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面向电力设备的温度检测节点功耗研究及自供电电源设计 被引量:9
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作者 郭宝宁 《数据采集与处理》 CSCD 北大核心 2018年第6期1112-1118,共7页
对电网中电力设备进行实时的温度检测是避免电网设备故障与安全事故的重要手段,采用非接触式的无线测温技术是近年来电力系统向智能化发展的重要体现。针对智能电网的发展需求,设计了一种基于无线射频通信技术的温度检测节点,该节点由... 对电网中电力设备进行实时的温度检测是避免电网设备故障与安全事故的重要手段,采用非接触式的无线测温技术是近年来电力系统向智能化发展的重要体现。针对智能电网的发展需求,设计了一种基于无线射频通信技术的温度检测节点,该节点由温度传感器DS18B20、超低功耗单片机PIC18LF14K50与无线射频收发芯片MRF49XA组成,可实现休眠等待、数据采样处理与无线通信3种工作状态。通过设置不同工作状态下的关键参数,对温度检测节点的平均功耗进行测试比较,总结归纳了节点功耗规律。在此基础上,为温度检测节点设计了一种基于LTC3588-1芯片的自供电电源管理单元,采用成熟可靠的感应电流取能技术满足温度检测节点的自供电需求。研究表明,当节点处于充满电状态时,一旦切断能量源,节点仍能持续稳定工作47h,足以维持温度检测节点的正常工作直至电网恢复正常运行。 展开更多
关键词 电力设备 温度检测 无线方式 功耗研究 感应取能 自供电
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Surface acoustic wave-based ultraviolet photodetectors: a review 被引量:3
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作者 Yi Zhang Yao Cai +7 位作者 Jie Zhou Ying Xie Qinwen Xu Yang Zou Shishang Guo Hongxing Xu Chengliang Sun Sheng Liu 《Science Bulletin》 SCIE EI CAS CSCD 2020年第7期587-600,M0004,共15页
Over the past decade, ultraviolet(UV) detection has been a subject of major interest for both research scientists and engineers because of its important applications in both the civil and military fields. The rapid de... Over the past decade, ultraviolet(UV) detection has been a subject of major interest for both research scientists and engineers because of its important applications in both the civil and military fields. The rapid development of interdisciplinary research has enabled the realization of UV detectors based on a variety of principles. Among these devices, UV detectors based on surface acoustic wave(SAW) technology offer unique advantages of remote wireless operation capability and zero power consumption. This article provides a comprehensive review of the working principles, important parameters, and the acoustic wave and materials types used in SAW-based UV detectors. The research and development status of these detectors are discussed and the most commonly used methods to optimize device performance are also summarized. Novel types of acoustic UV detectors based on thin film bulk acoustic resonators(FBARs)and Lamb wave resonators(LMRs) are briefly introduced. Finally, future development challenges are proposed and suggestions for future directions are provided to aid the development of this important research field. 展开更多
关键词 Ultraviolet detector Surface acoustic wave Sensitive material PIEZOELECTRIC
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