汽车速度测量系统的智能化设计

本文介绍了汽车行驶过程中速度参数的测量原理，建立了相关数学模型。并设计了
采用以嵌入式微处理器MC9S12DP256B 为核心的智能数字式汽车组合仪表解决方案，具有实时性好、反应灵敏、精度高等优点。系统可对汽车的车速参数进行实时测量和显示，并具有安全报警功能。系统还预留了SCI 和CAN 总线接口，便于与汽车其他电子控制系统联接通信功能的扩展。
关键词：速度测量 周期测量安全报警
Abstract: The principle of how to measure the main automobile running parameters is discussed in this paper and the correlative math model is given. And design a high reliability aptitude instrument solution project of which the core is that the embed microprocessors based on MC9S12DP256B are used is invented. This project has some advantages, such as good real time, high design degree, and high sensitivity to response. Using this instrument, the real time measure and display the parameter of vehicle speed can easily be made. The bus interface of I2C and CAN is obligated in this instrument system. The aim of doing this is to make this system can easily expand system function and can connect and communicate with other automobile electrical control system.
Key words: speed measurement；cycle measurement；Safety alarm