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The two-dimensional code technology in China automotive manufacturing industry application
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With China's rapid economic development, people's consumption level rising, car market is more and more big, the car yield rises substantially, vehicle safety problem also more and more attention. On one hand, how the host assembly site, a complete record of all kinds of parts, parts of the production batch number, production date, a large amount of information, for the protection of automotive safety critical; at the same time, along with the China auto recall law come on stage, when the automobile enterprises found products in some defects and needs to recall, the need for accurate definition of automobile products the recall. Under this background, as a kind of information storage transmission and automatic identification technology, two-dimension code technology can solve the production assembly and recall process all sorts of parts back problems, help numerous car manufacturers successfully realize the parts back, thus become the numerous car manufacturers of security tool.Compared with other automatic identification technology, two-dimensional code has the advantages of large information capacity, low cost, wide range of coding, error correction capability and other unique advantages, especially in the last two years, the two-dimensional code has been used by many domestic industry, while in industrial production, such as financial, medical, commercial, transportation, logistics and other areas of application more extensive and mature. Due to the development of the times, the two-dimensional code technology application domain also expands ceaselessly, how to accurately and quickly in more material on it literacy, it is placed in the numerous experts and the industry face a difficult problem, and machine vision is like a light, for the two-dimensional code technology brings new hope, new direction of guiding.Machine vision assisted two-dimensional code technology developmentThe two-dimensional code technology in bar code technology developed on the basis of, in our research is still in its initial stage. Compared with one-dimensional codes, in the same area on the two-dimensional code contains information than one-dimensional code more than several times, but has a more reliable, anti damage ( damage 25% still legible ) characteristics, at the same time with the bar code label printer paper 100% of the contrast, reading effect is very good, and can reach a seconds to read a 50 two-dimensional code speed. It is due to the unique advantages of the two-dimensional code above, the two dimensional bar code in this new technology needs grow with each passing day.As we all know, is currently the most commonly used DATAMATRIX code by using matrix method consisting of data, available in a data matrix containing 2300 data information, so ten years ago once published will cause a worldwide sensation, but in ten years it application and promotion is slow, investigate its reason, it is because DATAMATRIX code application needs to span two technical barriers: first, how efficient, accurate print it out; secondly, how efficient, accurate reading it. In order to solve these two problems, as a kind of intelligent image recognition technology, machine vision which shows the importance of the one and only." At present, on white paper with bar code label printers DATAMATRIX two-dimensional code before reading, without there having been any technical problems, at the same time, in the bright metal surface by laser or floating needle can also obtain good quality. However, when the rough or dark metal, using a laser or a floating pin type DATAMATRIX two-dimensional code is extremely difficult to identify the human, must have the aid of intelligent image recognition technology, is also the machine vision technology. Therefore, some famous foreign bar code scanner and optical recognition device are respectively introduced their own machine vision products, such as Motorola-Symbol company, Microscan company, Cognex company and Datalogic company. " Talking about the two-dimensional code technology development trend, the United States and Europe and other countries are now in the ATAMATRIX two-dimensional bar code technology developed on the basis of " direct metal components play lithography (Direct PartsMarking ) ", namely DPM, is now widely used in the automotive, aerospace, electronics, medical and military products and many other industries. Direct metal components play time ( DPM ) is the biggest advantage is from product blank carved, has been tracking product of the whole process, now in the country is to promote the enterprise resource planning system ( ERP ), SAP system is inseparable from the two-dimensional code technology, especially without direct metal components play time ( DPM ).The two-dimensional code technology in the application of automobile industry widely and deeplySpecific to the two dimensional bar code in the application of automobile industry, the DPM two-dimension code technology is now in the United States in the auto industry are widely used, American Automobile Manufacturers Association ( AIAG ) also specially formulate relevant standards, and part of our country joint-stock car manufacturers have also begun to application. Based on the rich professional knowledge and practical experience, the two-dimensional code technology 's application in the automobile industry has a very wide and deep, from the steel body of the engine, crankshaft, connecting rod, a steel cover, cam shaft to the gearbox of the valve body, valve seat, valve cover, and then to the clutches of many key spare parts, and electronic ignition and safety airbag, two-dimensional code of the application of meet the eye everywhere.Because the quality of production and processing to track the entire process, improve the processing quality, at the same time as the track in the process of production and processing equipment, free workers operating state, and the original production line into a flexible production lines, can produce a variety of products. More importantly, the successful introduction of two-dimensional code for anti counterfeit products provide a powerful means for the after sale service, the product provides convincing guarantee, and MES ( Manufacturing Execution System) for the realization of a complete data platform.First of all, can be in metal by laser or pneumatic floating needle hit dependable clear two-dimensional matrix code DATAMATRIX; secondly, can accurately recognize the metal on a two-dimensional matrix code; finally, can read data directly transported to the upper layer management system, and these are also friends of Shanghai pass in the automotive industry two dimensional code implementation of the field made so much critical success factors.Carved and reading is still the bottleneck of two-dimensional code technologyAlthough today the two-dimension code technology has many fundamental breakthrough, but in playing time and reading of existing technical limitation is the two-dimensional code technology development bottleneck lies.According to his introduction, metal black metal and non-ferrous metal two, nonferrous metal and yellow, white, silver and so on, at the same time, the metal surface is divided into machining surface and rough surface, and the surface is divided into different processing levels. In this complex process conditions, on the moment presents a very personalized requirements, engraving machine requires not only the quality and stability, but also need to individually carved parameters adjustment. According to the United States of America barcode management committee ( AIM ) and the American Automobile Association ( AIAG ) regulations, direct metal parts carved two-dimensional code must assess engraving quality level, respectively A, B, C, D, E, F or 1, 2, 3, 4, 5, 6, and only A, B, C level quality to flow to the next step of the process, in some of the strict quality requirements and only A, B can release." It is the seemingly de
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