Variable seeding control system and method based on dynamic prescription map

Abstract

The invention discloses a variable seeding control system and method based on a dynamic prescription map, and belongs to the technical field of agricultural machinery control. The method comprises the following steps: 1, detecting soil nutrients of a to-be-sown area, and transmitting the soil nutrients to a communication controller; 2, measuring the operation speed, latitude and longitude and course angle of the tractor, and transmitting the information to a communication controller; 3, transmitting the soil nutrient data and the coordinate information to a seeding rate decision controller; 4, converting measured single-point data into surface data, generating a real-time seeding rate prescription map, and returning seeding rate information to the communication controller; 5, converting the seeding quantity into rotating speed data of the brushless direct current motor, and transmitting the rotating speed data to each row of brushless direct current motor drivers; and 6, when the brushless direct current motor reaches the target rotating speed, driving the electric-driven precision seed-metering device to rotate. The installation position of the sensor can be determined, and the seeding rate regulation and control error is reduced; the problem that the variable seeding precision is reduced due to large single-point data errors is solved.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery control, in particular to a variable seeding control system and method based on a dynamic prescription map. Background technique [0002] Sowing is a key link in the process of crop production, and the quality of sowing directly affects the final yield of crops. At present, the precision seeding technology commonly used in production is to distribute the seeds evenly in the field according to the same seeding rate. However, this "equal treatment" sowing method ignores the differences in the growing environment of crops, and it is difficult to tap the potential of soil to increase yield, resulting in resource Underutilized. Therefore, in order to further improve crop yield and achieve optimal allocation of resources, the amount of seeds should be input according to the information of the crop growth environment and the law of crop growth and development, that is, variable seeding. ...

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Problems solved by technology

Patent CN109213050 discloses a variable seeding control system and its control method. The implementation of the sensor-type variable seeding control system is to immediately determine and regulate the seeding amount after collecting soil point data. Due to the spatial variation of soil nutrients Due to the nature and complexity of the farmland environment, this implementation method of variable seeding operation relying on the collection of a single sample point is very easy to use outliers as the original data for decision-making, which greatly reduces the accuracy of seeding amount decision-making; at the same time, this basis The implementation method of immediately adjusting the seeding rate with a single point of information will lead to frequent acceleration and deceleration of the drive motor of the seed meter, resulting in uneven planting spacing in the local area and affecting the final yield

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