Method and device for monitoring motion state of seeds in vibration seed tray of seed metering apparatus

Abstract

The invention provides a method and device for monitoring the motion state of seeds in a vibration seed tray of a seed metering device, which is mainly used for monitoring the motion state of seeds in the vibration seed tray during precision seeding and seedling raising of paddy rice and other granular grains with irregular shapes and small and medium sizes. The invention is characterized in that sensitive elements are arranged on the inner surface of the vibration seed tray of the seed metering apparatus in a multi-point manner and used for monitoring the impact signals of seeds in different areas of the seed tray; characteristic signals including seam thickness, dispersion degree and the like of seeds in a measuring area are obtained through a signal modulation circuit; and a secondary instrument collects parameters of the characteristic signals real-timely, performs multi-information fusion and calculates according to an established seed quantity monitoring model and an established seed dispersion state monitoring model so as to obtain the quantity, the distribution uniformity and the dispersion degree of seeds in the vibration seed tray. The method and device implements real-time monitoring of the motion state of seeds in the vibration seed tray of the seed metering apparatus and can provide a seed adding signal and a control signal of the vibration parameter of the seed tray.

Description

technical field [0001] The invention belongs to the technical field of monitoring the movement state of seeds in a vibrating seed tray of a seeding mechanism, and in particular relates to a method for monitoring the movement state of seeds in a vibrating seed tray of a precision seed metering device. Background technique [0002] Sowing is an important technical link in the process of agricultural production, and the seed metering device is the core component to realize mechanized precision sowing. The air suction seed metering device has high operating performance and efficiency, and is a relatively advanced sowing method. extensive development. At present, the use of reciprocating vibrating seed discs to excite thin-layer seeds, so that the seeds are separated from each other to reduce the resistance of seed suction, is the main technical means to improve the sowing accuracy. Quantity, vibration state and distribution law are all dynamic parameters. As the number of sowin...

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Problems solved by technology

At present, the use of reciprocating vibrating seed discs to excite thin-layer seeds, so that the seeds are separated from each other to reduce the resistance of seed suction, is the main technical means to improve the sowing accuracy. Quantity, vibration state and distribution law are all dynamic parameters. As the number of sowing increases, the number of seeds in the seed tray will gradually decrease. Factors such as machine vibration and road surface roughness can easily lead to uneven distribution of seeds in the vibrating seed tray. , the seed layer in some areas is too thick to be effectively dispersed, and the seed layer in some areas is too thin to even have no seeds. The research results show that the change in the number of seeds and the uneven distribution directly lead to the increase of the leakage rate, which seriously affects the suction and discharge. Seed accuracy has become a bottleneck in the development of precision seeding technology. Therefore, how to monitor the number and movement of seeds in real time, use multi-information fusion feedback to control the vibration parameters of the seed tray, and automatically add seeds to the seed tray to always maintain the ideal seed quantity and movement. The distribution state has important theoretical research significance and practical value, and there is no public research report so far

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