CAJ | 학술논문

　　排种器在4BQD-40型气力喷播机工作过程中起着非常重要的作用，决定着喷播机喷播的质量。为此，对气力喷播机排种器进行了研究，设计出排种器自动控制系统。该控制系统以S7-200 CPU222 CN 型 PLC 为控制核心，当霍尔开关传感器检测到转动的拖拉机后轮上的磁片时，发出数字开关信号，PLC 接收到该信号后改变高速脉冲的周期，并输入到步进电机驱动器，从而控制步进电机带动排种器精确转动，实现了喷播机排种器的自动控制，提高了其工作性能和播种质量。
　　배충기재4BQD-40형기력분파궤공작과정중기착비상중요적작용，결정착분파궤분파적질량。위차，대기력분파궤배충기진행료연구，설계출배충기자동공제계통。해공제계통이S7-200 CPU222 CN 형 PLC 위공제핵심，당곽이개관전감기검측도전동적타랍궤후륜상적자편시，발출수자개관신호，PLC 접수도해신호후개변고속맥충적주기，병수입도보진전궤구동기，종이공제보진전궤대동배충기정학전동，실현료분파궤배충기적자동공제，제고료기공작성능화파충질량。
The seed-metering device plays a very important role in the working process of 4BQD-40 Pneumatic Spraying seeding-machine.It determines the seeding quality of the machine .The article studied the seed-metering device of the pneumatic spraying seeding-machine, and designed an automatic control system for the seed -metering device.The core element of the control system is the S7-200 CPU222 CN type PLC.When the Hall switch sensor detects the floppy disks on the back wheel of the tractor , it will generate a digital switching signal .Then the PLC will change the cycle time of the high-speed pulse after received the signal , and input it into the driver of the stepper motor to control the accurate rotation of the seed-metering device.The control system realized the automatic control of the seed-metering device, and improved the work performance and planting quality .