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RFHUI:an RFID based human-unmanned aerial vehicle interaction system in an indoor environment 被引量:2
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作者 Jian Zhang Zhitao Yu +5 位作者 Xiangyu Wang yibo lv Shiwen Mao Senthilkumar CG.Periaswamy Justin Patton Xuyu Wang 《Digital Communications and Networks》 SCIE 2020年第1期14-22,共9页
In this paper,we present an RFID based human and Unmanned Aerial Vehicle(UAV)Interaction system,termed RFHUI,to provide an intuitive and easy-to-operate method to navigate a UAV in an indoor environment.It relies on t... In this paper,we present an RFID based human and Unmanned Aerial Vehicle(UAV)Interaction system,termed RFHUI,to provide an intuitive and easy-to-operate method to navigate a UAV in an indoor environment.It relies on the passive Radio-Frequency IDentification(RFID)technology to precisely track the pose of a handheld controller,and then transfer the pose information to navigate the UAV.A prototype of the handheld controller is created by attaching three or more Ultra High Frequency(UHF)RFID tags to a board.A Commercial Off-The-Shelf(COTS)RFID reader with multiple antennas is deployed to collect the observations of the tags.First,the precise positions of all the tags can be obtained by our proposed method,which leverages a Bayesian filter and Channel State Information(CSI)phase measurements collected from the RFID reader.Second,we introduce a Singular Value Decomposition(SVD)based approach to obtain a 6-DoF(Degrees of Freedom)pose of the controller from estimated positions of the tags.Furthermore,the pose of the controller can be precisely tracked in a real-time manner,while the user moves the controller.Finally,control commands will be generated from the controller's pose and sent to the UAV for navigation.The performance of the RFHUI is evaluated by several experiments.The results show that it provides precise poses with 0.045m mean error in position and 2.5∘mean error in orientation for the controller,and enables the controller to precisely and intuitively navigate the UAV in an indoor environment. 展开更多
关键词 Radio-Frequency Identification(RFID) Human Computer Interaction(HCI) Unmanned Aerial Vehicle(UAV) Singular Value Decomposition(SVD) Localization NAVIGATION
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面向脉搏血氧监测系统的三元阳离子锡铅钙钛矿基高灵敏、快响应近红外光电探测器
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作者 吕一博 岑国标 +2 位作者 李婉君 赵传熙 麦文杰 《Science China Materials》 SCIE EI CAS CSCD 2023年第12期4704-4710,共7页
血氧饱和度已成为继心电图、呼吸和血压后的一项用于健康评价的重要生理参数.本研究中,我们制备出高质量窄带隙三元阳离子Sn-Pb钙钛矿薄膜,该光电薄膜呈现择优的生长晶向,且光吸收截止边拓宽至961 nm.通过双界面层修饰,构建的PPPB(PEDOT... 血氧饱和度已成为继心电图、呼吸和血压后的一项用于健康评价的重要生理参数.本研究中,我们制备出高质量窄带隙三元阳离子Sn-Pb钙钛矿薄膜,该光电薄膜呈现择优的生长晶向,且光吸收截止边拓宽至961 nm.通过双界面层修饰,构建的PPPB(PEDOT:PSS/perovskite/PCBM/BCP)近红外光电探测器展现出增强的光电响应,极快的响应速度(373 ns),宽的线性动态范围(LDR=159 dB),高的比探测率(D*=1.56×10^(11)Jones),以及优异的光响应度(190 mA W^(−1)).基于器件出色的光电性能,我们探索并演示了该探测器在脉搏血氧仪系统中的应用,实现了对不同生理状态下心率和血氧饱和度的准确和非侵入性评估.本研究突显了三元阳离子锡铅钙钛矿光探测器在实时监测血氧饱和度和心率方面的应用潜力. 展开更多
关键词 detector NEAR-INFRARED Sn-Pb perovskite oxygen blood oxygen saturation
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