【摘要】 为避免地轮打滑对播种均匀性产生的不利影响,保证较好的播种质量,该研究设计了一种播种机的自动控制系统,利用步进电机驱动排种器。系统以AT89C55单片机为控制核心,采用旋转编码器实时采集播种机作业时前进速度信息,微处理器(CPU)进行速度判断,并结合对种子粒距(或播量)的设置,实时调节步进电机的转速,以带动排种器按需播种。另外,该系统还能实现液晶显示、声光报警等辅助功能。试验结果表明,系统工作性能稳定可靠,能够满足播种时设定的要求。更多还原

【Abstract】 In order to avoid the adverse effects of wheel sliding on the seeding uniformity and ensure good sowing quality,a intelligent control system with stepping motor driving the seeder was designed.AT89C55 micro control unit(MCU) was used as control core,and the real-time seeding advancing speed was detected by the rotary encoder.Judged the speed and set the seeding space(or sowing rate) by microprocessor(CPU),this system regulated the stepping motor speed to drive the device to sow as needed.In addition,this system realized some auxiliary functions,such as liquid crystal display(LCD) and acousto optical alarm.The results showed that the system was stable and reliable,and could meet the seeding requirements.更多还原