Sowing device and control method therefor, and plant protection unmanned aerial vehicle

A sowing apparatus, comprising:

• a material container comprising a discharge port positioned at a lower portion of the material container;
• an opening size adjustment unit comprising a baffle and a baffle motor, the baffle being positioned at and movable relative to the discharge port, and the baffle motor being configured to drive the baffle to move relative to the discharge port to adjust an opening size of the discharge port;
• a discharging unit comprising a turntable positioned at a lower portion of the baffle and a turntable motor configured to drive the turntable;
• and
• a processor configured to obtain a target opening size of the discharge port and a target rotational speed of the turntable, to obtain a safe rotational speed of the turntable according to the target opening size, and to control a next-instance rotational speed of the turntable and a next-instance opening size of the discharge portion according to the target rotational speed and the safe rotational speed.

A plant protection unmanned aerial vehicle, comprising:

• a vehicle body, a vehicle arm, a power assembly, two end portions of the vehicle arm being respectively connected to the vehicle body and the power assembly, wherein the plant protection unmanned aerial vehicle further comprises a sowing apparatus positioned at a lower portion of the vehicle body, and the sowing apparatus comprises:
• a material container comprising a discharge port positioned at a lower portion of the material container;
• an opening size adjustment unit comprising a baffle and a baffle motor, the baffle being positioned at and movable relative to the discharge port, and the baffle motor being configured to drive the baffle to move relative to the discharge port to adjust an opening size of the discharge port;
• a discharging unit comprising a turntable positioned at a lower portion of the baffle and a turntable motor configured to drive the turntable;
• and
• a processor configured to obtain a target opening size of the discharge port and a target rotational speed of the turntable, to obtain a safe rotational speed of the turntable according to the target opening size, and to control a next-instance rotational speed of the turntable and a next-instance opening size of the discharge portion according to the target rotational speed and the safe rotational speed.