Sowing component with electronic system for dosing medium size seeds
Keywords:
Control, Arduino, encoder, electric motor, agricultural robotAbstract
The objective of this work was to develop a seed drill with electronic control for medium-sized seed metering. It was designed with a straight chisel to open the soil, open source Arduino was programmed for variable metering and depth calibration. A third-point hitch and a vertical disc metering device were adapted. A NEMA 34 stepper motor and a linear actuator with a 10 cm stroke were used for the hitch. A wheel with a known perimeter was attached and instrumented with an incremental encoder to measure the distance traveled. An Arduino ATmega 2560 card was programmed. For the evaluation, conventionally tilled soil was used with five 25 m furrows and three repetitions. Finally, a seeding body with a third-point hitch was obtained. The maximum measured speed of the agricultural robot was 4.6 km h-1 in the field with a towing capacity greater than that required by the seeding body. The total weight was 10 kg, with a length of 60 cm and a width of 25 cm. Variable single-seed planting was achieved with 10 to 30 cm spacing between seeds and up to 10 cm depth.
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