航天相机用基于1553B总线高精度温度控制系统

Space Camera Use High Precision Temperature Control System Based on 1553B Bus

摘要:

文章介绍了一种航天相机用基于1553B总线的测温控温系统的设计,测温部分通过电阻分压的方式采集热敏电阻的电压值进而计算出热敏电阻的阻值,从而得出热敏电阻的温度,控温部分通过PID控制方法驱动加热片进行温度补偿,达到目标温度值;文中介绍了系统的原理及电路实现、软件流程,对测温过程中产生的误差源进行了分析并提出修正方案;最后给出实测数据得出结论,该系统测温精度优于0.1℃,控温精度优于0.3℃。

Abstract:

This paper introduces the design of temperature measuring and controlling system based on 1553B bus which use for space camera. The circuit measure the resistance of thermistor through resistance divider, temperature compensation part use the PID control method. This paper introduce the principle of the system, the realization of the circuit and software flow first, then analyses the temperature measurement’s error source and the method to correction, finally list the experimental data and came to the conclusion that the temperature measurement accuracy is better than 0.1℃, the temperature control accuracy is better than 0.3℃.