1-wire测温技术皮纳卫星星载应用研究  

Study on 1-wire Temperature Measurement Technique for Pico-Satellite Application

作　　者：袁春柱[1] 李军予[1] 刘思远[1] 

机构地区：[1]航天东方红卫星有限公司,北京100094

出　　处：《计算机测量与控制》2016年第12期28-31,36,共5页Computer Measurement &Control

基　　金：国家重大科技专项工程

摘　　要：随着皮纳卫星功能的增加以及集成化的提升,传统热敏电阻测温方法由于其电缆走线复杂、电缆数量多的缺点,不利于皮纳卫星的集成化,因此提出了基于1-Wire总线的测温方法;针对航天应用的特点,对1-wire测温芯片DS18B20进行了空间环境适应性分析;根据测温芯片的空间环境敏感性,提出了一种高可靠的设计思路;通过软硬件一体化设计,引入卫星测温安全模式,避免测温芯片在轨失效的问题;该方法通过卫星搭载,在空间中进行了应用验证,结果表明基于1-Wire总线的测温方法可在轨有效并可靠地测量卫星各设备的温度,实现了商用测温芯片的在轨应用,同时降低了星上温度测量拓扑的复杂性;该方法不但满足了卫星温度测量的要求,而且很大程度上减轻了卫星测温电缆的重量,减少了AD转换的路数,提高了皮纳卫星的集成度,具有推广应用的前景。Traditional thermal resistance temperature measurement method is not conductive to the integration of pico-- satellite due to its complexity and large number of cables, as the number of pico--satellite functions increases and the integration enhances. A method of meas- uring temperature based on 1--wire is proposed. The space environment adaptability of DS18B20 with 1--wire technique is analyzed aiming at the characteristics of space applications; A high reliable design solution is presented based on the space environment sensibility of the tem- perature measurement chip; Through satellite temperature measurement safe mode, the problem of on--board chip invalidating is avoided based on the integration design of hardware and software. The method proposed has been validated on the satellite, the results show that the design concept of the application using 1--wire technique is feasible and reliable to measure the equipment temperature on board; The com- mercial temperature measurement chip has been applied on--board; The complexity of the temperature measurement topology structure is re- duced. The method, which can reduce the satellite temperature cable weight and the number of ADC and improve the integration of the pico --satellite, has the prospect of popularization and application.

关 键 词：皮纳卫星 1-Wire总线 测温技术 DS18B20 

分 类 号：V474[航空宇航科学与技术—飞行器设计]