Question 2: What information does the bar code contain Barcode (barcode) is a number of black bars of varying widths and blanks, arranged in accordance with certain coding rules to express a set of information graphic identifiers, in daily life, the main representation of the numbers, those numbers are generally registered by the manufacturer and labeled on the code, the main purpose is to facilitate the identification of the machine! In general, 69 represents China, 471 represents Taiwan, and 489 represents Hong Kong SAR. At the same time it must also comply with a rule: the bar code from right to left in order to compile the serial number for "1,2,3,4 ......" from the serial number two to start all the even number of serial numbers on the number of digits added and summed, with the sum multiplied by 3, and then all the odd number of serial numbers on the number of digits added and summed, with the sum multiplied by 3! Add all the numbers in the odd numbered positions, then add the sum to the number in the even numbered position, then sum the sum. Subtract the number of digits of this sum from 10 to get the checksum.
baike.baidu/.... .wX_m9_
The above is very clear, I hope to help you
Question 3: The bar code, how to see, contains what information about the goods EAN-13 Universal Commodity Barcode is generally composed of a prefix part, the manufacturer's code, the commodity code, and the check digit. Commodity bar code prefix code is used to identify the country or region of the code, the right to assign the code in the International Article Numbering Association, such as 00-09 on behalf of the United States, Canada. 45-49 on behalf of Japan. 690-692 on behalf of mainland China, 471 on behalf of China's Taiwan, 489 on behalf of the Hong Kong SAR. Manufacturer code is empowered in each country or region of the article code organization, China by the National Article Coding Center to give the manufacturer code. Commodity code is used to identify the code of the goods, the right to assign the code by the product manufacturer to exercise their own, the manufacturer in accordance with the conditions of the provisions of their own decision on what kind of goods they use which *** numbers for the commodity bar code. Commodity barcode last with a check digit to verify the correctness of the commodity barcode in the left from the first l-12 digital code.
Full text:
Commodity bar code refers to a set of rules arranged by the bar, empty and its corresponding characters composed of signs, to indicate a certain commodity information symbols. Among them, the bar is dark, empty for the color, for barcode reading equipment scanning and reading. Its corresponding characters by a group of *** digital composition, for people to read directly or through the keyboard to the computer to input data to use. This set of empty bars and the corresponding characters represent the same information.
Barcode technology is born with the development and application of computers and information technology, which is a new type of technology that integrates coding, printing, recognition, data acquisition and processing.
The use of barcode scanning is a major trend in future market circulation. In order to make the goods can be in the world free and extensive circulation, the enterprise whether design and production, application for registration or use of commodity bar code, must follow the relevant provisions of the commodity bar code management.
At present, the world's commonly used code system has ENA barcode, UPC barcode, two-five barcode, cross two-five barcode, Kudumba barcode, three-nine barcode and 128 barcode, etc., and commodities on the most commonly used is the EAN commodity barcode.
The EAN commodity bar code, also known as the Universal Commodity Bar Code, was developed by the International Article Numbering Association (IANA) and is commonly used around the world, and is one of the most widely used commodity bar codes in the world at present. It is the most widely used commodity barcode in the world, and is currently used in China. EAN commodity barcode is divided into EAN-13 (standard version) and EAN-8 (shortened version).
The EAN-13 universal commodity barcode is generally composed of a prefix, a manufacturer's code, a commodity code, and a check digit. Commodity bar code prefix code is used to identify the country or region of the code, the right to assign the code in the International Article Numbering Association, such as 00-09 on behalf of the United States, Canada, 45-49 on behalf of Japan, 690-692 on behalf of mainland China, 471 on behalf of China's Taiwan, 489 on behalf of the Hong Kong SAR. Manufacturer code is empowered in each country or region of the article code organization, China by the National Article Coding Center to give the manufacturer code. Commodity code is used to identify the code of the goods, the right to assign the code is exercised by the product manufacturer, the manufacturer in accordance with the conditions of the provisions of their own decision on what kind of goods they use which *** numbers for the commodity bar code. Commodity bar code with a check digit to verify the correctness of the commodity bar code in the left from the first l-12 digital code.
