摘要
为解决TR组件稳定的工作温度和散热问题,提出一种基于STM32微处理器为核心,多通道温度同步采集的控制系统。STM32产生PWM经过DA芯片转换输出模拟信号,控制变频压缩机,同时采用PT100测量供液温度,结合位置式PID控制算法,单向控制加热器,实现温度调节,提高了供液温度的稳定性。通过RS232通信接口MODBUS RTU主从站模式与触摸屏通信,实现了人机交互。试验验证,温控系统满足了高精度多通道数据采集和温度控制,数据通信正常,设备工作稳定。
order to solve the problem of stable working temperature and heat dissipation of TR module,a multi-channel temperature synchronous acquisition control system based on STM32 microprocessor is proposed.STM32 generates PWM and outputs analog signal through D/A chip to control variable frequency compressor.At the same time,PT100 is used to measure the liquid temperature.Combined with position PID control algorithm,the heater is controlled in one direction to realize temperature regulation and improve the stability of liquid supply temperature.Through RS232 interface Modbus RTU master-slave modeand touch screen communication,human-computer interaction is realized.Experimental verification shows that the temperature control system meets the requirements of high-precision multi-channel data acquisition and temperature control,the data communication is normal,and the equipment works stably.
作者
刘吉名
白小峰
何世安
LIU Ji-ming;BAI Xiao-feng;HE Shi-an(Anhui Province National Laboratory of Thermal Management Technology,The 16th Research Institute of China Electronic Technology Corporation,Hefei 230088)
出处
《环境技术》
2020年第6期124-127,133,共5页
Environmental Technology
关键词
高精度
多通道
数据采集
PID算法
D/A转换
high-precision
multichannel
data acquisition
PID algorithm
D/A conversion
