基于MATLAB平台的风沙跃移颗粒轨迹追踪技术  

Trajectory Tracking Technology of Wind-Blown Sand Saltating Particles Based on MATLAB Platform

作　　者：蒋缠文 JIANG Chanwen(School of Environment and Life Sciences,Weinan Normal University,Weinan 714099,China)

机构地区：[1]渭南师范学院环境与生命科学学院,陕西渭南714099

出　　处：《渭南师范学院学报》2024年第11期81-87,共7页Journal of Weinan Normal University

基　　金：国家自然科学基金青年项目:基于风沙两相流同步观测的风沙跃移颗粒动态演化过程研究(41901012);中国博士后基金面上二等资助项目:基于轨迹图像的风沙跃移颗粒受力机制研究(2019M663615);陕西省教育厅科研计划项目:微塑料在渭河湿地多环境介质中的污染特征及其迁移规律(22JS017)。

摘　　要：风沙流中的跃移颗粒约占总输沙通量的75%,是风沙颗粒的主要运动形式。但风沙颗粒运动的微观和宏观研究并没有得到有效统一,致使跃移运动的研究进展缓慢。主要原因是受测量技术的限制,对于宏观和微观研究的桥梁(跃移颗粒运动参数的统计特征)的研究还不够深入。鉴于此,文章发展了基于MATLAB平台的风沙跃移颗粒运动轨迹数字化重构算法,通过对高速摄影系统获得的风沙跃移颗粒在实验风洞中运动的连续图像序列进行颗粒识别、颗粒匹配和曲线拟合等过程,继而获得跃移沙粒在轨迹各点的速度和角度等运动参数。Salting particles in aeolian sand flow constitute 75%of the total sediment transport flux and represent the prin-cipal movement form of aeolian sand particles,thereby attracting extensive attention from scholars.Nevertheless,up to now,the micro and macro studies of aeolian sand particle movement have not been effectively integrated,resulting in a sluggish progress in the research of saltation movement.The primary cause lies in the constraint of measurement technology,as a bridge between macro and micro research(the statistical characteristics of saltation particle motion parameters)has not been resolved satisfactorily.In light of this,a digital reconstruction algorithm for the movement trajectory of saltation particles of wind-blown sand based on the MATLAB platform is developed.Through the continuous image sequence of saltation particles of wind-blown sand moving in the experimental wind tunnel acquired by the high-speed photography system,sand recogni-tion,sand matching,and fitting curve are implemented.Subsequently,the motion parameters such as velocity and angle of saltation sand at each point of the trajectory are obtained.

关 键 词：风沙颗粒 跃移运动 风洞试验 轨迹参数 MATLAB 

分 类 号：P931.3[天文地球—自然地理学]