Question 2: What information does the barcode contain? Bar code is a graphic identifier that arranges a plurality of black bars and blanks with different widths according to certain coding rules to represent a group of information. Daily life mainly represents numbers, which are generally registered and marked by manufacturers. The main purpose is to facilitate machine identification! Generally speaking, 69 stands for Chinese mainland, 47/KLOC-0 stands for Taiwan Province Province of China, and 489 stands for Hong Kong Special Administrative Region. At the same time, it must abide by a rule: sort the bar code from right to left as "1, 2, 3, 4 ..." Starting from the second sequence, sum all the numbers on even digits, multiply the calculated sum by three, then sum all the numbers on odd digits, add the numbers on even digits with the calculated sum, and then get the sum. Then subtract the single digits of this sum with 10 to get the check code.
baike.baidu/...wX_m9_
The above is very clear, I hope I can help you.
Question 3: Bar code, what information does it contain? EAN- 13 general commodity bar code generally consists of prefix, manufacturer code, commodity code and check code. The prefix code in commodity bar code is used to identify the country or region, and the code is given in ean international. For example, 00-09 stands for the United States and Canada. 45-49 stands for Japan. 690-692 stands for Chinese mainland, 47 1 stands for Taiwan Province Province and 489 stands for Hong Kong Special Administrative Region. The empowerment of manufacturers' codes is organized by article codes in various countries or regions, while in China, the National Article Coding Center gives manufacturers' codes. Commodity codes are codes used to identify commodities, and the right to assign codes is exercised by the product manufacturers themselves. Manufacturers decide which * * * numbers to use on their products according to the specified conditions. At last, the 1 parity code is used to check the correctness of the L- 12 digital code from the left in the barcode.
Full text:
Commodity barcode refers to a symbol composed of a group of regularly arranged bars, spaces and their corresponding characters, which is used to represent certain commodity information. Among them, the bar is dark and empty, which is a reading device used to scan and read bar codes. Its corresponding characters are composed of a group of * * * numbers, which can be used for people to directly read or input data to the computer through the keyboard. This set of spaces and corresponding characters represent the same information.
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.
At present, ENA barcode, UPC barcode, 25 barcode, cross barcode, Kudba barcode, Sanjiu barcode and 128 barcode are commonly used in the world, among which EAN barcode is the most commonly used commodity.
EAN commodity bar code, also known as general commodity bar code, is formulated by ean international and is widely used in the world. It is the most widely used commodity bar code in the world. At present, this commodity bar code is being used in China. EAN commodity bar codes are divided into EAN- 13 (standard version) and EAN-8 (abbreviated version).
EAN- 13 general commodity bar code generally consists of prefix, manufacturer code, commodity code and check code. The prefix code in commodity bar code is used to identify the country or region, and the code is given in ean international. For example, 00-09 stands for the United States and Canada. 45-49 stands for Japan. 690-692 stands for Chinese mainland, 47 1 stands for Taiwan Province Province and 489 stands for Hong Kong Special Administrative Region. The empowerment of manufacturers' codes is organized by article codes in various countries or regions, while in China, the National Article Coding Center gives manufacturers' codes. Commodity codes are codes used to identify commodities, and the right to assign codes is exercised by the product manufacturers themselves. Manufacturers decide which * * * numbers to use on their products according to the specified conditions. At last, the 1 parity code is used to check the correctness of the L- 12 digital code from the left in the barcode.
The coding of commodity bar codes follows the principle of uniqueness, so as to ensure that commodity bar codes will not be repeated in the global scope, that is, a commodity item can only have one code, or a code can only identify one commodity item. Commodities with different specifications, different packages, different varieties, different prices and different colors can only use different commodity codes.
The standard size of commodity bar code is 37.29mmx26.26mm, and the magnification is 0.8-2.0. When the printing area allows, the barcode with magnification of 1.0 should 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 read the bar code.
Because the identification of bar code is realized by the color contrast between bar code and blank bar code, generally speaking, as long as the color can meet the requirements of contrast (PCS value), light color can be used as blank color, such as white, orange and yellow, and dark color as bar, such as black, dark green and dark brown. The best color scheme is black stripes and white spaces. According to the practical experience of bar code detection, red, gold and light yellow should not be used as bar code colors, and transparent and gold should not be used as blank colors.
EAN 8 commodity bar code refers to the quotient of 8-digit code used for identification. & gt
Question 4: What are the one-dimensional codes in bar codes?
One-dimensional bar code consists of a group of bars and empty symbols arranged according to certain rules.
Can represent characters, numbers, symbols and other information; There are about twenty common ones, such as EAN- 13, Code39, UPC-A, etc.
