多路况下汽车防碰撞及行人保护预警系统设计

Design of Vehicle Anti-collision and Pedestrian Protection Warning System Under Multiple Road Conditions

研究设计一种多路况下的汽车防碰撞及行人保护的综合预警系统。采用毫米波雷达防碰撞系统和超声波雷达侧面盲区行人保护系统的结合,实现汽车纵向和横向主动安全保护;通过引入附着系数这一参数,建立不同路况条件下汽车安全距离计算模型;运用多传感器技术,实时监控驾驶员驾驶状态,减少系统的虚警率和误警率;设计一种集显示,声音、灯光报警,模式选择为一体的控制面板。试验结果表明,系统能够根据不同行驶路况建立汽车安全距离模型,对侧面不同速度行驶的汽车、行人准确识别并做出相应反应,报警显示控制面板操作简便,界面友好,安全距离模型试验结果与MATLAB仿真结果相对误差在7%以内。系统具有较高的环境适应性,能够提高汽车行车的安全性。

This study designs a comprehensive warning system of vehicle anti-collision and pedestrian protection. This warning system combines millimeter wave radar anti-collision system with ultrasonic radar side blind pedestrian protection system, which realizes the combination of vehicle longitudinal and lateral automatic protection. Besides, through the introduction of adhesion coefficient parameter, the calculation model of vehicle safety distance under multiple road conditions is established. What’s more, by using multi-sensor technology, it realizes the real-time monitoring of the driver state;consequently, the system false alarm rate can be reduced. This comprehensive warning system designs a kind of control panel which assembles display, sound, light alarm and mode selection. The test results show that according to multiple road conditions this system can establish vehicle safety distance model and make identification and immediate response to the vehicle and pedestrian that are at different speed from sides; in addition, alarm display control panel has simple operation and friendly interface. And the relative error between the results of safety distance model and the results of MATLAB simulation is within 7%. This system owns higher environmental adaptability, which greatly improves the automatic safety of vehicle driving.