Technical field

The invention relates to a sowing device in the technical field of agricultural sowing, in particular to a precision seed adding device for a pneumatic vibrating precision seeder.

Technical background

Sowing is an important link in the process of agricultural production. With the rapid development of economy and society, the continuous progress of agricultural science and technology, and the implementation of precision agriculture, higher requirements are put forward for sowing quality. Seeder is the main means to realize mechanized precision seeding technology, and its performance directly affects the quality of seeding and the growth of crops and yields.

The seedling precision seeder is a kind of air-suction vibration precision seeder. The seeds are in a state of "boiling" motion due to vibration. In the suction process, the suction tray is filled with vacuum negative pressure, and the seeds are absorbed by air suction. A two-degree-of-freedom manipulator drives the suction cup to move to a certain position directly above the seedling tray, and an industrial computer controls the conversion of a set of solenoid valves to realize the switch of positive and negative air pressure, and the seeds are precisely sown under the action of gravity and positive jet. It can overcome many shortcomings of mechanical seeding device, and the requirement for the geometric size of seeds is not strict. It is easy to achieve single seed on-demand sowing, and has the advantages of high operation speed, low seed damage rate and so on.

During the sowing process, the quality of seeds in the vibrating seed tray changes constantly. In order to keep the seeds in a better "boiling" state under the action of vibration and reduce the occurrence of holes caused by the failure of the seed suction tray, an accurate quantitative seed adding device is needed to keep the seed quality in the seed tray within the required range in one sowing cycle. This keeps the thickness of the seed layer in the seed plate in a reasonable range, so that the population of the seed plate vibrated by the seeder can maintain an ideal "boiling" motion state, and ensure the precision sowing requirements of the air-sucking vibration precision seeder.

The invention relates to a small amount of fine seed adding device of an air suction vibration type seeder with fuzzy control, which can realize automatic quantitative seed adding by using the fuzzy control method, and solves the problems that the population thickness is too thick and the population "boiling" movement is not ideal when a large number of seeds are added at one time, and provides conditions for further realizing the precision sowing automation of field seedling raising by air suction vibration disc and improving the qualification rate of sowing.

Content of invention

The invention aims to provide an automatic fine and small amount seed adding device, simplify the working process of manual weighing and seed adding, and at the same time keep the seed quality in the vibrating seed tray within the required range, so that the population can maintain the ideal "boiling" movement state, realize the continuous fine and small amount seed adding mode, and solve the problem that the population thickness is too thick and the population "boiling" movement is not ideal when a large number of seeds are added.