偏光显微镜热台温度控制系统的研制

Design of Temperature Control System of Microscope Heating Stage for High-Temperature Microscopy

针对现有热台存在着人工控温劳动强度高、控温精度低等问题, 设计了一个基于AT89C51的自动温度控制系统. 给出了系统设计实现方法, 包括温度的测量、热电偶的冷端温度补偿、变速积分PID控制算法及参数自整定的实现方法. 实际使用证明, 该系统具有较高的测控精度和稳定性, 能较好地满足热台的温度控制要求.

To solve the problem of high labor intensity and low accuracy of temperature control in the application of artificial temperature control in the existing heating stage,an automatic temperature control system based on AT89C51 is designed. An executing method for the system design,including temperature measurement, temperature automatic compensate of the cold junction of the thermocouple, algorithm for gearshift integral PID control and parameter self-setting are proposed.It is proved from experiments and practical application that the system possesses high tracking accuracy and stability and can satisfy the demands for the temperature control of heating stage.