基于CAN总线的有效载荷温度测控系统

温度是有效载荷系统设计中的一个重要参数,针对空间粒子探测器阿尔法磁谱仪(AMS),介绍一种基于CAN总线的分布式有效载荷温度测控系统。系统采用数字式温度传感器DS18S20作为温度检测元件,以单总线实现远程数据采集模块的多点温度检测。基于探测器的地面测试系统,实验分析了数字式温度传感器空间应用的可靠性,并从软硬件角度提出了改善系统可靠性和测量精度的方法。

Temperature Measurement and Control System for Payload Based on CAN Bus

Temperature is an important design parameter for experiments and operation in spacecraft and its payload systems.This paper introduces the CAN bus based distributed temperature measurement and control system for Alpha magnetic spectrometer,a particle physics detector which will be running at international space station.Digital thermometer DS18S20 is adopted as temperature sensor,and multi-drop measurement capability can be achieved in a single data acquisition module through 1-wire bus.Based on the ground test system,the reliability of the digital thermometer in space application is analyzed through experiments,and the approaches to improve the reliability and the precision of measurement are discussed from the perspectives of software and hardware.