EAN series: ean international general commodity bar code;
UPC series: Uniform Code Committee of the United States. One-dimensional bar codes, which are popular in the United States, consist of a set of bars and blank symbols arranged according to specific rules. Can represent characters, numbers, symbols and other information; There are about twenty common ones: such as EAN- 13, Code39, UPC-A, etc. EAN series: ean international general commodity bar code;
UPC series: American Uniform Code Committee, popular in the United States and Canada;
Code39: complete structural design, with certain error correction ability, widely used in industry, books and tickets;
Codebar: used in medical, logistics and other industries;
QR code
Due to the limited capacity of one-dimensional codes, most of them need database support; Then, for this reason, on the basis of one-dimensional code theory, two-dimensional code appeared in the 1990s. QR codes can store not only numbers, but also pictures, sounds, fingerprints and other information.
Common QR codes include QR code, PDF4 17 code, data matrix code, Maxicode code, DESOFT code and so on.
QR code: Invented by Denso Corporation of Japan, it is widely used because it can store Chinese characters and quickly identify them.
PDF4 17: Invented the American symbol (now Motorola), which was widely used by American companies;
Data Matrix: Invented by American ID Matrix, its performance is better than PDF4 17.
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Traceability from Guangzhou: Internet of Things, enterprise mobile application, traceability, barcode &RFID.
Question 5: What are the types of commodity bar codes? One-dimensional barcode:
EAN 8 (2 or 5 digit supplement)
EAN 13(2 or 5 digit supplement)
Codabar (Monarch, NW-7, USD-4, 2 of 7 yards)
Code 39 standard
Code 39 extension
Code 93 standard
Code 93 extension
Code 128
AbcCodabar
2/5 Data Logic, Code 25, Page 2 of 5
Code 1 1 (USD -8)
Code 25, Page 2 of 5, ITF
Code 25, 2/5 matrix
Code 25, 2/5 Industry
Code25，2/5 IATA
Code 25, 2/5 inversion
ITF6，ITF 14 (SSC 14)，ITF 16
International Standard Book Number (ISBN)
International standard serial number
ISMN (international standard music number)
UPC-A (with or without supplement)
UPC-E0 (with or without supplement)
UPC-E 1 (with or without supplement)
UPC- transportation
Postal network (postal code, postal code +4, DPBC)
Optical industry association
UCC/EAN 128
Description:
EAN
courtyard
EAN
Bar code is a kind of bar code formulated by ean international.
Has been used all over the world.
90
Many countries and regions,
EAN
Bar code symbols are standard versions and
There are two shortened versions, and the standard version consists of
13
Numbers, abbreviated version by
eight
Digital composition, China is at
199 1
Join in
EAN
Organization.
Unit Production Costs (unit production costs)
courtyard
and
EAN
Such as bar codes,
Unit Production Costs (unit production costs)
Bar code is also a kind of bar code used for goods.
Unit Production Costs (unit production costs)
Bar code is a kind of bar code formulated by the United States Uniform Code Committee.
Mainly used in the United States and Canada.
In order to meet the demand of North America,
It also applies.
Unit Production Costs (unit production costs)
Bar code.
Unit Production Costs (unit production costs)
There are two kinds of bar codes: the standard version and the shortened version. The standard version includes
12
Number combination, abbreviated form
eight
Bits and numbers.
Three or nine yards:
Sanjiu code is a discontinuous code that represents information with bars and spaces, and can represent numbers.
0-9
, letters
A-Z
And eight control characters (
-
, spaces,
/
,
$,
+
,
%
,
?
,
*
) and so on
Forty-four
Characters, mainly used for the automatic management of industry, books and bills.
Kudba (
Code column
) code:
Kudba (
Code column
) code is a discontinuous, variable-length, bidirectional self-checking bar code, which can represent numbers.
0-9
, the word ... >>
Question 6: What information does the bar code on the things sold in the supermarket contain?
Bar code is just a carrier, depending on what information is input when the supermarket enters the warehouse.
Question 7: What does the book bar code include? ISBN consists of 13 digits: the first three digits represent books, the middle nine digits are divided into three groups, representing group number, publishing house number and book serial number respectively, and the last digit is the check code.
The problem of entry can't be solved only by book number, and the most obvious and serious thing is that the title can't be obtained;
At present, the only way to solve this kind of problem is:
When buying books, booksellers provide the marking data or text data of the corresponding books, and then import them into the database in batches!
Question 8: What are the concepts and types of bar codes?
The concept of bar code
Bar code is a special code that can be read by photoelectric scanning reading equipment and input data into computer. It is composed of a group of lines, spaces with different thicknesses and their corresponding characters, numbers and letters, alternating with black and white or color, which are used to represent a certain information.