The code of the commodity bar code follows the principle of uniqueness to ensure that the commodity bar code is not duplicated throughout the world, that is, a commodity item can only have a code, or a code can only identify a commodity item. Different specifications, different packaging, different varieties, different prices, different colors of goods can only use different commodity code.
The standard size of the commodity bar code is 37.29mm x 26.26mm, magnification is 0.8-2.0. When the printing area allows, should choose 1.0 times the bar code to meet the literacy requirements. The smaller the magnification of the bar code, the higher the printing accuracy requirements, when the printing accuracy can not meet the requirements, easy to cause bar code reading difficulties.
As the barcode reading is achieved through the barcode bar and empty color contrast, in general, as long as the contrast (PCS value) to meet the requirements of the color can be used. Usually light colors are used for the empty color, such as white, orange, yellow, etc., and dark colors are used for the bar color, such as black, dark green, dark brown, etc. The best color combination is black bar, white bar, dark brown bar. The best color combination is black and white. According to the practical experience of barcode detection, red, gold, light yellow should not be used as the color of the bar, transparent, gold can not be used as the color of the empty.
EAN-8 commodity bar code is the digital code used to identify the 8-bit commercial ...... >>
Question 4: What are the barcodes One-dimensional code
One-dimensional barcode consists of a set of bars and empty symbols arranged according to certain rules.
Can represent characters, numbers, symbols and other information; common about two dozen: such as EAN-13, Code39, UPC-A and so on.
EAN series: the International Article Numbering Association developed by the world's common commodity bar code;
UPC series: the United States Uniform Code Council, prevailing in the United States of America, a one-dimensional bar code consists of a set of rules arranged in accordance with a certain bar, empty symbols. Can represent characters, numbers, symbols and other information; common about twenty kinds: such as EAN-13, Code39, UPC-A, etc.; EAN series: the International Article Numbering Association developed by the world's common commodity bar code;
UPC series: the U.S. Uniform Code Council, prevailing in the United States, Canada;
Code39: the structure of the complete design, with a certain degree of error correction capabilities, is widely used in the United States, Canada, and other countries.
Code39: complete structural design, with a certain degree of error correction, widely used in industry, books and tickets;
Codebar: used in the medical, logistics and other industries;
Two-dimensional code
Due to the limited capacity of the one-dimensional code, most of the logging needs database support; so for this reason, in the theory of the one-dimensional code on the basis of two-dimensional code appeared in the 1990s; two-dimensional code can not only store numbers, but also can store data, and can also be used to store data, and so on. Not only can it store numbers, but also pictures, sounds, fingerprints and other information.
Common two-dimensional codes include: QR code, PDF417 code, Data Matrix code, Maxicode code, DESOFT code, etc.;
QR code: invented by Japan's DENSO company, which is widely used due to its ability to store Chinese characters and recognize them quickly;
PDF417 code: invented by the U.S. SYMBOL (now MOTOROLA). MOTOROLA) invention, the United States companies apply more;
Data Matrix: the United States ID Matrix invention, performance is stronger than PDF417.
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From the Guangzhou Traceability: Internet of Things, enterprise mobile applications, traceability, barcode & RFID
Question 5: What is the most important thing to do? p>
Question 5: What types of commodity barcodes are included? 1D barcode:
EAN 8 (2 or 5 digit supplement)
EAN 13 (2 or 5 digit supplement)
Codabar (Monarch, NW-7, USD-4, 2 of 7 code)
Code 39 Standard
Code 39 Extended
Code 93 Standard
Code 93 Extended
Code 128
AbcCodabar
2/5 Datalogic,Code25, 2 of 5
Codabar (Monarch, NW-7, USD-4, 2 of 7 code)
Codabar (Monarch, NW-7, USD-4, 2 of 7 code) 2/5 INVERT
ITF6, ITF14 (SSC14), ITF16
ISBN (International Standard Book Number)
ISSN (International Standard Serial Number) <
ISMN (International Standard Music Number)
UPC-A (with or without supplements)
UPC-E0 (with or without supplements)
UPC-E1 (with or without supplements)
UPC-Shipping
PostNet (ZIP, ZIP+4, DPBC)
OPC (Optical Industry Association)
UCC/ EAN 128
Description:
EAN
Code
EAN
Barcode is a barcode developed by the International Article Numbering Association (IANA),
which is used in more than 90 countries and regions around the world
EAN
barcode symbologies include The standard version consists of
13
digits and the shortened version consists of
8
digits.
