Device and method for self-adaptive control of seed suction position of suction cup of air-suction seed metering device

Abstract

The invention provides a self-adaptive control device of seed sucking position of sucking disk of gas sucking type seed sowing device and a method thereof; a horizontal linear sliding table module and a vertical straight line sliding table module which are intersected in a cross form are mounted at the upper part of the frame; a sucking disk is fixedly installed on the slide block of the vertical straight line sliding table module; a displacement sensor measures vertical displacement of the sucking disk; multiple weighing sensors are installed at the bottom face of the seed disk so as to measure the seed cluster thickness in different zones of the seed disk; a theoretical analysis and the test are combined, thus a seed sucking position control model of which seed disk can effectively absorb seeds can be set up, and the model is input to the controller. During the seed sucking process, the controller integrates the changing characteristics of the cluster thickness in the vibrating seed disk collected in real time, the structure and the working parameter of the seed sowing device; according to the control strategy of the seed sucking position, a driving motor control signal of a linear sliding table module is output, thus the seed sucking position of the sucking disk can be self-adaptively adjusted along with the change of the cluster thickness and distribution change in the vibrating seed disk, thereby improving the seed sucking performance of the seed sowing device.

Description

technical field [0001] The invention belongs to the technical field of precision seedling raising and sowing, and in particular relates to an adaptive control device and method for the suction position of a suction cup of an air-suction seed metering device. Background technique [0002] Seedling cultivation and transplanting are the main rice planting methods in my country, and the seed metering device is the core component for realizing mechanized seedling cultivation and sowing. The air-suction disc seed metering device is mainly composed of a suction cup and a vibrating seed tray. It has high operating efficiency, low seed damage rate, and easy control of the seeding amount per tray. It is an ideal device for paddy blanket seedling sowing. By applying small-amplitude high-frequency excitation to the seed disc, the populations are in a discrete state in the seed disc to reduce frictional resistance, which is an important technical means to improve the accuracy of seed suc...

AI Technical Summary

Problems solved by technology

Although applying exciting vibration to the seed tray is beneficial to reduce frictional resistance, it will also increase the fluidity of the population, which is likely to cause uneven distribution of the population in the seed tray, with thicker populations in some areas and thicker populations in some areas. Small

The current seed meter generally uses a proximity switch to locate the seed suction position of the suction cup, and the seed suction position is fixed, so it is difficult to solve the above problems, and the continuous seed suction performance is unstable.

Therefore, it has important theoretical research significance and practical value to design a device and method that can adaptively control the sucking position of the sucker according to the change of the population thickness and distribution state in the vibrating seed tray to improve the sowing accuracy. There are published research reports

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