Abstract: Aiming at the current poor quality of vegetable sowing and fertilization, a wheeled self-propelled sowing and fertilization integrated operation mode was put forward in this paper. According to functional requirements of the chassis height adjustment, precision seed metering, fertilizer and sowing fertilizer collaborative operation and wheeled self-propelled, PLC microcontroller was taken as the core, and systems of the precision sowing and fertilizing linkage control, intelligent sowing depth control and wheeled four-wheel drive walking were designed respectively, and the relationship model between forward operation speed and forward operation speed was established. Then, the touch-screen control system was also developed. Finally, the self-propelled vegetable precision sowing and fertilizing control system were integrated and developed. Further, the system performance test was carried out, and the results show that the fertilizer discharge accuracy of the machine reaches 0.1 g. Setting the seed distance to 150 mm, the test results show that the error between the average value of the detected seed distance and the preset value is 2.7%-6.5%; Setting the depth of sowing fertilizer to 30 mm, the test results show that the error between the average value of the detection depth and the preset value is 12.7%-16%.

Key words: precision, wheel motor, electric putter, intelligent speed control