Study On The Automatic Measurement And Control System For The Sheet Thickness

The sheet thickness control is a key technology in the sheet rolling industry. The study on the measurement and control system for sheet thickness directly related to the product quality and economic efficiency. With the development of computer-controlled technology, the measurement and control technologies for sheet thickness have the trends to measure and control the entire production process of dynamically by on-line technologies. Therefore, our work in this thesis focused on the automatic measurement and control system for the sheet thickness. The computer technology, automatic testing technology and measuring technology were successfully integrated in the metal sheet production process to achieve continuous intelligent monitoring and control of the production.Firstly, some issues of the test bed with the sheet thickness measurement and control system were discussed. Based on research, Scissors measuring method and sensors were selected, and the intelligent collection, transmission, processing of the thickness signals were presented, especially focued on analysis of the functions of the statistical process control in the data processing. Secondlly, the system design and the mathematical model were analyzed on the basis of the project and the sheet thickness control theory—spring equation. Finally, the functions of the developed intelligent testing software, the used techniques and the system performances were introduced in detail.Scissors measuring method was selected as the differential measurement in the system, using a dual-lever structure at the same time to feel the thickness changes of the lower and upper surface and eliminating the impact of vibration, high precision date were received. By the supporting of VB6.0, the functions of real-time collection, online analysis, saving, display and the test process of automatic feedback control of the multi-channel signals of thickness were performed.The effective control of the sheet thickness precise and increasing the product quality can provide a good basis for manufacturing better products.what's more it is a good advice for the same resreach.