Application Study Of Data Collection System In Industry Measuring And Control Based On OPC And LabVIEW

Virtual instrument is developed with the development of PC technology, and is the integration of computer technology and instrument measuring technologies. Compared with traditional instrument, virtual instrument has obvious technological advantages in intelligent degree, processing ability, performance price ratio, maneuverability, and other aspect.With the integration of various kinds of new technologies, monitoring and control configuration software is gradually improved, and different kinds of functions of it can be realized according to requirements of customers. The development and upgrade of this software is accelerated, which makes it more competitive and with more wide market foreground.In domestic industrial control field, iFix, WinCC, Kingview, Inspec, Kunlun Gongkong, and other monitoring and control configuration software are popular. However, these software are either very expensive or with limited functions. Especially in small-scale system, with low investment, the requirement for compatible with previous equipments and instruments and the requirement for realizing certain monitoring and control functions, other software (such as LabVIEW) are searched for replacing the above ones to realize its monitoring and control functions. LabVIEW is developed by America and is one of the widely used virtual instrument developing environment in the world. It has been used in fault diagnosis, process control, detection, and other fields.The application of LabVIEW in medium- and small-scale control systems is analyzed in this dissertation. The feasibility of upper supervision function by combining with advanced OPC interface technology and serial port communication technology are analyzed. In practical application, the solution scheme of "LabVIEW+DSC+OPC" is proposed. By using LabVIEW, the programming of upper interface, management of measuring system information, data collection of serial port communication, storage and search of measuring and control data, and other functions are realized. This monitoring and control software can be compatible with the original instrument and equipment. With self-made data collection equipment, the cost of establishing the measuring system is reduced.