The application of bar code technology is a necessary means to realize modern management, and its advantages are well known. No matter how the industrial field develops, bar code is the only way to realize industrial automation. With the development of domestic industrial technology, many factories have realized barcode sales management, inventory management and production process management. \x0d\x0d\ 1 barcode and barcode system barcode technology \ x0d \ uses barcodes to represent data needed by computers, and then converts barcode data into data that computers can automatically read. Bar code technology includes bar code compilation rules, bar code decoding technology, bar code printing technology, data communication technology and computer technology. It is a comprehensive technology. Any kind of bar code is composed of bars and spaces according to the pre-specified bar code rules and related technical standards. So far, there are more than forty bar code systems in the world. General cross code 25 can be used in logistics management, which is characterized by small space occupied by symbols and high information density. According to the data structure represented by bar code symbols and the data types that can be coded, we chose the cross 25 code in the production of air conditioners. The calculation method of bar code parity bit: the sum of one and three cycles in bar code data is weighted, and then the single digit of the sum is subtracted by 10, and the value obtained is the check data of the last bit of bar code. \x0d\\x0d\2 barcode printing \x0d\ We have adopted the M4800 thermal transfer barcode printer of SATO Company in Japan, and the printing speed is 125mm/s, which has the advantages of flexible format, high image quality, low printing cost, convenient and reliable use and low failure rate. Its disadvantage is that the speed of this printer is a bit slow. It finishes bar code printing under the control of microcomputer. We are equipped with Japanese NEC PC 980INS/E20 portable computer (hard disk 20M, memory 40M). Bar code software is generally written in BASIC language, which is relatively simple. Considering the printer's ability to process Chinese characters, it is best to choose a bar code printer that can handle the secondary Chinese character library driven by ordinary microcomputer. In addition to the bar code, the bar code label should also include some necessary information, such as the manufacturer's trademark nameplate. It can also be completed by the manufacturer affixing a self-adhesive bar code paper tape on the printing carrier in advance. \x0d\\x0d\3 Bar code recognition \x0d\ Bar code recognition is completed by a bar code reader, which can be divided into photoelectric scanners and decoders and generally combined together. The MS720 reader of METROLOGIC Company in the United States is an online laser scanning reader with a scanning speed of 2,000 lines per second and a reliable scanning distance of 7 ~ 15 inch. There are 20 laser scanning lines in the scanning area, scanning the bar code in five directions, communicating with the computer through RS-232 interface, and selecting 12 bar code system by using DIP switch. The task of the decoder is to convert the signal generated by the scanner into data that can be recognized by the computer according to a certain bar code decoding principle, and then transmit it to the computer. The decoder function is usually realized by a microprocessor running corresponding software. The new barcode reader must be initialized according to the code system selected by the user: set barcode system → data transmission rate → barcode character length → define check bit → interface type between barcode reader and computer. The decoder can only recognize the barcode system selected by the user after initial programming. Generally, the bar code reader is connected to a microcomputer or computer terminal, as long as its output is connected to the parallel interface or RS-232 serial port on the microcomputer or terminal. \x0d\\x0d\4 barcode verification \x0d\ In order to ensure the printing quality of barcodes, the printed barcodes should be verified regularly. Generally, a light pen barcode scanner can be prepared. For example, TBR- 1 100 or THS-2 1S can meet the requirements. If conditions permit, you can further prepare a high-grade bar code tester, such as CODEBARⅱⅱ II II: the wavelength of light source is 633mm (red light) //900mm (infrared light), the resolution is 25μm, the measurement accuracy is 75 μ m, and the reflectivity measurement range is 0. 5 The composition of the bar code application system (as shown in the figure) 6 Some experiences in the application of bar code technology began with 1994. We took the lead in using bar codes in air conditioning production and achieved one-time success. Over the past few years, I have accumulated some experience in popularization and application, mainly including the following points: \ x0d \ x0d \ ① The importance of popularizing barcode knowledge. In the popularization and use, managers and operators should understand the principle of bar code, why bar code technology should be applied, the role of bar code technology in computer systems, and the application of bar code technology will produce efficiency in production management and quality management, so that everyone can pay attention to this work ideologically. \x0d\② The application of barcode must be closely coordinated by all departments. The application of barcode involves many links, such as product number, barcode printing, barcode pasting, barcode scanning and so on. Only through the division of labor and cooperation of production department, quality inspection department and equipment department can it be completed. Generally speaking, the bar codes of products are printed centrally. The specific printing quantity and paste can be completed by the production workshop, and designated personnel will operate and maintain it, and technical training will be given to it. Bar code scanning should be completed by the quality inspection department. When the bar code information is wrong, it needs to be handled in time, and it needs the coordination and full support of the upper-level leaders. \x0d\③ Effective management of bar code through computer system is the key to the application of bar code technology. The purpose of applying barcode technology to management is not only to ensure the rapid and accurate input of product information, to prevent the loopholes caused by manual input, but also to provide managers with various data of each product. We used bar code technology in the commodity inspection of air conditioners, and established a quality file for each product before leaving the factory, which effectively provided all kinds of information. \x0d\④ Formulate rules and regulations for bar code management, and the application of bar code must follow certain laws and conform to its scientificity. Establish the overall coding system, internal bar code generation rules, bar code printing system, bar code paste specification and product bar code use system of the product, and take the bar code utilization rate of the production workshop as an economic and technical index for assessment.