Type of barcode
Ean barcode: It is a kind of barcode developed by EAN International, that is, universal commodity barcode, which is used all over the world and belongs to one-dimensional barcode.
UPC barcode: A kind of one-dimensional barcode, formulated by the Uniform Coding Committee of the United States and mainly used in the United States and Canada.
Sanjiu barcode: It is a discontinuous barcode, which represents information in two ways: stripes and spaces. It can represent 43 characters, such as numbers 0-9, letters A-z and-,spaces and so on. It is mainly used for the automatic management of industry, books and bills.
Kudba bar code: It is a discontinuous, variable-length and bidirectional self-checking bar code, which can represent information with stripes or spaces, and can represent special characters such as numbers 0-9, letters A-z and-,+.
Barcode: It is a kind of discontinuous bar code, only bars represent information, and the interval between bars with equal distance does not represent information.
Cross 25 bar code: It is a continuous code with the same coding principle as 25 bar code, but the interval between bars is part of the information.
Matrix 25 barcode: it is a kind of barcode, and the barcode symbols are arranged in a 4w5 matrix, representing a four-digit number, with the position with bars representing the logic "1" and the position without bars representing the logic "0".
Bar code: it is an independent bar code with strong self-checking function and high density.
Two-dimensional bar code: it is a dot matrix bar code composed of dots and spaces. It can be used without the support of database. In fact, it is a portable data file with high density and high information content. It has the technical characteristics of large information capacity, wide coding range, strong error correction ability, high decoding reliability and strong anti-counterfeiting ability, and can be widely used in various fields. Concept of commodity bar code
Commodity bar code is a commodity logo which is composed of a group of regularly arranged bars, spaces and their corresponding characters and represents certain information. Commodity bar codes include standard version and shortened version. The standard version of commodity bar code consists of manufacturer identification code, commodity item code and check code. Commodity bar code abbreviation consists of commodity item identification code and check code.
Question 9: What's the use of bar codes? bar code
I. Overview of Barcode
Bar code was first proposed by N.T.Woodland of the United States in 1949. In recent years, with the popularization of computer application, the application of bar code has been greatly developed. Barcode can indicate the country of production, manufacturer, product name, date of production, book classification number, mailing place, category, date and other information. Therefore, it is widely used in many fields, such as commodity circulation, book management, post and telecommunications management, banking system and so on. Bar code is a graphic identifier composed of bars and spaces with different widths and reflectivity, which is compiled according to certain coding rules (coding system) to represent a group of numerical or alphabetic symbol information. That is, bar code is a group of parallel lines with different thicknesses and arranged at regular intervals. Common bar codes are composed of black bars (abbreviated as bars) with different reflectivity.
Second, the composition of the bar code identification system
In order to read the information represented by bar code, a bar code recognition system is needed, which consists of bar code scanner, amplification and shaping circuit, decoding interface circuit and computer system.
Third, the principle of bar code scanner to identify bar codes
Because different colors reflect different wavelengths of visible light, white objects can reflect various wavelengths of visible light, while black objects absorb various wavelengths of visible light. Therefore, when the light emitted by the light source of the barcode scanner is irradiated onto the black and white barcode through the diaphragm and the convex lens 1, the reflected light is focused by the convex lens 2 and then irradiated onto the photoelectric converter in the barcode scanner. Therefore, the photoelectric converter receives reflected light signals with different intensities corresponding to white bars and black bars, converts them into corresponding electrical signals and outputs them to the amplification and shaping circuit of the bar code scanner. The widths of white bars and black bars are different, and the duration of corresponding electrical signals is also different. However, the electrical signal output by photoelectric converter corresponding to the bar and space of bar code is generally only about 10mV, so it cannot be used directly. Therefore, the electrical signal output by the photoelectric converter should be sent to the amplifier for amplification. The amplified electrical signal is still analog. In order to avoid false signals caused by defects and stains in bar codes, a shaping circuit should be added after the amplification circuit to convert analog signals into digital electrical signals so that the computer system can accurately interpret it. The pulse digital signal of the shaping circuit is converted into digital and character information by the decoder. It can identify the coding system and scanning direction of bar code symbols by identifying the start and end characters. By measuring the number of pulse digital electrical signal 0, 1, the number of bars and spaces can be determined, and by measuring the duration of signal 0, 1, the width of bars and spaces can be determined. Therefore, the number of bars and spaces for bar code symbols and the corresponding width and code system can be obtained. According to the coding rules corresponding to the coding system, barcode scanner converts the bar code symbols into corresponding digital and literal information, and sends them to the computer system for data processing through the interface circuit.
