【摘要】 针对高精度石英谐振式露点仪中所涉及的露点温度双闭环跟踪控制的问题，本文提出了一种基于双半导体制冷器的主控温系统，该系统采用STM32作为主控芯片，利用PID控制算法通过DAC分别对两路半导体制冷器进行驱动和温度跟随控制。该系统在-15～15℃温度范围内进行了控温效果试验，结果显示该主控温系统线性制冷速率误差不高于10%，连续线性控温精度高，可为基于双制冷面的高精度石英谐振式露点仪实现双闭环露点跟踪测量提供有效的温控解决方案。更多还原

【Abstract】 Aiming at the problem of double closed-loop tracking control of dew point temperature in high-precision quartz resonant dew point meter, a temperature control system of resonant dew point meter based on double semiconductor cooler was proposed.The system uses STM32 as the main control chip and uses PID control algorithm to drive and follow the temperature of two semiconductor coolers through DAC. The temperature control system is tested in the temperature range of-15～15 ℃. The results show that the linear cooling rate error of the main temperature control system is no more than 10%, and the continuous linear temperature control precision is high. It can provide an effective temperature control solution for the high-precision quartz resonant dew point meter based on double cooling surfaces to realize double closed-loop dew point tracking measurement.更多还原