but it can be reused. The hard label must be equipped with a special nail extraction. Instruments are mostly used for soft and easy -to -penetrate items. Cripping requires decoder. Most of the decoders are non -contact devices, and there is a certain decoder height. When the cashiers are cashiers or bags, the electronic tags can be decoded without contacting the demagnetic area. The device that synthesizes the decoder and laser bar scanner together to achieve the one -time completion of the product collection and decoding to facilitate the work of the cashier. The interference between the two and improve the decoding sensitivity. The detector is generally a detection system device at the mall entrance or cashier channel. After receiving the correct payment of a customer to buy a certain product, the cashier can authorize the product and legally leave a designated area by authorizing the label pasted on the product. does not leave the mall without decoding. When the detector device (mostly the door) is triggered, the alarm will be triggered, so as to remind cashiers, customers and shopping mall security personnel to deal with it in time. Pucting information: The product barcode is an important part of the ANCC system and the basis for the development of the ANCC system. It is mainly used for barcode logos for retail goods, non -retail goods and logistics units. The main types of product barcode are: EAN-13/8 UPC-A/E ITF 14 EAN/UCC 128. The product barcode includes retail goods, non -retail goods, logistics units, location code and barcode logo. my country adopts international universal product code and barcode logo system, promotes the application of barcodes of commodity, and establishes my country's commodity identification system. The retail product refers to a product scanning and settlement through POS on the retail terminal. Its barcode logo consists of global trade project code (GTIN) and its corresponding barcode symbols. The barcode logo of retail products mainly use EAN/UPC barcode. The non -retail commodity refers to products that do not use POS scanning for delivery, warehousing or wholesale operations. Its logo code consists of global trade project code (GTIN) and its corresponding barcode symbols. The barcode symbols of non-retail products mainly use ITF-14 barcodes or UCC/EAN-128 barcodes, or EAN/UPC barcodes can also be used. A carton containing 24 cigarettes and a tray with 40 boxes of cigarettes can be wholesale and distribution as a non -retail product. The logistics unit bar code is a temporary combination packaging established to facilitate transportation or warehousing. It needs to track and manage itself in the supply chain. In the barcode label on each logistics unit to realize the link between the logistics and related information flow, you can track the physical movement of each logistics unit. The encoding of the logistics unit uses a series of freight packaging box code (SSCC-18) for identification. A box of 12 skirts with different colors and sizes and 20 jackets is packed. A tray containing 40 boxes of beverages (12 boxes per box) can be regarded as a logistics unit. The barcode technology was born with the development and application of computers and information technology. It is a new type of technology that combines coding, printing, identification, data collection and processing. The use of barcode scanning is the general trend of market circulation in the future. In order to enable goods to be free and widely circulated around the world, whether it is design and production, whether it is designing and making, applying for registration or using the product barcode, must follow the relevant provisions of the barcode management of the product. The birth of product barcode has greatly facilitated the circulation of goods. Modern society is inseparable from the barcode of the commodity. According to statistics, there are currently 500,000 products in my country that use the international commodity barcode. Irds will win more space for activity on the international stage after my country's joining the WTO. It is necessary to be in line with international practice and meet the needs of international economic and trade. Reference materials: Baidu Encyclopedia-Commodity bar code
The working principle of barcode recognition is mainly because when different colors of objects are reflected, the wavelength of our visible light will be different. Among them, white objects are visible light that can reflect various wavelengths. Black objects are visible light that can absorb various wavelengths. Therefore, the light source of the barcode scanner is reached on the black and white barcode after the light sources of the barcode scanner passed through the lapse and convex mirror 1. After the reflex of the light is focused by the convex lens 2, it was illuminated on the photoelectric converter.
So the photoelectric converter receives the reflected light signal that is different from the strength of white and black strips, and converts it to the corresponding electrical signal output to the amplifier. The telecommunications signal is translated into digital character information by the decoding interface circuit.