China joined the
EAN
organization in
1991
.
UPC
code
and
EAN
barcode,
UPC
barcode is also a kind of barcode used for commodities,
UPC
barcode is a kind of barcode developed by the United States Uniform Code Council
mainly used in the United States and Canada. and the United States and Canada.
Some of the goods exported to North America in order to adapt to the needs of North America,
also applied for the
UPC
barcode.
UPC
There are two types of UPC barcodes, the standard version consists of
12
digits and the shortened version consists of
8
digits.
Triple Nine:
Triple Nine is a non-continuous code that represents information in both bars and blanks, and can represent numbers
0-9
, letters
A-Z
, and eight control characters (
-
, spaces,
/
,
).
$,
+
,
%
,
?
,
*
), etc.
44
Characters, mainly used in industry, book and bill automation. >>
Question 6: What information is contained in the bar code on the things sold in the supermarket Not the bar code is very much that information
The bar code is just a carrier, depending on the supermarket in the inventory, the information entered
Question 7: What is the content of the book bar code International Standard Book Number consists of 13 digits: the first three digits on behalf of the book, the middle nine digits are divided into three groups, the first three digits are divided into three groups. The first three digits represent the book, the center of the nine figures are divided into three groups, respectively, the group number, publisher number and book serial number, the last figure is the check digit.
With this book number alone, it is not possible to solve the problem of entry, the most obvious one is also the most heavy ding that the name of the book can not be obtained;
At present, this kind of problem can only be solved as follows:
Procurement of books, booksellers to provide the corresponding books of the Mark data or text data, and then imported into the database in batches!
Question 8: Barcode a **** what kinds of Barcode concept and types
Barcode concept
Barcode is the use of photoelectric scanning and reading equipment to read and realize the data into the computer a special code. It is made up of a set of different thickness, black and white or colorful bars, empty and its corresponding characters, numbers, letters composed of marks, to indicate a certain information.
Types of barcodes
EAN barcode: It is a barcode developed by the International Article Numbering Association (IANA), i.e., Universal Article Number (UAN), which is common all over the world and is a one-dimensional barcode.
UPC barcode: a one-dimensional barcode, developed by the Uniform Code Council of the United States, mainly used in the United States and Canada.
Sanjiu barcode: a non-continuous barcode that represents information in both bars and blanks, and can represent 43 characters such as numbers 0--9, letters A--Z and -, spaces, etc. It is mainly used for automated management of industry, books, and bills.
Kudelbar: It is a kind of non-continuous, variable length, two-way self-checking barcode that indicates information in bar and space, and can indicate numbers 0--9, letters A--Z and special characters such as -, +, etc. It is mainly used in industry, books and automatic management of bills.
Two-five barcode: It is a kind of non-continuous barcode that only bar indicates information, and the interval between bars and equal distance between bars does not indicate information.
Cross 2-5 barcode: It is a continuous code with the same coding principle as 2-5 barcode, but the interval between bars is compiled as part of the information.
Matrix 2.5 barcode: It is a barcode that arranges the barcode symbols into a 4w5 matrix, which represents a four-digit number, and the position of the bar indicates a logical "1", and the position of the non-bar indicates a logical "0".
One-by-one barcode: It is a separated barcode with strong self-checking function and high density.
2D barcode: It is a kind of dot-matrix barcode composed of points and blanks, which can be used without database support, and is actually a kind of high-density, high-information-volume portable data file with technical characteristics such as large information capacity, wide coding range, strong error-correcting ability, high reliability of decoding, and strong anti-counterfeiting ability, which can be widely used in various fields. The concept of commodity barcode
Commodity barcode is a set of rules arranged by a group of bars, empty and its corresponding characters composed of a certain information to indicate the commodity identification. Commodity bar code includes standard version of the commodity bar code and shortened version of the commodity bar code. The standard version of the commodity bar code by the manufacturer identification code, commodity item code and check code. The shortened version of the commodity bar code consists of commodity item identification code and check digit.
