Development of Micro-radioisotope Thermoelectric Power Supply for Deep Space Exploration Distributed Wireless Sensor Network  

作　　者：YUAN Zicheng LIU Kai LI Junqin WANG Hongyu LIU Yunpeng TANG Xiaobin 

机构地区：[1]Department of Nuclear Science and Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,Jiangsu,China

出　　处：《上海航天（中英文）》2020年第S01期13-19,共7页Aerospace Shanghai（Chinese&English）

基　　金：The Shanghai Aerospace Science and Technology Innovation Project (SAST2016112);the Funding of Jiangsu Innovation Program for Graduate Education (KYLX16_0355);the Short Visit Program of Nanjing University of Aeronautics and Astronautics(191108DF06)

摘　　要：A micro stacked-integrated annular-radial radioisotope thermoelectric(TE)generator(RTG) is innovatively proposed,an integrated prototype is prepared to drive an RF2500-based radiofrequency wireless sensor network,and the temperature of each node is monitored for a long time as a demonstration. A high-performance microRTG module based on the flexible printed circuit and bismuth telluride thick film is designed and prepared by screen printing. It is tested by a loading electrically heated equivalent radioisotope heat source. The output performance of the micro-RTG at different ambient temperatures is further evaluated. When it is loaded with238 PuO2 radioisotope heat sources,the integrated prototype will generate an open-circuit voltage of 0.815 V,a short-circuit current of 0.551 mA,and an output power of 114.38 μW at 0.408 V. When it is loaded with a90 SrTiO3(or241 AmO2)radioisotope heat source,the prototype will generate 66.38%(or 6.15%)of the output power(compared to238 PuO2). In the impact evaluation on the ambient temperature, the electrical output performance of the prototype increases when the temperature increases from-30 ℃ to 120 ℃. In the evaluation of the effects of long-term radioisotope irradiation,the output performance decreases slightly when the irradiation dose increases during the service period. The stackintegrated micro-RTG developed in this study is expected to provide reliable power support for space micro-scientific instruments,especially distributed wireless sensor networks.

关 键 词：DEEP AMBIENT loaded 

分 类 号：V447[航空宇航科学与技术—飞行器设计] TP212.9[自动化与计算机技术—检测技术与自动化装置]