The width of the white and black strips of the barcode is different, and the corresponding length of the electrical signal duration is also different. However, as the output of the photoelectric converter and the barcode and the corresponding signal of the barcode are only about 10mv. It is not possible to use it directly, so you need to place the photoelectric output electrical signal to enlarge it in the amplifier, so that you can see the information of the product.
The barcode anti -theft of the supermarket uses electronic labels (not all products with), the front is barcode, and there is a miniature coil in the opposite side. The label cost is low, and directly adheres to the "hard" products. The soft label cannot be reused;
The hard label is higher than the soft label, but it can be reused. The hard label must be equipped with a special nail extraction. Instruments are mostly used for soft and easy -to -penetrate items.
Cripping requires decoder. Most of the decoders are non -contact devices, and there is a certain decoder height. When the cashiers are cashiers or bags, the electronic tags can be decoded without contacting the demagnetic area.
The device that synthesizes the decoder and laser bar scanner together to achieve the one -time completion of the product collection and decoding to facilitate the work of the cashier. The interference between the two and improve the decoding sensitivity.
The detector is generally a detection system device at the mall entrance or cashier channel. After receiving the correct payment of a customer to buy a certain product, the cashier can authorize the product and legally leave a designated area by authorizing the label pasted on the product.
does not leave the mall without decoding. When the detector device (mostly the door) is triggered, the alarm will be triggered, so as to remind cashiers, customers and shopping mall security personnel to deal with it in time.
Pucting information:
The product barcode is an important part of the ANCC system and the basis for the development of the ANCC system. It is mainly used for barcode logos for retail goods, non -retail goods and logistics units. The main types of product barcode are: EAN-13/8 UPC-A/E ITF 14 EAN/UCC 128.
The product barcode includes retail goods, non -retail goods, logistics units, location code and barcode logo. my country adopts international universal product code and barcode logo system, promotes the application of barcodes of commodity, and establishes my country's commodity identification system.
The retail product refers to a product scanning and settlement through POS on the retail terminal. Its barcode logo consists of global trade project code (GTIN) and its corresponding barcode symbols. The barcode logo of retail products mainly use EAN/UPC barcode.
The non -retail commodity refers to products that do not use POS scanning for delivery, warehousing or wholesale operations. Its logo code consists of global trade project code (GTIN) and its corresponding barcode symbols. The barcode symbols of non-retail products mainly use ITF-14 barcodes or UCC/EAN-128 barcodes, or EAN/UPC barcodes can also be used. A carton containing 24 cigarettes and a tray with 40 boxes of cigarettes can be wholesale and distribution as a non -retail product.
The logistics unit bar code is a temporary combination packaging established to facilitate transportation or warehousing. It needs to track and manage itself in the supply chain.
In the barcode label on each logistics unit to realize the link between the logistics and related information flow, you can track the physical movement of each logistics unit.
The encoding of the logistics unit uses a series of freight packaging box code (SSCC-18) for identification. A box of 12 skirts with different colors and sizes and 20 jackets is packed. A tray containing 40 boxes of beverages (12 boxes per box) can be regarded as a logistics unit.
The barcode technology was born with the development and application of computers and information technology. It is a new type of technology that combines coding, printing, identification, data collection and processing.
The use of barcode scanning is the general trend of market circulation in the future. In order to enable goods to be free and widely circulated around the world, whether it is design and production, whether it is designing and making, applying for registration or using the product barcode, must follow the relevant provisions of the barcode management of the product.
The birth of product barcode has greatly facilitated the circulation of goods. Modern society is inseparable from the barcode of the commodity. According to statistics, there are currently 500,000 products in my country that use the international commodity barcode.
Irds will win more space for activity on the international stage after my country's joining the WTO. It is necessary to be in line with international practice and meet the needs of international economic and trade.
Reference materials: Baidu Encyclopedia-Commodity bar code