Question 9: What is the use of barcode? Barcode
I. Overview of barcode
Barcode is by the United States N. T. Woodland in 1949, first proposed. In recent years, with the popularization of computer applications, the application of bar codes has been greatly developed. Barcode can mark out the country of production of goods, manufacturers, product name, production date, book classification number, mail start and end place, category, date and other information, so in the circulation of goods, book management, post and telecommunications management, banking system and many other fields have been widely used. Bar code is by the width of different, different reflectivity of the bar and empty, according to certain coding rules (code system) compiled to express a set of numerical or alphabetic symbols information graphic identifiers. That is, the bar code is a set of different thickness, according to certain rules of the arrangement of the spacing of the parallel lines of graphics. Common bar code is by the reflectivity difference between the black bar (referred to as bar) and white bar (referred to as empty) composition.
Second, the composition of the barcode recognition system
In order to read out the information represented by the barcode, the need for a set of barcode recognition system, which consists of a barcode scanner, amplification and shaping circuits, decoding interface circuits and computer systems and other components.
Third, the bar code scanner to identify the principle of the bar code
Due to the different colors of the object, the wavelength of its reflected visible light is different, the white object can reflect a variety of wavelengths of visible light, the black object absorbs a variety of wavelengths of visible light, so when the light source of the bar code scanner light emitted by the diaphragm and convex lens 1, irradiated to the black and white bar code, the reflected light by the convex lens 2 focusing, the reflected light is irradiated by the bar code scanner. Convex lens 2 after focusing, irradiated to the bar code scanner photoelectric converter, so the photoelectric converter to receive the white bar and black bar corresponding to the strength of the reflected light signals, and converted into the corresponding electrical signals output to the bar code scanner's amplification and shaping circuit. White bars, black bars of different widths, the corresponding electrical signal duration is different. However, the output from the photoelectric converter and the bar code of the bar and empty the corresponding electrical signal is generally only 10mV or so, can not be used directly, and therefore the first photoelectric converter output signal sent to the amplifier to amplify. Amplified signal is still an analog signal, in order to avoid defects and stains caused by the bar code in the wrong signal, in the amplifier circuit needs to be added after a shaping circuit, the analog signal into a digital signal, so that the computer system can be accurately read. Shaping circuit of the pulse digital signal by the decoder into digital, character information. It is through the identification of the beginning and end of the character to identify the bar code symbols of the code system and scanning direction; through the measurement of the number of pulses of digital electrical signals 0, 1 to identify the number of bars and empty. By measuring the duration of 0, 1 signal to determine the width of the bar and empty. This will be read by the defense of the bar code symbol of the bar and the number of empty and the corresponding width and the code system used, according to the code system corresponding to the coding rules, the bar code scanner can be bar code symbols into the corresponding numbers, characters, information, through the interface circuit to the computer system for data processing and management, it will be completed in the whole process of the bar code reading.
More details enpot/zhishi
The application of barcode has the following advantages:
1. Reliable and accurate. Information can be found in the keyboard input an average of 300 characters per error, while the bar code input an average of 15,000 characters per error. If you add the checksum for the bit error rate is one in ten million.
2. Data entry speed. Keyboard input, a typist playing 90 words per minute 1.6 seconds to enter 12 characters or strings, and the use of barcodes, do the same work only 0.3 seconds, the speed increased by 5 times.
3. Economical and cheap. Compared with other automated identification technology, the promotion of the application of bar code technology, the cost is longer low.
4. Flexible and practical. Barcode symbols as a means of identification can be used alone, but also with the relevant equipment to form a recognition system to achieve automated identification, but also with other control equipment linked to the realization of the automated management of the entire system. At the same time, in the absence of automatic identification equipment, can also realize the manual keyboard input.
