嵌入式换道预警系统设计  

Embedded Design of Lane Change Warning System

作　　者：郭艳君[1,2] 徐远新[2] 孙勤英[2] 郭明华[2] 

机构地区：[1]辽宁省交通高等专科学校物流管理系,沈阳110122 [2]长安大学汽车学院,西安710064

出　　处：《科学技术与工程》2015年第18期199-205,共7页Science Technology and Engineering

基　　金：国家自然科学基金项目(61374196);教育部长江学者与创新团队支持计划项目(IRT1286);交通运输部应用基础研究项目(2013319812150)资助

摘　　要：针对以往换道预警系统设计中存在的灵活性低、实时性差等缺点,设计了一种基于车载CAN(controller area network)总线数据的嵌入式换道预警系统。首先,以飞思卡尔半导体公司的MC9S12XET256微处理器为核心,利用雷达传感器、车载CAN总线等获取与换道相关的车辆行驶状态参数和周围环境感知信息等原始数据,并以TTC(time to collision)为门限值制定换道预警规则,通过声光报警方式实现报警。在实车条件下进行验证,其中安全换道过程系统预警准确率为95%,冲突区预警准确率为93%。Aiming at the disadvantages of the previous lane change warning system in low flexibility and poor real-time performance, designed a lane change warning system based on the embedded vehicle CAN bus data. First of all, to Freescale Semiconductor Inc MC9S12XET256 microprocessor as the core, Acquisition and lane change related vehicle state parameters and the surrounding environment perception information of original data by radar sensor, vehicle CAN bus. Using Time-To-Collision of lane changing warning threshold value, the way to achieve the alarm through sound and light. Through the real vehicle validation, the system can accurately, fast implementation of lane changing warning function. Under the condition of the real vehicle, the warning accuracy in safety zone was 95%, the warning accuracy in conflict zone is 93%.

关 键 词：嵌入式 TTC CAN总线 换道预警 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]