基于车载激光雷达设备的跟驰数据采集方法

Data acquisition method of car-following model for urban expressway

为了验证车载激光雷达设备能否用于跟驰数据的采集,通过在乌鲁木齐市快速路的实地实验,进行了基于车载激光雷达设备的实时动态跟驰数据采集过程。选取安全距离模型作为评价模型,分析了不同状态下后车驾驶员的反应时间,并采用非线性回归分析方法对模型进行了参数标定。通过对比车头间距的实测值与模型计算值的轨迹曲线对模型进行了检验,结果表明,实测值与检验值基本吻合,模型可以描述不同状态下驾驶员的跟驰特性。因此,利用车载激光雷达设备对跟驰行为的数据进行采集是可行的。

In order to determine whether the laser radar equipment can be used for data acquisition,the Urumqi expressway was used as the field example to complete a real-time dynamic following data acquisition process.Safety distance model was selected as the evaluation model.The reaction time of after-driver's under different conditions was analyzed and the nonlinear regression analysis of reaction time was used to perform the model parameter calibration.The effect of the model was verified by comparing the geometric locus of space headway's measured value with the calculated value.The results showed that the measured values were in good agreement with the test values and the model can describe the characteristics of the drivers in different states.In conclusion,using on-board laser radar equipment data acquisition of car-following action was feasible.