Abstract: Under the rice-oil rotation model in Jiangsu Province, an electric control seeding system was designed to solve the leakage problem during seeding caused by the ground wheel slippage due to the wetness of rice soil, and the automation transformation of the current mechanical double seeder for rapeseed was conducted. In the proposed system, the seeding parameters were determined and sent to the main processing controller according to the computer-loaded sowing operation information, map data and real-time acquired GPS position during the seeding operation, and the PID control algorithm was introduced. The closed-loop control algorithm combined the target hole distance and the forward speed, and used a DC motor to control the rotation speed of the seeding shaft to achieve accurate seeding of rapeseed. The test results showed that the highest variation coefficient of motor rotation speed was 4.85%, and the highest variation coefficient of the target hole distance in the bench test was 15.28%, which was higher than that of the traditional method, and the work response time was short.

Key words: rapeseed seeding machine, seeding control, field orientation