Application of automatic identification technology

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Application of automatic identification technology of commodity bar code

automatic identification technology is an important method and means for automatic reading and automatic input of information data into the computer. It is a comprehensive science and technology based on the development of computer technology and communication technology. Automatic recognition technology has developed rapidly in the world in recent decades, and has initially formed a high-tech discipline integrating computer, optical, electromechanical and communication technologies, including bar code technology, magnetic stripe (card) technology, optical character recognition, system integration, radio frequency technology, sound recognition and visual recognition

today's information society can't live without computers. The prototype made by the development team is only the result of four and a half months of research and development. It is the rise of automatic identification technology, which provides an effective means for rapid and accurate data acquisition and input, and solves the "bottleneck" problem caused by the slow speed of computer data input and high error rate. Therefore, automatic identification technology, as a revolutionary high-tech, It is quickly accepted by people

first, bar code technology

speaking of automatic recognition technology, it is inevitable to mention bar code, because it plays an important role in today's automatic recognition technology. The formation process of automatic identification technology is inseparable from the invention, use and development of bar code

bar code is composed of a group of regularly arranged bars and blanks and corresponding numbers. This data code composed of bars and blanks can be read by machines, and it is easy to translate into binary numbers and decimal numbers. These bars and spaces can be combined in different ways to form different graphic symbols, that is, various symbol systems, also known as code systems, which are suitable for different applications

at present, the most frequently used code systems are ean, UPC, 39 code, interleaved 25 code and EAN128 code. UPC bar code is mainly used in North America, and ean bar code is an international general symbol system. They are fixed length and meaningless bar codes, which are mainly used for commodity identification. EAN128 bar code is a specific bar code symbol jointly developed and adopted by ean lnternational and UCC. It is a continuous, non fixed length and meaningful high-density code, which is used to indicate the production date, batch number, quantity, specification, shelf life, place of receipt and other more commodity information. Other coding systems are mainly applied to meet special needs, such as kudeba code for tracking and management of blood banks, libraries, parcels, etc., 25 code for packaging, transportation and international aviation system for sequential numbering of tickets, and 93 code similar to 39 code, which has a higher density and can replace 39 code

these bar codes above are all one-dimensional bar codes. Due to the continuous expansion of the application field of bar code, higher requirements are put forward for the information density and amount of bar code in a certain area. In order to better meet this demand, a new form of bar code - two-dimensional bar code came into being. In terms of structure, two-dimensional bar codes are divided into two categories, one of which is composed of matrix codes and point codes, and its data is encoded in the form of two-dimensional space, and the other includes overlapping or multiple lines of bar code symbols, and its data is displayed in strings of data lines. Overlapping symbol marking methods include code 49, code l6k and PDF417

pdf is the abbreviation of portable data fi7e, and 417 is related to multi width code, which is used to encode characters. PDF417 is designed and launched by symbol Technologies Inc. The overlapping code contains row and end of row identifiers and scanning software, which can obtain data from different parts of the label. As long as all rows are scanned, it can be combined into a complete data input. Therefore, the data reliability of this code is very good. For PDF417, when the stained or destroyed part on the label is up to 50%, it can still read all the data content

matrix codes such as MaxiCode, data matrix, code one, vericode and dotcode A. matrix code labels can be made very small, or even made into labels of silicon wafers, so they are suitable for small objects

optical character recognition OCR

optical character recognition OCR has a history of more than 30 years. In recent years, image character recognition (ICR) and intelligent character recognition (ICR) have appeared. In fact, the basic principles of these three automatic recognition technologies are roughly the same

three important application fields of OCR: text input in office automation; Automatic mail processing; Other requirements related to the automatic text acquisition process. These fields include: retail price reading, order data input, document, check and document reading, microcircuit and small product status feature reading, etc. Due to the progress in the recognition of handwriting features, applications in handwriting analysis and signature authentication are being explored

III. magnetic stripe (card) technology

magnetic stripe technology applies the basic principles of physics and magnetomechanics. For automatic recognition manufacturers, magnetic stripe is a thin layer of material (also known as paint) composed of directionally arranged iron oxide particles, which is bonded together with resin and adhered to non-magnetic substrates such as paper or plastic

the advantage of magnetic stripe technology is that the data is readable and writable, that is, it has the ability to transform the data lightweight engine on site. In fact, it is not a new concept; Data storage capacity can meet most needs, easy to use, low cost) and also has a certain degree of data security; It can adhere to many substrates of different specifications and forms. These advantages make it widely used in many fields, such as credit card, bank ATM card, air ticket, bus ticket, automatic sales card, membership card, cash card (such as magnetic card), etc

fourth, the rapid development of voice recognition technology

voice recognition and the development of efficient and reliable application software have made the voice recognition system applied in many aspects. This system can use voice instructions to apply specific short sentences to achieve "no hands" data collection. Its biggest feature is that it does not use hands and eyes, which is important for those workplaces that collect data and complete the use of hands and feet at the same time, And the label is only a means of identification, which is particularly suitable for occasions where data collection is impractical or inappropriate

v. visual recognition

visual recognition system can be regarded as a system that can obtain visual images, and through a process of feature extraction and analysis, it can automatically recognize limited signs, characters, coding structures. Cisco has proposed a new product development direction structure or other features that can be presented in the image as the basis for accurate recognition

with the development of automation, vision technology can be combined with other automatic recognition technologies

(to be continued)

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