2、进行了讨论以及对嵌入式系统ARM和开发环境做了简单介绍。并且在介绍超声测距系统功能的基础上，提出了系统的总体设计，包括嵌入式系统测距功能、系统设置功能、显示功能和串口通信的方案设计以及监控界面远程监控、远程修改和数据存取等功能的设计。最后对整个系统进行验证。实验表明，监控软件和嵌入式系统的各项功能均达到设计要求。最后文中分析了系统设计的不足及如何对系统进行完善提出了一些改进建议。关键词:超声传感器，超声测距系统，嵌入式系统ARM，PC机串口通信AbstractThis essay presents an
3、 ultrasonic ranging system based on the ARM processor LPC2368. This system uses ultrasonic echo and reflection of the time difference to measure the distance with the definite condition of the propagation velocity of ultrasonic spreading in the air. It i
4、ncludes two parts: one is PC monitoring software; the other is a machine embedded under measuring system.The design principle of the ultrasonic ranging system sets an aim of optimizing the performance of this system. In order to be suited to the differen
5、t moving objects with different rates, the embedded system sets two display module of normal ranging and tachometric ranging, that is adopting the mode of tachometric raging in terms of objects whose rate changing faster; while adopting the mode of norma
6、l raging in terms of objects whose rate changing slower.This essay summarizes some features of ultrasonic, introduces the basic principle of ultrasonic ranging, analyses some main parameters affecting the ranging system, and gives a brief introduction of
7、 the embedded system ARM and the development environment. On the base of the introduction of the function of the ultrasonic ranging system, it also puts forward the design of the whole system. That includes the ranging function of the embedded system, th
8、e setup function, the display function, the serial interface communication design and the design of remote monitor interface, remote registry and data access. At last, it gives the verification of the whole system. As the
