小麦小区条播机电控排种系统设计与试验

Design and Test of Electronic Control Seeding System for Wheat Plot Drill

针对小麦小区条播机排种系统智能化水平低的问题,本文基于差分定位原理设计了一套小麦小区条播机电控排种系统。该系统主要由北斗差分定位系统、STM32F4主控系统、锥体格盘驱动系统、离心分种驱动系统和人机交互系统等组成,主控系统采集北斗差分定位信息计算锥体格盘匹配转速,控制格盘电机和分种电机运转,并显示作业信息。通过正交试验法优选了离心分种器结构参数,建立了播种机车速和锥体格盘转速控制模型。试验结果表明:各行排量一致性变异系数为5.69%,均匀性变异系数为20.77%,验证了本电控排种系统的可行性。

Aiming at the problem of low intelligent level of wheat plot seeding system,a wheat plot seeding system was developed based on the principle of differential positioning.The system mainly consisted of Beidou differential positioning system,main controlsystem based on STM32F4,cone grid disk drive system,centrifugal seed dispenser drive system and human-computer interaction system,etc.The main control system collected the Beidou differential positioning information to calculate the matching speed of the cone grid,then controled the grid motor and seed motor to run,and displayed the operation information.The centrifugal seed dispenser structure parameters were optimized by orthogonal test method,and the control model of plot drill speed and cone grid disk speed was established.The test results showed that the coefficient of variation of consistency of each row was 5.69%and the coefficient of variation of uniformity was 20.77%,which verified the feasibility of this electronically controlled seed dispersal system and provided reference for further design of precision plot seeders.