Tuesday, February 27, 2024
Home Uncategorized What does the bar code behind the goods mean

What does the bar code behind the goods mean

by admin
0 comment

commodity bar codes are made up of a group of different thicknesses A graphic consisting of black and white or colored stripes used to represent the commodity code It is composed of bar code symbol, character code and blank area 1、 Bar code overview bar code was first proposed by N.T. woodland of the United States in 1949. In recent years, with the continuous popularization of computer application, the application of bar code has developed greatly. Bar code can mark the country of production, manufacturer, commodity name, production date, book classification number, starting and ending place, category, date and other information of goods, Therefore, it has been widely used in many fields, such as commodity circulation, book management, post and telecommunications management, banking system and so on A bar code is a graphic identifier made up of bars and spaces with different widths and reflectance according to certain coding rules (coding system), which is used to express a group of numeric or alphabetic symbol information, Arrange the parallel line pattern with certain spacing according to certain rules. The common bar code is composed of black bar (referred to as bar) and white bar (referred to as empty) with great reflectivity difference. Second, the composition of bar code recognition system. In order to read the information represented by bar code, a set of bar code recognition system is required, which consists of bar code scanner, amplification and shaping circuit Decoding interface circuit and computer system. III. principle of bar code scanner recognizing bar code. Due to the different wavelengths of visible light reflected by objects of different colors, white objects can reflect visible light of various wavelengths, while black objects absorb visible light of various wavelengths. Therefore, when the light emitted by the light source of bar code scanner passes through the diaphragm and convex lens 1, When irradiating the black-and-white bar code, the reflected light is focused by the convex lens 2 and irradiates on the photoelectric converter of the bar code scanner, so the photoelectric converter receives the reflected light signal with different strength corresponding to the white bar and black bar, converts it into the corresponding electrical signal and outputs it to the amplification and shaping circuit of the bar code scanner. The widths of the white bar and black bar are different, The duration of the corresponding electrical signal is also different. However, the electrical signal corresponding to the bar and empty bar code output by the photoelectric converter is generally only about 10mV and cannot be used directly. Therefore, the electrical signal output by the photoelectric converter must be sent to the amplifier for amplification. The amplified electrical signal is still an analog electrical signal, In order to avoid the wrong signal caused by the defects and stains in the bar code, a shaping circuit needs to be added after the amplification circuit to convert the analog signal into digital electrical signal, so that the computer system can accurately interpret. The pulse digital signal of the shaping circuit is translated into digital and character information through the decoder Stop character to distinguish the code system and scanning direction of bar code symbol; The number of bars and spaces is determined by measuring the number of pulse digital electrical signals 0 and 1. The width of bars and spaces is determined by measuring the duration of 0 and 1 signals. In this way, the number of bars and spaces of bar code symbols to be read, the corresponding width and the code system used are obtained. According to the coding rules corresponding to the code system, The bar code scanner can change the bar symbols into corresponding digital and character information, and send it to the computer system for data processing and management through the interface circuit, so as to complete the whole process of bar code identification and reading. EAN-13 general commodity bar code is generally composed of prefix part, manufacturer’s code, commodity code and verification code. The prefix code in the commodity bar code is the code used to identify the country or region. The code right is assigned to the international article coding Association, such as 00-09, which represents the United States and Canada. 45-49 stands for Japan. 690-692 represents the Chinese mainland, 471 represents the Taiwan region of China, and the 489 represents the Hongkong Special Administrative Region. The empowerment of manufacturer code is an article coding organization in various countries or regions. In China, the national article coding center gives the manufacturer code. The commodity code is the code used to identify the commodity. The right to assign the code is exercised by the product manufacturer. The manufacturer decides which Arabic numerals to use on its own commodity according to the specified conditions. Finally, the 1-digit check code is used to check the correctness of the number l-12 from the left in the commodity bar code. Full text: commodity bar code refers to the symbol composed of a group of regularly arranged bars, spaces and their corresponding characters, which is used to represent certain commodity information. The bar is dark and the blank is nano, which is used for scanning and reading of bar code reading equipment. The corresponding characters are composed of a group of Arabic numerals for people to read directly or input data to the computer through the keyboard. The