System and method for controlling feed amount of combine harvester

Abstract

The present invention provides a system and method for regulating the feeding amount of a combine harvester. The regulating system includes IMU1, IMU2, a pressure sensor, a GPS receiver and a controller. The current feeding amount is within the rated range to maintain the header height and harvest The operating speed of the machine remains unchanged. When the feeding amount is not within the rated range, the IMU detects the posture of the vehicle body and the tilting conveyor of the header, and combines it to obtain the height of the header and the corresponding current hydraulic cylinder position at this height. By presetting the expected header Height, the obtained expected header hydraulic cylinder position, based on the error between the expected header hydraulic cylinder position and the current hydraulic cylinder position, and then through the controller to adjust the proportional valve to drive the hydraulic cylinder to expand and contract, to control the header height to stabilize at the expected position; based on the speed change , the controller controls the hydraulic motor speed by adjusting the flow valve, and then stabilizes the value of the vehicle speed after the change. The height and forward speed of the combined harvesting unit of the present invention maintain a stable feeding amount and high operating efficiency.

Description

technical field [0001] The invention belongs to the field of agricultural automation, and in particular relates to a system and a method for controlling the feeding amount of a combine harvester. Background technique [0002] The combine harvester is an important equipment in agricultural production. With the continuous expansion of actual operation scenarios and application scale, the degree of automation of harvesters has become an important research direction. Realize the stable control of the feeding amount of the harvester, which is conducive to reducing the loss rate of grains and improving work efficiency. [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, such a working method will increase the labor intensity...

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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