植物表面结构重构技术研究与仿真模拟

摘 要

中国是农药生产和使用的大国，但由于施药方式和对植物润湿机理及其表面结构特性的不了解，农药的有效利用率低下。加之新型喷雾技术中，除了风送式喷雾技术推广较好之外，大多数的先进喷雾技术正处在推广和试验阶段，仍存在技术成熟度不满足成品化要求、稳定性差、精度低和成本高等问题。因此需要开展液滴在植物枝叶表面的润湿特性研究及表面结构研究。

利用三维表面重构技术建立植物表面结构模型、进行液滴撞击的数值模拟试验是对植物润湿性和液滴碰撞植物表面后运动特性进行研究最有效的途径之一。本研究通过点云算法建立微观结构更准确、结构细节更细致的可视化三维模型，帮助研究人员更好地了解植物表面特性对润湿性的影响。并在此基础上利用VOF方法进行液滴撞击仿真模拟试验，以研究液滴直径、下落高度、下落速度、黏度、密度以及植物表面的物理性质对喷雾液滴润湿的影响。为农药喷雾机械和喷雾设备的研制提供技术储备和理论基础。同时也可以为其他领域应用植物表面特性提供思路和想法。

关键词：表面重构；仿真模拟；液滴撞击。

Research and Simulation of Plant Surface Structure Reconstruction Technology

ABSTRACT

China is a big country in the production and use of pesticides. However, due to the application methods and the lack of understanding of the mechanism of plant wetting and its surface structure, the effective utilization rate of pesticides is low. In addition to the new spray technology, in addition to the promotion of air-feeding spray technology, most of the advanced spray technology is in the promotion and testing stage, there is still technical maturity does not meet the requirements of finished products, poor stability, low precision and cost. Higher problems. Therefore, it is necessary to study the wetting characteristics and surface structure of droplets on the surface of plant foliage.

The use of three-dimensional surface reconstruction technology to establish a plant surface structure model and numerical simulation of droplet impact is one of the most effective ways to study plant wettability and droplet motion after collision with plant surface. In this study, a point cloud algorithm was used to establish a visual 3D model with more accurate microstructure and more detailed structural details, which helped researchers better understand the effects of plant surface properties on wettability. Based on this, the simulation experiment of droplet impact using the VOF method can study the droplet diameter, drop height, falling speed, viscosity, density and physical properties of the plant surface on the spray droplet without being restricted by the site and equipment. The effect of wetting and yielding more accurate test data than traditional tests. Provide technical reserves and theoretical basis for the development of pesticide spray machinery and spray equipment. At the same time, it can also provide ideas and ideas for applying plant surface characteristics in other fields.