Self-adaptive oblique vibration seed disk mechanism and control method

Abstract

The invention provides a self-adaption inclined vibration seed disc mechanism and a control method thereof. The self-adaption inclined vibration seed disc mechanism is mainly used for precision sowing and seedling raising of middle and small rice grain seeds with irregular shapes and the like. The device mainly comprises at least three sets of screw rod straight-line stepping motors, a nut and a spherical head join bearing which are in supporting connection with an adjusting supporting plate; a straight-line rail is vertically and fixedly mounted on the adjusting supporting plate and is connected with a seed disc through a slide block; the seed disc is driven by a crankshaft-connecting rod mechanism to do reciprocated vibration; weighing sensors are mounted at a plurality of points in the seed disc and are used for monitoring the quantity of seeds in different regions in the seed disc; a controller is used for collecting output signals of the weighing sensors in real time; an established distribution state of the seeds in the seed disc is fitted and an adjusting scheme of a seed disc vibration direction angle is provided; feedback adjusting signals provided by the screw rod straight-line stepping motors are output to realize the self-adaption adjustment on the reciprocated vibration direction angle of the seed disc; the seed groups are accelerated to be uniformly dispersed and sequentially flow in the vibration seed disc, and the seed suction precision is improved.

Description

technical field [0001] The invention belongs to the technical field of precision seedling raising and sowing, and in particular relates to a self-adaptive inclined vibrating seed disc mechanism and a control method. Background technique [0002] Sowing is an important technical link in the agricultural production process, and the seeder is the core component for realizing mechanized precision sowing. With the continuous expansion of the planting area of ​​super rice, the precision of seedling raising has been increased from 3 to 5 grains / hole to 1 to 2 grains / hole, which is conducive to the occurrence of tillers after transplanting and the growth of individual plants, forming a high-yield population structure. The disc suction precision seed meter is mainly composed of two parts: a vibrating seed disc and a negative pressure sucker. By applying a small high-frequency excitation to the seed disc, the population is in a uniform and discrete state in the seed disc to reduce fri...

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Problems solved by technology

The seed distribution state in the vibrating seed tray is an important factor affecting the performance of the seed metering device. Due to the many interference factors such as the attitude of the seed metering device, ground fluctuations, and machine vibration during operation, the single-degree-of-freedom vertical reciprocating vibration method is commonly used at present. , it is easy to cause uneven distribution of populations in the vibrating seed tray. Some areas have thick seed layers and cannot be effectively dispersed. Therefore, how to design a seed plate mechanism with adjustable vibration direction, through real-time monitoring of the distribution state of seeds in the vibrating seed plate, adaptive feedback control of the vibration direction angle of the seed plate, and always maintain the ideal uniform distribution of seeds State, in order to improve the seeding accuracy, has important theoretical research significance and practical value

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