A method for evaluating the uniformity of seed distribution after sowing operation

Abstract

A method for evaluating the uniformity of seed distribution after sowing operations belongs to the technical field of agricultural machinery. The invention includes the following steps: establishing a three-dimensional coordinate system, the X axis is the center of the sowing row, the Y axis is perpendicular to the X axis, and the Z axis is perpendicular to the horizontal plane of the ground surface. The center of the sowing row; the theoretical sowing distance △x is known, and the sowing distance a is measured i‑1 , the distance deviation Y between the seed and the row center i , sowing depth Z i ;Calculate the vertical coordinate x of the actual sowing point i ; By seeking the minimum value of the square sum S of the vertical distance between the theoretical sowing point and the actual sowing point, the longitudinal index X is obtained i ;calculate X i , Y i and Z i standard deviation; draw seed horizontal plane and vertical surface distribution scatter diagram, and calculate the distribution area of ​​each surface; draw seed three-dimensional space distribution scatter diagram, and calculate distribution volume; Spot plots, distribution areas and volumes provide a theoretical basis for comparing, optimizing and improving planter or soil contact components.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery, and particularly relates to a method for evaluating the uniformity of seed distribution after sowing operations. Background technique [0002] The quality of sowing is directly related to the growth and yield of crops, and the performance of machinery and tools is one of the main factors affecting the quality of sowing. For a seeder, its ability to play seeds in a designated position in the soil is one of the important indicators for evaluating its performance. There are many factors that affect the distribution of seeds in the soil, such as the geometric shape of the seeds, the structure of the seeding tube, and the contact with the soil. Components (ditch opener, soil cover, compactor, etc.) structural parameters, seed quality and soil environment, etc. The traditional evaluation methods often use the seeding grain spacing qualification index, the seeding grain spacing mean, sta...

AI Technical Summary

Problems solved by technology

However, the current traditional evaluation methods are still limited to one-dimensional and vertical planes. In view of the shortcomings of traditional methods in combining the longitudinal distribution of seeds with the depth direction distribution and lateral distribution indicators, the system evaluation of the distribution of seeds in the horizontal plane and three-dimensional space is insufficient. , so the present invention proposes a new index for evaluating the uniformity of seed longitudinal distribution, which can be combined with traditional lateral and depth direction distribution indexes to realize the uniformity of seed distribution in one-dimensional, two-dimensional and three-dimensional System evaluation, the proposed evaluation method for seed distribution uniformity can provide a theoretical basis for comparison, optimization and improvement of planters or soil-touching parts, and is of great significance for improving the quality of sowing operations and increasing crop yield and income

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