论文部分内容阅读
为研制适合牧草培育需要的小区播种机,并分析分种锥结构对种子分散均匀性的影响,制作了牧草小区播种排种器试验台,对种子在分种锥上的受力和运动进行理论分析。根据受力模型建立了二阶常微分方程组并求出了种子在给定初始条件下的相对运动和绝对运动轨迹的数值解。采用4种带不同导流槽数目的分种锥进行种子分散均匀性单因素试验,并用试验数据相对每次处理平均值的残差值建立了正态概率图进行检验。根据运动轨迹的求解可知,带导流槽的分种锥结构对种子分散均匀性有一定影响。单因素试验结果表明,导流槽个数增加会增大种子分散均匀性变异系数。正态概率图表明种子在排种器内进入各个格盘内的质量的残差值符合正态分布。
In order to develop a plot planter suitable for forage breeding and analyze the effect of segregation cone structure on the uniformity of seed dispersal, a test stand of forage seed metering device was made, and the theory of stress and motion of seeds on seed cone analysis. The second order ordinary differential equations are established according to the force model and the numerical solutions of the relative and absolute trajectories of the seed under a given initial condition are obtained. Four kinds of seed cone with different numbers of diversion slots were used to carry out the single factor test of the uniformity of seed dispersal. The normal probability graph of the test data relative to the average value of each treatment was used for the test. According to the solution of the motion trajectory, we can see that the sub-cone structure with diversion groove has some influence on the uniformity of seed dispersion. The result of single factor experiment shows that the increase of diversion channel will increase the variation coefficient of uniformity of seed dispersion. The normal probability plot shows that the residuals of the masses entering the cells in the seed metering device are in normal distribution.