Feeding quantity regulation and control system and method for combine harvester

Abstract

The invention provides a feeding quantity regulation and control system and method for a combine harvester. The regulation and control system comprises an IMU1, an IMU2, a pressure sensor, a GPS receiver and a controller, when the current feeding quantity is within the rated range, the height of a header and the operation speed of the harvester are kept unchanged, when the feeding quantity is not within the rated range, the IMU detects the posture of a vehicle body and the posture of a header inclined conveyor, the header height and a current hydraulic cylinder position corresponding to the header height are obtained through combination, the expected header height is preset, the expected header hydraulic cylinder position is obtained, the error between the expected header hydraulic cylinder position and the current hydraulic cylinder position is obtained, then the controller adjusts a proportional valve to drive the hydraulic cylinder to stretch out and draw back, and the header height is controlled to be stabilized at the expected position. Based on the speed variation, the controller controls the rotating speed of a hydraulic motor by adjusting a flow valve, and then the numerical value of the changed vehicle speed is stabilized. The height and the forward speed of the header are combined, the stable feeding amount is kept, and the efficient operation efficiency is kept.

Description

technical field [0001] The invention belongs to the field of agricultural automation, and in particular relates to a system and method for controlling the feeding amount of a combine harvester. Background technique [0002] Combine harvester is an important equipment in agricultural production. With the continuous expansion of actual operation scenarios and application scale, the automation degree of harvesters has become an important research direction. Realizing the stable control of the feeding amount of the harvester is conducive to reducing the rate of grain loss and improving work efficiency. [0003] There are many factors that affect the feeding amount of the harvester, and manual judgment requires a wealth of prior knowledge. When the traditional harvester is operating, the driver needs to pay attention to the density of crops, the height of the stubble and the forward speed, etc., in order to make the feeding amount of the harvester. Stable, this way of working w...

AI Technical Summary

Problems solved by technology

[0003] There are many factors that affect the feeding amount of the harvester, and manual judgment requires rich prior knowledge. When operating a traditional harvester, the driver needs to pay attention to crop density, stubble height, and forward speed, etc., so that the harvester’s feeding amount Stable, this way of working will increase the labor intensity of the driver

In the prior art, the feeding amount is detected by installing torque sensors on the conveying shaft of the harvester, the header power shaft, and the drum shaft. However, the installation of the torque sensor greatly changes the machine body, is not easy to fix, and has low measurement accuracy, Information lag and other issues; the existing technology also uses machine vision or laser radar to estimate the density of the crops in front of the harvester, and control the feeding amount in combination with the operation speed adjustment, but the actual measurement results are easily affected by the light and the calculation speed is slow. Considering the simultaneous adjustment of stubble height and forward speed, the stable control of feeding amount can be realized only through a single regulation of harvest speed; the existing technology also uses traditional distance measuring devices such as profiling boards or ultrasonic waves to control stubble height, but it is susceptible to Effects of straw and soil etc.

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