A method for evaluating seed distribution uniformity after seeding operation

Abstract

A method for evaluating seed distribution uniformity after seeding operation belongs to the technical field of agricultural machinery and comprises the following steps: establishing a three-dimensional coordinate system with an X axis as a seeding line center, a Y axis perpendicular to the X axis and a Z axis as a seeding line center perpendicular to a surface water plane; based on a known seedingtheoretical grain spacing Deltax, measuring the seeding grain spacing a<i-1>, seed and row center distance deviation Yi and sowing depth Zi; calculating a longitudinal coordinate xi of an actual sowing point; obtaining a longitudinal index Xi by solving a quadratic sum S minimum value of a longitudinal distance between a theoretical sowing point and an actual sowing point; calculating the standard deviation of Xi, Yi and Zi; Drawing seed horizontal plane and vertical plane distribution scatter diagrams, and calculating the distribution area of each plane; Drawing a seed three-dimensional space distribution scatter diagram, and calculating the distribution volume; By comparing the standard deviation, the seed distribution scatter diagram, the distribution area and the volume of each direction index, a theoretical basis can be provided for comparing, optimizing and improving a seeder or a soil touch part.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery, and in particular 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 place 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 geometry of the seeds, the structure of the seed tube, and the contact with the soil. Components (openers, mulchers, packers, etc.) structural parameters, seed quality and soil environment, etc. For the uniformity of seed vertical distribution, the traditional evaluation method often uses the qualified index of sowing grain distance, the...

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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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