为解决高温热分解法制备稀土上转换纳米发光材料时,合成条件苛刻、重现性差且需多段控温等问题,本文研究研制高精度自动化制备系统。系统以STM32F429IGT6为主控,搭载UCOSIII操作系统,采用EMWIN设计界面,可设置30段温度曲线,控温范围0~300°C、精度±0.9°C。硬件层面,通过PT100传感器结合Modbus RTU协议实现温度采集,依托PID算法输出两路PWM信号控制固态继电器,从而控制热电阻与磁力搅拌器通断。同时搭配霍尔传感器检测转速,闭环共同完成温度调节与恒温;系统采用一体化钣金设计,兼容多数设备。测试表明,其能稳定控温 75 °C（ ± 0.5 °C）、120 °C（ ± 0.9 °C）,提升制备效率与安全性,具有商业化前景。

To address the challenges associated with high-temperature thermal decomposition synthesis of rare earth upconversion nanoluminescent materials-such as stringent process conditions,poor reproducibility,and the requirement for multi-stage temperature control-this study presents the development of a high-precision automated preparation system.The system is centered on an STM32F429IGT6 microcontroller,integrated with the UCOSIII real-time operating system and featuring a graphical user interface developed using EMWIN.It supports the programming of up to 30 temperature profiles,with a controllable temperature range from 0 to 300 °C and a regulation accuracy of ±0.9 °C.On the hardware side,temperature acquisition is achieved via PT100 sensors in conjunction with the Modbus RTU communication protocol.A PID-based control algorithm generates two PWM signals to drive solid-state relays,enabling precise on-off control of heating resistors and a magnetic stirrer.Additionally,a Hall-effect sensor monitors stirring speed, allowing for closed-loop coordination between thermal and stirring subsystems to ensure accurate temperature regulation and stable isothermal operation.The system features an integrated sheet metal enclosure design,ensuring mechanical robustness and compatibility with a wide range of laboratory equipment.Experimental results demonstrate stable temperature control at 75 °C（±0.5 °C）and 120 °C（±0.9 °C）,significantly enhancing both preparation efficiency and operational safety.The system exhibits strong potential for commercialization.