5. Large degree of freedom. Recognition device and barcode label relative position of the degree of freedom is much larger than OCR. Barcode is usually only in one-dimensional direction to express information, and the same barcode on the information expressed on the exact same ...... >>
Question 10: What is the scope of use of barcode need to start from the principle of barcode encoding,
barcode is a string of characters (numbers + letters, such as B2009A) through the encoding + conversion,
into a bar + empty between the image;
the bar code printer to print out the barcode label is to realize the string conversion image (B2009A) through the encoding + conversion,
into a bar + empty image;
bar code printer to print out the barcode label is the realization of the bar code printer to convert the image (the image) to the image (the image). is to realize the process of converting the image of the string (the bar code in the label);
The image and the string of the code corresponds to the optical device can be recognized through the decoding out,
These optical devices are your common scanner or collector core components.
For example, the scanner gun recognizes the bar + empty image through its internal optics, and then decodes the string,
and then outputs it to a computer port (USB or serial), the application can go to the port to read the barcode corresponding to the string,
and then do the logic of the application (for example, querying the price of the style of clothing corresponding to the barcode, the manufacturer, etc.).
Then do the application logic (e.g. look up the price of the clothing style, the manufacturer, etc.).
Barcodes can represent characters, numbers, symbols, and other information; there are about two dozen common types: EAN-13, Code39, UPC-A, and so on.
Barcode labels on the barcode is printed by the barcode label printer, each barcode and a set of barcode number corresponds to,
different code system and the number of print out different barcode graphics.
The barcode recognition machine (such as barcode scanner, collector, etc.) is to identify the barcode graphics for decoding;
The barcode graphics below the number is in order to see the value of the barcode on behalf of the print up, mainly for the human eye to read;
The barcode graphic below the number of recognition machine is no matter.
In short, the general process is:
Barcode number - > printer print - > barcode graphic labels - > affixed to the item - > scanner item barcode graphic - > scanner to recognize and decode - > to get the barcode number - > the system to use the processing of the ...
Commodity code is the external public bar code, you can apply to the National Article Numbering Center to apply for a general commodity bar code, using EAN-13, how to code there are fixed rules;
If it is for internal use, you can also use the internal bar code, that is, according to the use of your code can be used, if you want to be unique, it can be used with the product number + date of production + running number, if it is the management of the lot, it can be used with the product number + production lot, it can be used with the product number + production lot. Can be used product number + production batch ... Then use the barcode printing software + barcode printer to make it!
The method and application of barcode coding:
1 Do not think of barcode as too profound and omnipotent, barcode is a set of strings,
whether it has a meaning in itself, what it means, what it stands for, it is designed by the applicant,
and the ID number is similar. It is similar to an ID number, except that the barcode is graphical and can be scanned to eliminate manual entry.
2 Barcode can be divided into commodity code and internal code,
Commodity code: EAN13 code, is managed by the national coding center,
used to indicate a specific manufacturer and model of the product,
generally consists of the manufacturer, the product code, the price of the information,
Commodity code is managed by the coding center, you can be scanned and identified in the major shopping malls and stores.
The product code is managed by the coding center and can be scanned in major shopping malls.
Inside the code: that is, according to their own needs within the free design of the bar code,
no uniform rules, can be used in the employee ID, equipment ID, product ID, product packaging ID, raw material batch number and so on;
Anyway, how to make up how to make up.
You may ask, how to recognize the information in it?
The barcode can contain the necessary information in itself, like a commodity code,
or it can just be a unique number (such as the date + flow number),
and then in the backend database when the barcode is issued to store the full information corresponding to this ID,
so that when the system is scanning the barcode can go to the database to find out the corresponding information, making it make sense. information, making it meaningful!
3 single product code, batch code, class code
a, the bar code can be unique, such as each product to give a unique bar code, then it is a single product code, the number is 1;
b, the bar code can also represent a batch of items, such as a certain batch of raw materials, then it is the batch code, the number can be greater than 1;
c, bar code can represent a class of items, such as for a certain batch of material, then it is the batch code, the number can be greater than 1;
c, the bar code is also can represent a class of goods, such as different brands, models, specifications for the issuance of products corresponding to the bar code,
Quantity needs to scan the bar code and enter;
Barcode is a number, the significance of how you design and use, do not know, whether to understand!
Manufacture of bar codes:
1 can be ordered from the bar code label manufacturer, tell your style requirements and quantity, can be; (contact LENX)
2 buy their own bar ...... >>