Application And Study In The Highway WIM System Based On ARM Technology

The Highway WIM System plays an important role of protecting freeway normally. Base on the research actuality and problems on the Highway WIM System of our country i this article put forward some new mentality and solution to improve the performance index of the whole WIM system.Firstly, studying the movement condition and dynamical features that cars behave in the process of WIM, and knowing that the vibrations are the main factors impacting the measure precision. So it is concluded that to reduce and avoid the stochastic vibrations is necessary and useful. Then, taking this result as the pre-experiment knowledge to eliminate these bad influence in the behind process of weighing data treating. Moreover, these factors should be also fully considered in the software and hardware design, and these bad influence should be fall to the lowest level.For the Highway WIM system, the weighing accuracy and the speed of the vehicle moving are the most important standard specification. It indicates the technical level of the WIM systems. While the weighing signal processing of the actual WIM is simple digital filter and no further signal processing technique. According to analog signal characteristic output by the weighing sensor, some basic research work on the Highway WIM system is finished and some creative solution is presented in this dissertation. As a result, the weighing accuracy was improved.To enhance the performance index of the WIM system, another aspect is uses the appropriate software and hardware technology. With the development of computer technology, embedded system, being the center of interest in the rising research in recent years, has been becoming an important component in this field. As a high-performance, cost-effective RISC processor, the 16/32-bit RISC ARM920T developed by Advanced RISC Machines, Ltd has been included in Samsung's S3C2410 combined with many important peripheral functions, and therefore is an ideal solution for Ethernet-based embedded Highway WIM system. In this dissertation, an ARM-Linux based embedded Highway WIM system product platform is proposed, designed, realized as well as embedding a simplified Linux operating system in it.