Abstract: A system includes a hollow shaft, a drum, an absolute encoder, a driving mechanism, a conveyor belt, a photoelectric sensor, and a controller. A structural optimization design method of the drum is provided on the basis of theoretical calculation of a seeding track of the drum-type seed-metering device, a theoretical model of a conveying position of a tray and a seed-metering angle is built with the aim of continuously sowing grains to the center of each hole, the conveying position of the tray and a rotating position of suction holes on the drum are monitored in real time on a seedling raising line, and a difference value between the actual position of the suction holes and the theoretical seed-metering angle and a change rate of the difference value are calculated and serve as input parameters to design a fuzzy controller of the rotation speed of the drum.

Abstract: A system includes a hollow shaft, a drum, an absolute encoder, a driving mechanism, a conveyor belt, a photoelectric sensor, and a controller. A structural optimization design method of the drum is provided on the basis of theoretical calculation of a seeding track of the drum-type seed-metering device, a theoretical model of a conveying position of a tray and a seed-metering angle is built with the aim of continuously sowing grains to the center of each hole, the conveying position of the tray and a rotating position of suction holes on the drum are monitored in real time on a seedling raising line, and a difference value between the actual position of the suction holes and the theoretical seed-metering angle and a change rate of the difference value are calculated and serve as input parameters to design a fuzzy controller of the rotation speed of the drum.

Abstract: A battery assembly for an electronic vaporization device includes: a first circuit board for controlling operation of the electronic vaporization device; a second circuit board, stacked with the first circuit board, an orthographic projection of the second circuit board on the first circuit board not exceeding a maximum distance of the first circuit board in a length direction or a width direction; and a plurality of light emitting elements arranged on a surface of the second circuit board away from the first circuit board.

Abstract: The present invention provides a three-degree-of-freedom hybrid vibratory screening mechanism, a control method thereof, and a harvester. The three-degree-of-freedom hybrid vibratory screening mechanism comprises a frame, a vibrating screen, a first driving mechanism, a second driving mechanism, sensors and a controller; parallel drive of hydraulic motors are used for achieving two-degree-of-freedom rotational adjustment of the horizontal attitude angle and inclination angle of the screen surface of the vibrating screen, and the first driving mechanism drives the vibrating screen to reciprocate in one degree of freedom, so as to realize three-degree-of-freedom vibration adjustment of the screen surface; a vibration parameter control model is established by means of theoretical analysis in combination with experiment.

Abstract: A self-adaptive control system comprises a feeding device, a rotary coder, a displacement sensor, a hydraulic regulation system and a controller, wherein, the input end of the controller is electrically connected with the rotary coder, the displacement sensor, a first oil pressure sensor and a second oil pressure sensor respectively, and the output end of the controller is electrically connected with a solenoid directional valve via an interlocking controller; the controller takes the bearing force of piston rods and the rotation speed and the rotation speed change rate of a feeding knife roller as input variables and takes the positions of the piston rods as an output variable, to establish a fuzzy control model of the feeding mouth opening of the feeding device, the extension and retraction of the piston rods in a left oil cylinder and a right oil cylinder under hydraulic driving are regulated actively by controlling a three-position four-way solenoid directional valve, and thereby self-adaptive control of

Abstract: The present invention provides a three-degree-of-freedom hybrid vibratory screening mechanism, a control method thereof, and a harvester. The three-degree-of-freedom hybrid vibratory screening mechanism comprises a frame, a vibrating screen, a first driving mechanism, a second driving mechanism, sensors and a controller; parallel drive of hydraulic motors are used for achieving two-degree-of-freedom rotational adjustment of the horizontal attitude angle and inclination angle of the screen surface of the vibrating screen, and the first driving mechanism drives the vibrating screen to reciprocate in one degree of freedom, so as to realize three-degree-of-freedom vibration adjustment of the screen surface; a vibration parameter control model is established by means of theoretical analysis in combination with experiment.

Abstract: The present invention provides a self-adaptive control system for feeding mouth opening of a round bale bundling machine and a controlling method thereof.