基于STM32的砂温实时控制系统的设计

Design of Automatic Sand Temperature Control System in Lost Foam Casting Based on STM32

在铸造过程中,对砂温的控制的精确度严重影响铸造件的品质,针对消失模铸造过程中的砂温控制精度不足和实时性较差的问题,利用高性能、低能耗的STM32芯片,对铸造过程中的砂温控制系统进行了设计。该砂温控制系统首先选择铂丝热电阻对砂温进行实时采集;然后将温度信号转化为电信号,并作为输入量输入STM32微控制器,通过在微控制器建立的砂温PID算法控制模型,实现砂温控制标准与实测温度的比较计算;最后根据计算结果,控制喷淋装置冷却水量的大小,达到智能实现砂温控制的目的。实验结果表明,利用STM32芯片能够提高砂温控制的精度,同时缩短反应时间,起到快速准确的控制出砂温度,提高了效率。

An automatic sand temperature control system based on STM32 was proposed. The platinum thermal resistance was used to collect real-time temperature signal of sand, and then convert it into an electric signal to sent to the STM32 microcontroller as the core of the control system. The input signal was calculated by an improved PID algorithm.According to the calculation results, the controller uses the execution unit to control the water spraying device, so as to realize the intelligent control of sand temperature. The simulation results show that the sand temperature intelligent control system can control real-time sand temperature accurately when the sand temperature was adjusted.