Dot-jet type seed metering method and device

Abstract

The invention relates to a dot-jet type seed metering method. The method comprises the following steps: S1, calibrating parameters: calibrating and storing dot-jet type seed metering control parameters; S2, vibrating and queuing to discharge seeds: filling seeds into a conical cylinder through a seed adding port, controlling the conical cylinder to vibrate, enabling the seeds to flow under the action of vibration, and discharging and falling from a seed discharging head; S3, friction acceleration: enabling two sides of the fallen seeds to generate friction force in the same direction as a preset ejection direction, so that the seeds are discharged at a high speed at an acceleration corresponding to the friction force; and S4, direction adjustment: guiding the direction of the seeds discharged at a high speed, so that the seeds are accurately shot to a target position. According to the method, seeds can be discharged at a high speed, the influence of an environment wind field is reduced, the unmanned aerial vehicle can still achieve accurate seeding while keeping a high flight height, meanwhile, arching and blocking of the seeds in the seed discharging process can be avoided, the seeds are queued at a high speed, the seeding efficiency is improved, and the method can be used for seeding operation and seeding operation. And the device can also be used for single-particle rapid discharging operation of other particle materials. The invention also relates to a dot-jet type seed metering device.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery, and more specifically, to a method and device for spot-shooting type seeding. Background technique [0002] Mechanized seeding 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 precision, and is crucial to ensure the quality of work and realize precise work. Especially in the mechanized sowing operation of rice seeds, because there are many varieties of rice, the physical characteristics and planting agronomic requirements of different varieties of rice are quite different. For example, the best precision of hybrid rice sowing is 2-3 grains / hole. When designing the sowing device, it is necessary to fully consider the adaptability of the device to different varieties of rice, so as to meet the sowing needs of different varieties of rice. [0003] At present, the...

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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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