| With the development of information technology and the tendency of economy globalization, market competition that encountered the modern manufacturing enterprises is becoming sharper and sharper. So it is necessary for enterprise to carry out enterprise information strategy. Manufacturing execution system technology has become a key element for solution to enterprise information construction. But the development and application of MES in discrete manufacturing enterprise is hindered in some degree by the defects of data-acquisition system in the production site.In this paper, the overall structure designing proposal of data-acquisition system in the production site is put forward basing on the requirements analysis of production management in the enterprise's workshop. Then the common chip AT89S52 is selected as the main processor after considering the functions and cost. On the basis of a good selection of various functional chips, the circuit schematic drawing and PCB board layout are drew.For the data-acquisition system, communication is a very important aspect. In this paper four communication methods are promoted, they are Serial RS-232 communication, Ethernet , Serial to Ethernet and wireless communication, which can basically meet Workshop's communication requirements.According to the requirements of the system, the MCU software, the menu structure on the LCD of the data-acquisition terminal equipment, and the host computer interface are designed, then the management software of the data-acquisition system is developed, which can achieve the function of checking the Staff attendance, enquiring the task, reporting the quality information, handling the emergency, and transmission of the NC code and so on.A product design not only need to realize its function, but also have to meet the requirements of its using convenient, aesthetic and so on. In the last based on Man-machine Engineering, the contour of the data-acquisition terminal equipment is designed . |
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