基于Pt1000的滤光器测温系统设计

摘要

Aiming at the problems of the temperature measurement of birefringent filter during astronomy and meteorology,hardware and software structure of filter bridge type temperature measurement system is designed and least square method is adopted to fit calibration system,based on interconnected STM32 processor and three-wire type Pt1000 platinum thermal resistance.The experimental results show that the system can real time monitor temperature of center area of filter,and measurement error is ±0.005℃ near 42℃,measurement precision of apparent velocity in solar active region is guaranteed.%针对天文气象中双折射滤光器温度检测所遇到的问题,以互联型 STM32处理器、三线制铂热电阻Pt1000为基础,设计了滤光器桥式测温系统软硬件结构,并采用最小二乘法对标定系统进行了拟合.实验结果表明:该系统能实时监测滤光器中心区域的温度,在42℃时测量误差为±0.005℃,保证了太阳活动区视向速度的测量精度.