Design of the control system for picking up and feeding seedlings of automatic transplanter based on PLC

Aiming to solve the problems of low efficiency and low stability of the automatic transplanter at present, a picking and feeding control system of the cavity plate seedling combined the self-designed automatic transplanter device was designed using programmable logic controllers（PLC） and a field experiment was carried out. The experiment showed that the system could realize the coordination of picking and feeding seedlings through PLC control of multiple cylinders and stepper motors. When the transplanting rate was 60-120 plants/min, the success rate of feeding seedlings and the integrity rate of seedlings were both greater than 95%. The control system could adapt to the automatic transplanting operation under different transplanting rates, which realized efficient and stable automatic transplanting.