激光测距技术在交通安全辅助驾驶中的应用

Application of laser ranging technology in traffic safety assistant driving

针对当前车辆行驶中测距精度不高的问题,提出一种基于激光探测回波延迟空间波束形成的车辆测距技术。采用激光探测技术构建激光回波信号模型,对回波信号模型进行抗干扰滤波处理,对提纯信号采用相关检测器进行激光探测脉冲信号检测,对激光探测回波脉冲信号通过延迟空间波束形成方法进行距离估计,实现准确估计车辆与障碍物的距离参量。实验结果表明,采用该技术进行激光测距,对车辆与障碍物之间距离参量的估计精度较高,抗干扰能力较强,实时性较好,在交通安全辅助驾驶中具有较高的应用价值。

In view of the current problems ranging accuracy is not high in the vehicle, put forward a kind of beamforming based on laser detection echo delay space vehicles ranging technology. Laser echo signal model is established using laser detection technology to anti-jamming filter processing, the echo signal model for purification of signal using correlation detector to laser detection pulse signal detection, the detection of laser echo pulse signal by delay beam- forming method is used to estimate the distance space, and realizes the accurate estimate vehicle and obstacle distance parameter. Experimental results show that adopting the technology of laser ranging, the estimate of the distance between vehicles and obstacles parameter precision, strong anti-jamming ability, good real-time performance, in the traffic safety auxiliary driving has higher application value.