三维激光扫描路面点云多频率振动信息去除方法  

Method for Removing Multi-Frequency Vibration Information From 3D Laser-Scanned Pavement Point Clouds

作　　者：赵栓峰[1] 魏震宇 郭帅 魏政 Zhao Shuanfeng;Wei Zhenyu;Guo Shuai;Wei Zheng(College of Mechanical Engineering,Xi’an University of Science and Technology,Xi’an 710054,Shaanxi,China)

机构地区：[1]西安科技大学机械工程学院,陕西西安710054

出　　处：《激光与光电子学进展》2023年第20期243-254,共12页Laser & Optoelectronics Progress

基　　金：陕西省重点研发计划(2020ZDLGY04-06);陕西省重点研发计划(2020ZDLGY04-05);陕西省创新团队计划(2021TD-27)。

摘　　要：由于大范围三维激光扫描易受到采集车的多频率振动噪声的干扰,获取的路面三维形貌精度低。传统滤波和图像处理技术存在无法进行分量分析和过程复杂等缺陷。针对此问题,提出一种基于改进的哈里斯鹰优化(AMHHO)算法的变分模态分解(VMD)算法来对路面分量进行分析,精确剥离多频率振动信息。对车载3D激光相机获取的路面点云数据进行降维得到路面纵剖面信号,用所提AMHHO-VMD算法进行分解,对分解得到的本征模态函数(IMF)进行傅里叶变换并结合采集单元振动状态判定多频率振动信息。最后将筛选后的有效分量重构,得到精确的路面三维形貌。实验结果表明:与经验模式分解(EMD)算法和小波包分解算法相比,所提AMHHO-VMD算法能将多频率振动分量从原始路面点云中剥离,获得精确的路面三维形貌。Large-area 3D laser scanning is susceptible to interference from multi-frequency vibration noise of an acquisition vehicle,resulting in low accuracy of the acquired 3D pavement morphology.Traditional filtering and image processing techniques cannot perform component analysis and complex processes.Thus,a variational modal decomposition(VMD) algorithm based on the modified Harris Hawk optimization(AMHHO) algorithm is proposed to analyze the pavement components and achieve accurate stripping of multi-frequency vibration information.The pavement point cloud data acquired by the vehicle-mounted 3D laser camera is downscaled to obtain the pavement longitudinal profile signal.This signal is then decomposed by the proposed AMHHO-VMD algorithm to obtain intrinsic mode functions,which are then Fourier-transformed and combined with the vibration state of the acquisition unit to determine the multifrequency vibration information.Finally,the accurate 3D morphology of the pavement is obtained after reconstruction of the filtered effective components.Experimental results show that compared to the empirical mode decomposition(EMD)algorithm and wavelet packet decomposition algorithm,the proposed AMHHO-VMD algorithm can strip the multifrequency vibration components from the original pavement point cloud and obtain an accurate 3D morphology of the pavement.

关 键 词：激光扫描 路面三维形貌 变分模态分解 多频率振动 哈里斯鹰优化算法 

分 类 号：TP75[自动化与计算机技术—检测技术与自动化装置]