The Sotfware System Design Of Machine Vision Online Detection System For Hot Steel

Machine vision technology is a kind of nondestructive testing technology, it has been widely applied in industry, agriculture, military, aerospace and other fields, especially in those who are not suitable for manual operation of high temperature, high pressure, toxic and other harsh environments, machine vision measurement technology is used commonly to replace the manual measurement. Efficient and accurate detection can improve the yield of steel products, and then improve productivity and reduce the production cost, eventually enhance the competitiveness. In the process of billet rolling, effective control of the quality is the most crucial step. Under this background, we joint Guigang put forward the “Hot Billet Machine Vision On-line Detection System” to Guiyang Science and Technology Bureau. This project got their funding support.This thesis proposes the three-sensor calibration technique, it solves the problem that the field of two-sensor is insufficient; compared with other similar systems, the system designed in this thesis overcomes the drawback of having one function, it can not only measure the outline of the hot billet, but also can detect the surface crack. On the basis of the theory and algorithm analysis, we complete the design and realization of the software system.The main works are as follows:1. Study the theories that used in this system, introduce the software development environment and the detection system.2. Make demanding analysis of software system. In combination with hardware, we analyze the overall goal of the system and requirements of users and performance, the emphasis on analysis of the system’s functional requirements makes preparations for the design of system.3. Make design of software system. Combine with actual conditions, we put forward the basic design principle, system framework design and the integral design of the system. Based on the analysis of function requirement, we make the design of function module in details, in addition, the design for the use of the database is prepared for the realization of the system.4. Realize the software system. We use MFC technology in the environment of Visual C ++ 6.0 and make functional allocation for each class. On the basis of algorithm analysis, we realize various modules function and interface development through the messaging between class and class.5. Test software system. Through running software system both in the laboratory environment and production field, we verified the stability and reliability of the system.The algorithms used in this system are accurate and stable, they have been verified in billet production line of Guigang; the interface designd is simple and human, it is easy for stuff to operate. The design of the software system is able to meet requirements both in function and operation. Although the system has passed the acceptance of the relevant departments, it still needs to be optimized to raise the practicality.