- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2018 IEEE Conference on Antenna Measurements & Applications (CAMA) - Va?ster?s (2018.9.3-2018.9.6)] 2018 IEEE Conference on Antenna Measurements & Applications (CAMA) - Design of Low-profile Antenna with Multi-directional Beam
摘要： An planar antenna having a low-pro?le structure using loop elements is proposed. The proposed antenna is vertically polarized and has four directional beams for sensor nodes. The thickness of the antenna is only 3.2 mm (0.11 effective wavelength) resulting in a low-pro?le structure. Simulated and measured average gain of 8.0 dBi and 5.6 dBi are obtained, respectively.
关键词： wireless sensor network,sensor node,low-pro?le antenna,vertical polarization,multi-directional beam
更新于2025-09-23 15:23:52
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Low power sensor node with photovoltaic power supply for radio-based process monitoring
摘要： This paper presents the idea of improving existing process monitoring systems for drilling, milling or threading by employing a novel communication technology as well as energy harvesting methods. An overview of the system including sensor node, energy supply and communication technology is given. The radio transmission methods are investigated in terms of power consumption in order to define requirements for the power supply. Fundamental measurements to characterize the behavior of different types of solar cells under artificial light are performed. Based on the results, two designs of sensor node prototypes are presented. The optical power supply and the energy harvesting system for the demonstrators are shown in detail.
关键词： optical power supply,process monitoring,24 GHz RFID,wireless sensor node,energy harvesting,RF communication
更新于2025-09-12 10:27:22
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[IEEE 2018 IEEE 23rd International Conference on Emerging Technologies and Factory Automation (ETFA) - Torino, Italy (2018.9.4-2018.9.7)] 2018 IEEE 23rd International Conference on Emerging Technologies and Factory Automation (ETFA) - An Energy Measurement System for Characterization of Energy Harvesting Systems
摘要： Energy neutral computing is seen as a design approach for wireless sensor nodes (WSN) which are powered by energy harvesters. The approach relies on keeping an equilibrium between consumption and harvesting of energy and typically uses models for energy prediction and management. To adapt models to specific systems and environments, often characterization measurements are used. Measurements strongly influence the model quality and with this the usability of such WSN. In this paper a novel measurement system (PiEMS) is presented that outperforms existing approaches and helps to optimize typical characterization tasks. The increased accuracy of characterization and modeling are exemplified for different WSN applications.
关键词： Wireless sensor node (WSN),Characterization,Energy harvesting,Energy neutral computing,Current measurement,Low power measurement,Energy measurement system
更新于2025-09-10 09:29:36
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[IEEE 2018 IEEE International Conference on RFID Technology & Application (RFID-TA) - Macau, Macao (2018.9.26-2018.9.28)] 2018 IEEE International Conference on RFID Technology & Application (RFID-TA) - RWC: A Robust Wireless Charging System for Dockless Bike-Sharing
摘要： Bike-sharing, especially dockless bike-sharing, making a sensational progress of public transportation recently. The implementation of smart locking/unlocking module for shared-bikes has produced the issue of how to charge those modules efficiently for shared-bikes. Existing shared-bike charging technologies rarely take charging delay or user experience into consideration. In this paper, we propose RWC, a robust wireless charging system for dockless bike-sharing, which can provide stable recharging service without decreasing bike-sharing system’s service quality. RWC recharges shared-bikes via radio frequency (RF) energy harvesting. We design an RF wireless charging sensor node to integrate it on a bike’s basket, such that the mutual interference during charging process and space occupation can be reduced. RWC also includes a charging direction scheduling algorithm to reduce charging delay. The RWC system has been successfully implemented on a dockless bike-sharing system, which proves its effectiveness.
关键词： wireless charging,RF energy harvesting,sensor node,charging delay,Bike-sharing
更新于2025-09-09 09:28:46
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[IEEE 2018 11th Global Symposium on Millimeter Waves (GSMM) - Boulder, CO, USA (2018.5.22-2018.5.24)] 2018 11th Global Symposium on Millimeter Waves (GSMM) - 57 GHz 130 uW CMOS Millimeter-Wave Oscillator for Ultra Low Power Sensor Node
摘要： Millimeter-wave sensor network will be conduce to very small and secure wireless tags. Conventional oscillator of millimeter-wave is mainly developed to reduce the phase noise and increase the tuning range and power consumption is larger than 1mW. The ultra-low power consumption oscillator, which has power consumption of less than 1mW, is needed to achieve millimeter-wave sensor network. In this paper, the design methodology is proposed for ultra-low power consumption oscillator. The fabricated IC performs 57.4GHz with 130μW power consumption. The FOM is 10dB higher than those of previously reported.
关键词： Sensor network,Sensor node,Low power consumption,Millimeter-wave oscillator
更新于2025-09-04 15:30:14