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针对目前低压铸造控制系统存在实时性差、控制精度低的问题,提出了基于STM32F107低压铸造智能控制系统的设计。采用压力变送器PTG501采集实时压力值,铂丝热电阻PT1000采集实时温度,采集的信号通过前置放大电路放大后送入控制器进行处理;主控系统以STM32F107控制器为核心,配备人机交互界面,电磁阀及伺服阀控制电路;利用改进的PID算法对采集所得信号进行处理,输出准确实时的控制量,从而实现铸件制造的智能控制。仿真实验证明:该智能控制系统稳定性好,且具备很好的实时性,控制精度高等优越性。
In order to solve the problem of low real-time control and low control precision, the design of low-pressure die-casting intelligent control system based on STM32F107 is proposed. The pressure transmitter PTG501 real-time pressure value acquisition, platinum wire RT100 thermal resistance real-time temperature acquisition, the collected signal amplified by the preamplifier circuit into the controller for processing; the main control system to STM32F107 controller as the core, equipped with man-machine Interactive interface, solenoid valve and servo valve control circuit; the use of improved PID algorithm to process the collected signal, the output accurate and real-time control volume, in order to achieve the intelligent control of casting manufacturing. Simulation results show that the intelligent control system has good stability, good real-time control and high control precision.