为了优化坩埚电阻炉熔炼Al-Cu系铸铝合金的生产工艺,设计了以双单片机为核心的控制终端RTU,对温度进行分段PID控制。应用表明,充分考虑控制器的热稳定性后,配置完善的温度控制和检测模块可实现对熔炼过程温度的精确控制,在730~750℃精炼温度范围内,绝对精度可控制在1.2℃内。 In order to optimize the production process of Al-Cu aluminum alloy for crucible resistance furnace smelting, a control terminal RTU with dual single-chip microcomputer as its core was designed, and the temperature was segmented by PID control. Application shows that fully consider the thermal stability of the controller, the well-configured temperature control and detection module can achieve precise control of the temperature of the melting process, the absolute accuracy can be controlled at 1.2 ℃ within the temperature range of 730 ~ 750 ℃.