多点激光布设参数对车辙深度计算误差的影响

发布时间：2018-05-09 18:53

本文选题：道路工程 + 车辙深度　；参考：《华南理工大学学报(自然科学版)》2017年04期

【摘要】：为评价多点激光车辙深度的计算误差,研发了室内车辙形态模拟设备,利用三维激光获取模拟车辙横断面点云数据,通过Matlab编程,借助5阶巴特沃兹低通滤波器对数据进行平滑处理,分别模拟了均布9点、13点、21点和非均布13点激光获取的车辙横断面曲线,采用包络线法计算三维激光和多点激光车辙最大深度,以绝对误差和相对误差为评价指标,分析轻、重两个等级的U、W型车辙深度计算误差受激光点数量与布设方式影响的规律.模拟结果表明:随着激光点数量增加,两种形态车辙横断面的深度计算误差逐渐减小,均布9点、13点、21点和非均布13点激光的最大相对误差分别为22.9%、12.8%、8.3%和16.4%;随车辙严重等级的增大,绝对误差逐渐增大而相对误差逐渐减小;非均布13点激光对U型、W型车辙的深度计算相对误差比均布13点激光时的最多分别增大4.8%和2.2%;多点激光车辙深度计算的绝对误差会造成车辙严重等级低估,可能导致路况评价与养护决策的误判.
[Abstract]:In order to evaluate the calculation error of multi-point laser rutting depth, an indoor rut shape simulation equipment was developed. The 3D laser was used to obtain the simulated rut cross section point cloud data, and the data was programmed by Matlab. By smoothing the data with the help of 5 order Butterworth low pass filter, the track cross section curves obtained by 9 points, 13 points, 21 points and non uniform 13:00 laser are simulated, respectively. The maximum depth of 3D and multipoint laser ruts is calculated by envelope method. Taking absolute error and relative error as evaluation index, the law that the calculation error of UHW rut depth of light and heavy grades is affected by the number of laser points and the way of setting is analyzed. The simulation results show that with the increase of the number of laser points, the depth calculation error of two kinds of rutting cross section decreases gradually. The maximum relative errors of 9 points, 13 points, 21 points and 22. 9% and 16. 4%, respectively, are 22. 9% and 12. 8% and 16. 4%, respectively, and the absolute error increases gradually and the relative error decreases with the increase of rutting severity grade. The relative error of calculating the depth of U type and W type ruts by non-uniform 13:00 laser is 4.8% and 2.2% higher than that of 13:00 laser, respectively, and the absolute error of calculating the depth of multi-point laser rutting will result in serious underestimation of rut grade. It may lead to misjudgment of road condition evaluation and maintenance decision.
【作者单位】：长安大学公路学院;中交第一公路勘察设计研究院有限公司;
【基金】：国家自然科学基金资助项目(51508034) 陕西省交通运输科技项目(12-15K) 内蒙古自治区交通运输科技项目(NJ-2015-31) 长安大学中央高校基本科研业务费专项资金资助项目(310821153104&310821151006)~~
【分类号】：U418.68

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