基于光学成像技术的泥沙颗粒级配及形态测定方法研究

项目名称： 基于光学成像技术的泥沙颗粒级配及形态测定方法研究

项目编号： No.51309083

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 水利工程

项目作者： 陈红

作者单位： 河海大学

项目金额： 26万元

中文摘要： 泥沙颗粒粒径、形态、圆度和级配等参量测定是研究泥沙运动和河床演变规律的基础。常用颗粒分析方法有筛分法、沉降法、电阻法和激光粒度法，上述方法只能获取粒径和级配，不能同时直接获取形态信息，影响了对泥沙运动规律的认识和基础理论研究深度。本项目拟基于光学成像技术，研发一种新型、无透镜的泥沙颗粒分析方法，解决常规图像分析法中测量范围窄、处理速度慢、形态信息单一等问题。拟重点研究利用泥沙颗粒分散技术、光学成像装置和图像处理技术，获取泥沙颗粒在平行光源照射下的投影信息，构建泥沙颗粒大小、阻光特性、光强、图像灰度值等参量间的数学关系，通过实时动态监测泥沙颗粒不同时刻截面投影，获取最大、中间和最小粒径，实现泥沙颗粒形状系数的准确测量；并基于分形理论，建立泥沙颗粒形状分形维数计算方法，实现泥沙颗粒形态的定量描述。成果有望发展泥沙颗粒分析理论，解决宽级配、不规则形状泥沙颗粒测量问题，为泥沙学科研究提供技术保障。

中文关键词： 泥沙颗粒分析；RGB；图像处理；行搜索法；颗粒表面分形维数

英文摘要： Determination of sediment particle size, morphology, roundness and grading is foundtion to study the movement of sediment and riverbed evolution. The normal methods of Sediment grain size analysis has sieving, sedimentation， resistance and Laser particle size method, above methods can only obtain grain size and gradation can not directly obtain morphological information, which effect the depth of understanding and basic theoretical research on sediment motion. Based on optical imaging technology, the project will develop a new method of lensless optical imaging and measurement system, which can abtain size, roundness, grading and shape information, and solve problem of measuring range is narrow, slow processing speed, morphological information single issues such as conventional image analysis. The project will focus on sediment particle dispersion technology, optical imaging device and image processing technology,and establish the mathematical relations of sediment particle size, the light resistance characteristic, light intensity, gray value and other parameters,to restructure sediment particle informtion.Through dynamic monitoring projection information of sediment particles in different time, and obtain maximum, intermediate and minimum particle size,relize to measure particle shape coefficient. Based on the

英文关键词： Sediment particle analysis；RGB；Image processing；Line search method；Fractal dimension of particle