嵌入式汽车防撞系统的研究

Research on embedded automobile collision avoidance system

以ARM嵌入式Linux操作系统为开发平台,结合AVR单片机,在优化测距算法的同时采用测距范围可达50 m的大量程空气超声换能器,设计了一款精度高、量程远、价格低、各种车型都适用的汽车防撞报警系统.该系统采用飞凌OK6410为主控开发板,AVR单片机负责采集行驶车辆间的距离数据并通过RS232与ARM开发板通信,将车辆间距和速度信息传送给ARM开发板,系统利用建立的防撞模型得到报警信息.实验表明:该系统在一定范围内可以准确地发出报警信息,具有创新性和实用性.

Taking ARM embedded Linux operating system as the development platform, combined with AVR microcontroller, while optimizing the ranging algorithm and using air ultrasonic transducer, the measurement range of which can be up to 50 meter, this paper designs a high-precision,range far, low price, various models suitable automobile collision avoidance warning system. The system adopts Forlinx OK6410 development board for the master. AVR microcontroller is responsible for taking the data of traveling distance between vehicles,and with the ARM development board via RS232 communication transfers vehicle＇s distance and speed information to the ARM development boards. The system uses the established collision avoidance model to get alarm information. Experiments show that the system can accurately send out alarm information within a certain range. It is innovative and practical.