information represented by this group of blank bars and the corresponding characters is the same. With the birth and development of bar code technology, it is a combination of information acquisition, coding and data processing technology. Using bar code scanning is the general trend of market circulation in the future. In order to make commodities circulate freely and widely all over the world, enterprises must abide by the relevant provisions of commodity bar code management, whether designing and manufacturing, applying for registration or using commodity bar code. At present, the commonly used code systems in the world include ENA bar code, UPC bar code, 25 bar code, cross 25 bar code, kudeba bar code, 39 bar code and 128 bar code, and ean bar code is the most commonly used commodity bar code. Ean commodity bar code, also known as general commodity bar code, is formulated by the international article coding Association and is widely used all over the world. It is the most widely used commodity bar code in the world. At present, this kind of commodity bar code is also used in China. Ean commodity bar codes are divided into EAN-13 (Standard Version) and ean-8 (shortened version). EAN-13 general commodity bar code is generally composed of prefix part, manufacturer code, commodity code and verification code. The prefix code in the commodity bar code is the code used to identify the country or region. The code right is assigned to the international article coding Association, such as 00-09, which represents the United States and Canada. 45-49 stands for Japan. 690-692 represents the Chinese mainland, 471 represents the Taiwan region of China, and the 489 represents the Hongkong Special Administrative Region. The empowerment of manufacturer code is an article coding organization in various countries or regions. In China, the national article coding center gives the manufacturer code. The commodity code is the code used to identify the commodity. The right to assign the code is exercised by the product manufacturer. The manufacturer decides which Arabic numerals to use on its own commodity according to the specified conditions. Finally, the 1-digit check code is used to check the correctness of the number l-12 from the left in the commodity bar code. The coding of commodity bar code follows the principle of uniqueness to ensure that the commodity bar code is not repeated all over the world, that is, a commodity item can only have one code, or a code can only identify one commodity item. Different commodity codes can only be used for commodities with different specifications, different packages, different varieties, different prices and different colors. The standard size of commodity bar code is 37.29mmx26 26mm, magnification is 0.8-2.0. When the printing area allows, the barcode with a magnification of more than 1.0 shall be selected to meet the reading requirements. The smaller the magnification, the higher the printing accuracy. When the printing accuracy can not meet the requirements, it is easy to make it difficult to read the bar code. Since the barcode reading is realized through the bar and empty color contrast of the barcode, generally, as long as the color that can meet the requirements of contrast (PCS value) can be used. Generally, light colors are used as empty colors, such as white, orange, yellow, etc., and dark colors are used as strips, such as black, dark green, dark brown, etc. The best color match is black strip and white space. According to the practical experience of bar code detection, red, gold and light yellow should not be used as bar colors, and transparent and gold should not be used as empty colors. Ean-8 commodity bar code refers to the commodity bar code with 8 digits for identification, which is composed of commodity item code represented by 7 digits and check symbol represented by 1 digit. The birth of commodity bar code has greatly facilitated commodity circulation. Modern society is inseparable from commodity bar code. According to statistics, at present, 500000 kinds of products in China have used international commodity bar codes. After China’s accession to the WTO, enterprises will win more activity space on the international stage. To be in line with international practices and meet the needs of international economy and trade, enterprises can not wait for commodity bar codes. Bar code prefix code of some countries and regions (EAM) members, United States Canada 00-09 Israel 729 Denmark 57 (in store code) 20-29 Venezuela 759 Norway 70 Japan 45-49 Uruguay 773 Switzerland 76 Belgium /Luxembourg 54 Bolivia 773 Spain 84 Finland 64 Chile 780 Austria 90-91 Sweden 73 Ecuador 786 New Zealand 94 Italy 80-83 Cuba 850 Slovenia 383 Netherlands 87 Czech 859 Germany 400-440 Australia 93 South Korea 880 Taiwan 471 Bulgaria 380 Singapore 888 Latvia 475 Croatia 385 Malaysia Asia 893 Sri Lanka 479 Russia 460-469 Vietnam 977 Hong Kong 489 Estonia 474 Mexico 750 Cyprus 529 Lithuania 477 Colombia 770 Malta 535 Philippines 480 Peru 775 Portugal 560 Greece 520 Argentina 779 Poland 590 Macedonia 531 Paraguay 784 Hungary 599 Ireland 539 Brazil 789 Mauritius 609 Iceland 569 Slovakia 858 Albania 613 Romania 594 Yugoslavia 860 Chinese mainland 690-692 South Africa 600-601 Thailand 885 France 30-37 Morocco 611 India 890 England 50 Turkey 619, 869 Indonesia 899

You may also like

Leave a Comment

Soledad is the Best Newspaper and Magazine WordPress Theme with tons of options and demos ready to import. This theme is perfect for blogs and excellent for online stores, news, magazine or review sites.

Buy Soledad now!

Edtior's Picks

Latest Articles

u00a92022u00a0Soledad.u00a0All Right Reserved. Designed and Developed byu00a0Penci Design.