基于DSP的嵌入式辅助驾驶系统的研制

Design of A Embedded Driving Assist System Based on DSP

为提高汽车的安全性,设计了一种基于数字信号处理技术(DSP)的嵌入式辅助驾驶系统。该系统通过实时收集的汽车行驶信息来建立汽车的运动模型,并藉此来实时监控汽车的运动状态;系统在必要情况下系统能给司机警示,在紧急情况下系统还能自动驾驶汽车以避开危险。系统硬件采用DSP与ARM两个芯片协同工作的模式,其中DSP芯片为协处理器,负责处理行驶车辆及其附近目标的运动信息,ARM芯片为主芯片,负责建立本车的运动模型并进行辅助驾驶。还以自动刹车过程为例,着重介绍了软件系统的运行原理和主要算法、模型等。

To improve the safety of the cars,a kind of embedded assist driving system was designed which based on DSP. By collecting the informations and then building movement model of the running car and the target nearby,the system can real- time monitor it＇s states, alert the driver if necessary, and even replace the driver to drive the car istself for the safety of the car under emergency situations. The system has two chips,as coprocessor,the task of DSP is processing the informations ; as main processor, the task of ARM is model building and assist driving. This paper also took the process of automatic brake as example, emphatically introduced the operation principle, primary algorithm and the model of the software system.