基于Linux的自动超越补偿控制系统设计

以S3C2440A微处理器为核心，设计了一种基于嵌入式的排种器漏播自补种控制系统。该系统以激光传感器监测漏种、霍尔传感器监测排种器转速，通过监测排种器内部漏充种情况提前预知漏播，提出了一种基于超越离合器的漏播自补种控制算法，控制排种器自身的超越旋转实现自动补种，设计了可视化交互界面监控播种情况和故障报警。实验结果表明：漏种监测和转速监测准确率为100%，系统的补种成功率和补种后粒距合格指数在19.96 r/min转速以下能达到100%，在19.96 r/min以上时达到98%，补种及时，准确。

Design of automatic over-compensation control system based on Linux

In order to solve these problems,an automatic reseeding system based on Linux is designed. The system uses S3C2440A as core. The system adopts a Hall sensor to get the speed of the seed-metering device. A laser sensor is used to monitor the loss of seeds. The system can monitor inside of the seed-metering device to foresee the loss. An automatic reseeding control algorithm based on overrunning clutch is proposed. Through the control algorithm,the seed-metering device can overrun itself to reseed,an interactive visualization interface is designed to monitor the loss of seeds and give failure warning to the user if the seed-metering device has a breakdown. Experimental result shows that the accuracy rate of the loss and speed monitoring are 100%,the reseeding rate and the qualified index of seed space both are 100% while rotating speed is lower than 19. 96 r/min and are 98%while rotating speed is higher than 19. 96 r/min,the automatic reseeding system can reseed timely and accurately.