关键词: 草莓移栽机, 控制系统, 打穴机构, 种植机械

Abstract: Aiming at the agronomic requirements for directional transplanting of strawberries with high ridges, a transplanting machine is designed, which can make holes mechanically and manually identify the direction of the back of the strawberry seedlings. Based on PLC, the whole machine control system is designed, including the constant speed walking control system of the transplanter, the front wheel steering control system, the hole drilling control system and other task modules. The whole machine adopts a DC brushless motor as the driving element of the chassis. According to the output value of the motor's own encoder, the walking speed, the planting distance and the punching frequency of drilling are coordinated and controlled. The stepping motor is used as the driving element of the drilling mechanism. The switch positions the hole punching mechanism, and the hole punching process is completed through the cooperation of the two, and the strawberry seedling transplanting is completed under the cooperative operation of man and machine. The test results show that when the single row transplanting efficiency is 15 plants /min, with plant spacing of 150 mm, 200 mm, and 250 mm, the qualified rates of plant spacing, hole depth, and aperture are all above 95%, with a coefficient of variation of less than 5%. The success rate of hole drilling is also above 95%, which is in line with the industry standard of transplanting machine, the effect of hole drilling and transplanting meets agronomic requirements.

Key words: strawberry transplanter, control system, punching mechanism, planting machinery