Abstract: A door detection method includes controlling a door of a spreading apparatus to move toward to a preset position, obtaining first status information of an associated component of the door when the door stops moving, and determining whether the door has moved to the preset position according to the first status information and second status information. The second status information is status information of the associated component when the door is located at the preset position.

Abstract: A door detection method includes controlling a door of a spreading apparatus to move toward to a preset position, obtaining first status information of an associated component of the door when the door stops moving, and determining whether the door has moved to the preset position according to the first status information and second status information. The second status information is status information of the associated component when the door is located at the preset position.

Abstract: A sowing apparatus controlling method includes obtaining a target opening size of a discharge port and a target rotational speed of a turntable, obtaining a safe rotational speed of the turntable according to the target opening, and controlling a next-instance rotational speed of the turntable and a next-instance opening size of the discharge port according to the target rotational speed and the safe rotational speed.

Abstract: A sowing machine includes a stirring mechanism and a material detecting mechanism. The material detecting mechanism includes a driven member, a magnetic member, and a Hall effect sensor. When not blocked by material in the sowing machine, the driven member is configured to rotate under a driving force of a rotating shaft of the stirring mechanism, and drive the magnetic member to rotate; and the Hall effect sensor is configured to detect a first signal corresponding to the magnetic member indicating material absence. When blocked by the material, the driven member is configured to stop rotating under a resistance of the material, and stop driving the magnetic member to rotate; and the Hall effect sensor is configured to detect a second signal corresponding to the magnetic member indicating material presence. Whether the material exists is determined based on the first or the second signal.