Abstract
Most measurement and control systems of combines use digital tubes or LCD as their monitor, which has some problems like low brightness, poor functional expansion and over-occupy port resources. In this paper, a signal acquisition and failure alarm system of combine harvester is designed, based on touch screen technology. The system uses MCU as the main control unit to receive forward speed signal and rotational speed signals of threshing cylinder, transport grain auger and conveyor pan. It handles the signal data, makes judgments, and sends the signal data to the touch screen through serial communication. Some functions like parameters display, parameters setting and faults alarm are set in the touch screen. The system is applied to Taihu Star TH988 combine harvester and had rice harvest tests. The results show that it has good human-computer interaction and improves stability and accuracy, hardware structure and electrical design simplified.
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