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DESIGN OF CAN-BASED VARIABLE RATE FERTILIZER CONTROL SYSTEM

机译：基于CAN的变速肥料控制系统设计

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摘要

A novel control system for variable rate fertilizer application based on CAN bus is presented. The system consists of variable rate controller based on DSP, ground speed sampling unit and light-bar guidance unit. These units form a control area network based on CAN bus. The variable rate controller collects signals of GPS position and ground speed, and calculates the conveyor feed shaft rotate speed according to the prescription map stored in local memory. Then the variable rate application can be realized through PID control of the shaft rotate speed. Light-bar guidance unit helps the operator to steer the machine moving by equal spacing parallel passes for less overlap and missing in operation. The effectiveness of the developed system is confirmed by the experiments using the communication protocol special for the application based on CAN bus.
机译：提出了一种基于CAN总线的新型变量施肥控制系统。该系统由基于DSP的可变速率控制器，地面速度采样单元和灯条引导单元组成。这些单元构成基于CAN总线的控制区域网络。可变速率控制器收集GPS位置和地面速度的信号，并根据存储在本地存储器中的处方图计算输送机进给轴的转速。然后可以通过PID控制轴的转速来实现可变速率的应用。灯条引导单元可帮助操作员以等间距的平行行程控制机器运动，以减少重叠和操作失误。通过使用基于CAN总线的专用通信协议进行的实验，证实了所开发系统的有效性。

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