Method and device for spot-firing seed metering

Abstract

The invention relates to a method for spot-ejection type seed metering, comprising the following steps: S1 calibration parameters: calibrating and storing spot-ejection type seed metering control parameters; S2 vibrating queuing out seeds: filling seeds into a cone through a seed feeding port to control the vibration of the cone , the seeds flow under the action of vibration, and are discharged from the seed head; S3 friction acceleration: the same friction force as the preset injection direction is generated on both sides of the falling seeds, so that the seeds can be discharged at high speed with an acceleration corresponding to the friction force; S4 Adjust the direction: guide the seeds discharged at high speed, so that the seeds can be accurately shot to the target position. The method can discharge seeds at a high speed, reduce the impact of environmental wind field, enable the drone to maintain a relatively high flying height and still achieve accurate sowing, and at the same time, avoid arching and blocking of the seeds during the seeding process, so that the seeds are lined up at a high speed for seeding. Improve seeding efficiency, not only can be used for seeding operations, but also for single-grain rapid discharge operations of other granular materials. The invention also relates to a point-shot type seed metering device.

Description

technical field [0001] The present invention relates to the technical field of agricultural machinery, and more particularly, to a method and device for spot-firing seed metering. Background technique [0002] Mechanized sowing is an important means to achieve efficient and standardized operations in crop production. The seed metering device is a key component to control the seeding rate and its accuracy, which is essential to ensure the quality of work and achieve accurate work. Especially in the mechanized sowing of rice seeds, due to the large variety of rice varieties, the physical characteristics and planting agronomic requirements of different varieties of rice seeds are quite different. When designing a planting device, it is necessary to fully consider the adaptability of the device to different varieties of rice to meet the sowing needs of different varieties of rice. [0003] At present, the existing seed metering devices at home and abroad mainly include outer g...

AI Technical Summary

Problems solved by technology

The device is mainly used for small smooth seeds and other materials. Different sizes of seeds need to be equipped with different sizes of grinding discs, which increases the complexity of accessories manufacturing, matching, use and storage. It is difficult to achieve single-grain, continuous, and queuing. , in addition, the seed breakage rate is higher

[0009] The pneumatic seeding device uses the large-diameter seeding wheel at the bottom of the seed box to send the seeds into the airflow pipe, and the seeds are transported to the distributor by the airflow in the pipe, and then enter the seed ditch through the airflow seeding pipe. The device is more uniform in seeding , low seed damage rate, but complex structure, high manufacturing precision requirements

[0010] In the above-mentioned prior art, to realize displacement control in the seeding process, most of them use rotating parts, and the following problems mainly exist in the control of the rotating parts: 1) pulsation phenomenon inevitably occurs in the seeding process, which affects the continuity and uniformity of the seeds ; 2) The overlapping rate of the discharged seed particles is high, and the effect of single seed queuing is not good; 3) When the rotational speed of the rotating parts is too high, it is easy to appear the phenomenon that the seeds cannot be filled, so it is difficult to realize high-speed seeding; 4) The seeds are in the In contact with rotating parts, interactions such as rolling and friction are prone to occur, and the seed damage rate is high; 5) The seeds are easy to arch and block in the seed box or pipeline, resulting in blockage, and the device lacks the function of self-breaking arch; 6) The structure of the device is complex, and when there is an arch blockage or cleaning is required after the operation is completed, the disassembly workload is large

[0014] The above-mentioned seed metering device for unmanned aerial vehicle sowing operations has the following deficiencies: 1) After the seeds are discharged from the seed metering device, due to the interference of the rotor wind, the position of the seeds falling is uncontrollable, and the uniformity of the seeds falling is not good; 2) the seeds fall on the surface, It is easy to be eaten by birds and rodents or washed by rain, resulting in lack of seedlings; 3) The seed meter is easy to be arched and blocked; 4) Using the method of spreading, the seed fall is disorderly, no rows and no holes, and the crops have poor ventilation and air permeability, which is easy to breed diseases and insect pests , and it is not convenient for field management during the growth period, etc.

This device adopts the friction wheel to accelerate the seeds, which reduces the interference of the rotor wind on the whereabouts of the seeds, but the device has the following disadvantages: 1) there are many types of crops, and there are differences in the external dimensions of the seeds of different varieties of the same crop, and the size and shape of the seeds of the same variety are different. It is also difficult to achieve the same, and the distance between the friction wheels in the prior art cannot be adjusted adaptively with the different shapes of the seeds, which may easily cause damage or blockage; The limit is large, and the seeds cannot be lined up into the friction wheel, which is prone to the problem of seed jamming; 3) During operation, it is necessary to adjust the motor according to the pitch angle, so it is difficult to achieve precise sowing

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