| Based on embedded computer, the embedded system becomes the new developing trend in the IT field at the tail of network. Having characteristics of little volume, high performance, low power consumption and reliability, embedded systems have been widely used in many fields such as national defense, consumer electronic products, network communication and industry control, etc. The applications of 32bit micro controller units and embedded operation system are representative in these fields.Mainly used in coal feeder system in thermo-power plant, the electronic gravity coal feeder takes up the task of feeding coal of fixed amounts to the boiler continuously and equally. The coal feeder control system implements accurate measurement of burning coal in the process of running and controls coal feeder rates according to the artificial setting values and feedback information so that the burning coal transmitted into the boiler can accommodate with the fuel needed. It realizes accurate feedstock to helps customer reduce material waste, upgrade quality and improve producing automation. The electronic gravity coal feeder takes great significance in energy saving, profits promotion and safety assurance.The coal feeder control system designed in this paper takes PID operating through instantaneous coal flowing on steelyard and the burning coal control. Outputting necessary signal to motor controller, the system changes the speed of belt to maintain the coal feeder flowing of demand.Firstly, the paper introduces the inner architecture and operational principle of 32bit ARM controller. Secondly, it introduces the operationalprinciple of embedded real-time operating system -|jC/OS-II and the design of hardware circuit of coal feeder control system. It migrates the embedded real-time operating system --uC/OS-IIin S3C44B0X and finishes control software programming and testing which can meet the demand of control. |
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