Design Of Water Jet Sowing Device By Controlling Seed And Water Respectively And Experimental Study

Bunch planting with water jet, a new concept for planting, was first put forward by Professor Du Ruicheng of Shandong University of Technology in 2001. It is a kind of untouched soil planting, which uses high pressure water-jet to form a hole and seed in it. Further research and innovation based on the existing research is going on. Above all, the simple water-jet planting of seed and water controlled separately has been designed. The seeder includes three parts, the equipment of high-pressure water supply, precision seeding system and seed-metering device and controlling system. The three parts was put into together in a car, so planting experiment can be easily operated in a plate.In this paper the focus of the study is to design control system. This system with the core of SCM AT89S51 can realize accuracy control. Control system is mainly made up by the photoelectric detection circuit, solenoid valve control circuit, SCM system, keyboard and display circuit, interrupts control system and acousto-optic alarm circuit. The key point is to guarantee water-jet and seed-metering in harmony. The course of the work is as follows: When the seed at the blocked plate, the detection circuit detects it, signal to the microcontroller, and then solenoid valve starts controlling water-jet to form a hole. Subsequently, opening solenoid valves which control jet and blocked plate to accelerate seed, and last make the seed into the hole.