The Design Of The Sleeper Prestressed Tension System Based On ARM

With the rapid development of China’s economy, China is sparing no efforts to develop railway construction, therefore plenty of concrete sleepers are needed in the process of the railway construction. Furthermore, as for the manufacturing process of sleepers, there is a crucial link of how to implement stretching of prestressed steels. Considering that some disadvantages of stretching instruments used in today’s industry, this thesis comments on ARM11 as microprocessor, with which we can enhance the accuracy, stability, and antijamming capability of the system. Operators on the spot control the whole process of stretching by touch screen; moreover, stretching values can be shown on the touch screen. In this case, traditional keyboards and operating buttons of stretching instruments will not be used any more for they usually malfunction, and are damaged in the production field where there are much dust, leading to financial losses. However, by using the technology of touch screen, companies could reduce their losses in this respect, thus reach higher production efficiency. Production data from traditional prestressed tension system for sleepers can only be printed out via printer or be read on an on-the-spot PC, which means remote inquiry of data is beyond realization. Based on techniques like wireless communication technology, web server, this thesis will help managers to inquire and monitor data in the production process in a real-time and convienient way. In addition, they can schedule more convieniently the sleeper stretching instrument in the production field. And the main work for design and research process mainly is as follows:(1) looking up in materials to learn about the research status home and abroad on sleeper prestressed stretching instrument;(2) Overall design of system, and analyzing the components and design methods of hardware and software platform of the system.(3) Hardware design of system. This thesis uses ARM11(S3C6410) as the main controller, and the tension sensor and the displacement sensor will produce an analog signal, which will go through a filter circuit then an A/D switching circuit to the input port of ARM controller. After that, it will go through a D/A switching circuit at the ARM output port, then an amplification circuit so as to drive the magnetic valve. The control port of ARM connects touch modules, printer, JTAG interface circuit, network interface, RS232 serial interface, USB interface. The last one is power module, which can realize switching among various electrical levels.(4) Developing underlying software for stretching system of sleeper instrument, and transplanting Linux system for S3C6410;(5) Software design of system, and developing drive program and application program for stretching system.(6) In the end, corelating softwares and hardwares of system to debug the system.