项目以番茄等小颗粒不规整作物种子为研究对象，针对其流动性差，难于实现精量播种这一技术难题，提出基于气吹悬浮供种和多次取种清种思想的气吸滚筒式番茄育苗精量播种器的设计方案，应用气动悬浮理论和气固两项流仿真技术对种子悬浮特性和种子吸附过程的运动学、动力学特性进行分析，构建验证其种子悬浮吸附过程的数学方程，揭示其运动变化规律及其影响因素间的内在关系；采用摄像观察、物理试验和图形分析的方法，探讨气吹悬浮供种系统的各参数及其交互作用对气吸滚筒式播种器吸附性能的影响机理，确定影响吸附性能的主要参数和水平变化范围。结合播种器滚筒主要参数，搭建不同供种层数的播种器试验台，通过正交试验研究，获得播种机取种性能影响因素的回归方程，利用MATLA软件对回归方程进行综合优化分析，找出最优的参数组合。提出播种器改进方案，合理配置结构与参数，研发具有自主知识产权的精量育苗播种器，满足番茄育苗播种一穴一粒的技术要求。

It is hard to achieve precision seeding for the tomatoes and flower seeds which have a small volume, irregular forms and the poor liquidity. In order to solve this technical problem, a new kind of pneumatic roller-type tomatoes precision seeder has been proposed, based on the theory of the pneumatic suspension seed supply and many times seeding. By analyzing the kinematic characteristics of the adsorbent process when the seeds are supplied by the pneumatic suspension seed supply device with the theory of pneumatic suspension and the gas-solid two-phase flow simulation technology, we construct the mathematical equations of the seeds suspension and adsorbent, and this research reveals the change regularity of seeds`movement characteristics and the internal relationship of effect factors; The research discusses the parameters and the interactive effect of parameters with each other, and also their influence on the adsorption suction of the pneumatic roller-type tomatoes precision seeder, with the method of camera observation, physics experiment and graphical analysis, to determine the main parameters and the range of change level . Combined with the main parameters of the seeder, setting up a series of multistage seeder test stand, we can get the linear regression of the extra factors which resolve the rate of single seed, though orthogonal test. We work out the best parameters, by optimizing the linear regression based on the software of MATLA. We put forward improvement project, rational configuration of structure and parameters, we develop a new kind of precision seedling seeder which has the independent intellectual property rights and meet the production requirements that each hole has single seed.