More details UK/Shi Zhi
The application of barcode has the following advantages:
1. Reliable and accurate. It can be concluded that keyboard input has an error every 300 characters on average, while barcode input has an error every 15000 characters on average. If you add check, the error rate is one in ten million.
2. Fast data entry. Keyboard input, a typist who types 90 words per minute can input 12 characters or strings in 1.6 seconds, while using bar code, the same work takes only 0.3 seconds, which is five times faster.
3. The economy is cheap. Compared with other automatic identification technologies, the popularization and application of bar code technology takes a long time and costs less.
4. Flexible and practical. As a means of identification, bar code symbols can be used alone, or can be combined with related equipment to form an identification system to realize automatic identification, and can also be linked with other control equipment to realize automatic management of the whole system. At the same time, when there is no automatic identification device, manual keyboard input can be realized.
5. Great freedom. The degree of freedom of the relative position between the identification device and the barcode label is much greater than OCR. Barcodes usually only express information in one dimension, but the information expressed in the same barcode is exactly the same. & gt
Question 10: What are the application areas of bar code that need to start with the coding principle of bar code?
Barcode encodes and converts a string of characters (a combination of numbers and letters, such as B2009A).
Become a strip+virtual image;
The bar code label printed by the bar code printer is the process of transforming the character string into the image (bar code in the label);
The image corresponds to the code of the character string and can be recognized and decoded by the optical device.
These optical devices are the core components of ordinary scanning guns or collectors.
For example, a scanning gun adds an empty image through its internal optical identification bar, and then decodes the character string.
Then output to the computer port (USB or serial port), and the application can go to the port to read the string corresponding to the barcode.
Then do application logic processing (such as querying the price and manufacturer of the clothing style corresponding to the barcode, etc.). ).
Barcodes can represent characters, numbers, symbols and other information; There are about twenty common ones, such as EAN- 13, Code39, UPC-A, etc.
Barcodes on the barcode labels are printed by the barcode label printer, and each barcode corresponds to a group of barcode numbers.
Different codes and numbers print different bar code graphics.
Bar code recognition machine (such as bar code scanner, collector, etc.). ) decoding by recognizing the bar code pattern;
The numbers below the bar code graphics are printed to see the numerical values represented by the bar code, which are mainly read by human eyes;
The number recognition machine in barcode mode is not concerned.
In short, the general process is:
Bar code number-> Printer printing-> Bar code graphic label->; Stick it on an object-> Scanner barcode graphics->; Scanner identification and decoding->; Get the barcode number-> System application processing ...
The commodity code is an external public bar code. You can apply to the National Commodity Coding Center for a universal commodity bar code, using EAN- 13. There are fixed rules on how to code.
If it is for internal use, you can also use the internal barcode, that is, you can edit it according to your own use. If it is unique, you can use product number+production date+serial number. If it is batch management, you can use product number+production batch ... and then use barcode printing software+barcode printer to make it!
Method and application of bar code coding;
1 Don't think too abstruse and omnipotent about bar codes. Bar codes are just a set of strings.
Whether it is meaningful, what it means and what it represents are all designed by users themselves.
It is similar to an ID number, except that this barcode can be graphical and can be scanned without manual input.
Barcodes can be divided into commodity codes and internal codes.
Commodity code: EAN 13 code, managed by national coding center.
Used to indicate the product and model of a specific manufacturer,
Generally, it consists of manufacturer, product code, price and other information.
Commodity codes can be scanned and identified in major shopping malls because they are managed by coding centers.
Internal code: it is a bar code that enterprises can freely design according to their own needs.
There is no uniform regulation, which can be used in employee ID, equipment ID, product ID, product packaging ID, raw material batch number, etc.
You can make it up as you like anyway.
You may ask, how to identify information?
Barcodes themselves can contain necessary information, just like commodity codes.
It can also be any unique number (such as date+serial number).
Then, when the barcode is published, the complete information corresponding to the ID is stored in the background database.
In this way, when the system scans the bar code, it can go to the database to find out its corresponding information and make it meaningful!
3 unit code, batch code and category code
A, the barcode can be unique, for example, give each commodity a unique barcode, which is the item code at this time, and the quantity is1;
B, the barcode can also represent a batch of goods, such as a batch of raw materials, which is the batch code, and the quantity can be greater than1;
C. Barcodes can also represent a commodity, such as issuing corresponding barcodes for products of different brands, models and specifications.
You need to enter the quantity after scanning the barcode;
Barcode is a number, and its significance lies in how you design and use it. I don't know, do you understand?
Production barcode:
1 You can order from the barcode label manufacturer and tell you the style requirements and quantity. (contact LENX)
2 Buy one yourself ... >>
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