基于激光测距仪的地面不平度的测量与分析  

Measurement and analysis of terrain roughness using distance laser sensor

作　　者：张晓冬[1] 李建桥[1] 王洋[1] 邹猛[1] 魏灿刚[1] 

机构地区：[1]吉林大学工程仿生教育部重点实验室,长春130022

出　　处：《吉林大学学报（工学版）》2013年第5期1258-1263,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50875107);“863”国家高技术研究发展计划项目(2010AA101401-3)

摘　　要：将6种平均粒径的石英砂制备成不平地面,使用基于激光测距仪的测量地面不平度专用装置,采集不平地面的空间数字信息并对预处理后的信息进行分析,通过对平均表面不平度标准差h-rms和平均地面能量Pav与平均粒径dav关系拟合曲线以及空间自功率谱密度曲线与频率轴形成的面积的物理意义的分析表明:Pav与地面不平度具有良好的相关性,因此可使用地面能量P实现对地面不平度定量分析;对双对数坐标空间自功率谱密度曲线的拟合直线分析表明,随着地面不平度的增加,拟合直线斜率lg(b)值增大,证明了所提出的通过分析直线拟合方程之间的相对位置和截距来评估地面不平度方法的可靠性。Rough terrains were prepared using quartz sand with six average particle sizes in a mini-size bin. A special instrument equipped with distance laser sensor was used to collect the digital information of the surface morphology of the rough terrains, and analyze the pretreated data. The fitting curves of the average Root Mean-Square （RMS） height and the average terrain energy as functions of the mean particle size, the physical meaning of the areas enclosed by the frequency axis and the auto power spectrum density curves indicate that the average terrain energy and the terrain roughness have obvious relationship. Thus, the terrain energy can be used to analyze the terrain roughness quantitatively. The analysis of the linear fitting result of the double logarithmic auto power spectrum density curve shows that the slope of the linear fitting line increases with the terrain roughness. It proves the reliability of using the relative positions of linear fitting lines and the slopes to evaluate the roughness of the terrain.

关 键 词：道路工程 地面不平度 地面能量 自功率谱密度 激光测距仪 

分 类 号：U411[交通运输工程—道路与铁道工程]