An Adjustable Pneumatic Planter with Reduced Source Vibration for Better Precision in Field Seeding

Area of Science:

• Agricultural Engineering
• Precision Agriculture Technology
• Robotics in Agriculture

Background:

• Increasing agricultural output while minimizing resource inputs (seed, fertilizer, land, water) is crucial.
• Existing ground-wheel-driven planters face challenges like skidding, vibration, and difficult field adjustments.
• Need for advanced planting systems for efficient and precise seed placement.

Purpose of the Study:

• To develop and evaluate an electronically operated planter for precision agriculture.
• To address limitations of conventional planters, including ground-wheel skidding and adjustment difficulties.
• To optimize seed metering and depth control for improved planting accuracy.

Main Methods:

• Developed an electronically operated planter with individual brushless direct current (BLDC) motor-driven seed-metering plates and aspirators.
• Implemented a microcontroller-based control system with proportional integral derivative (PID) feedback for RPM control.
• Utilized a parallelogram-based depth control system (0-100 mm) and adjustable suction pressure.
• Optimized parameters (orifice size, vacuum pressure, forward speed) using a central composite rotatable design for cotton variety RCH 659.

Main Results:

• Optimized laboratory conditions: orifice diameter 2.947 mm, vacuum pressure 3.961 kPa, forward speed 4.261 km/h.
• Achieved a quality feed index of 93% and a precision index of 8.01% in laboratory tests.
• Field tests under optimized conditions yielded a quality feed index of 88.8% and a precision index of 12.75%.

Conclusions:

• The developed electronically operated planter offers precise control over seed metering and planting depth.
• The system effectively addresses limitations of conventional planters, enhancing planting efficiency.
• Optimized parameters ensure high quality and precision in seed placement for cotton cultivation.