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ACES -- Automatic Configuration of Energy Harvesting Sensors with Reinforcement Learning
Internet of Things forms the backbone of modern building applications. W...
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Long range battery-less PV-powered RFID tag sensors
Communication range in passive Radio-Frequency Identification (RFID) fro...
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Demo Abstract: Pible: Battery-Free Mote for Perpetual Indoor BLE Applications
As of today, large-scale wireless sensor networks are adopted for smart ...
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Pible: Battery-Free Mote for Perpetual Indoor BLE Applications
Smart building applications require a large-scale deployment of sensors ...
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EHAAS: Energy Harvesters As A Sensor for Place Recognition on Wearables
A wearable based long-term lifelogging system is desirable for the purpo...
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Occupancy Estimation Using Low-Cost Wi-Fi Sniffers
Real-time measurements on the occupancy status of indoor and outdoor spa...
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Human-centric light sensing and estimation from RGBD images: The invisible light switch
Lighting design in indoor environments is of primary importance for at l...
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Self-powered sensors enabled by wide-bandgap perovskite indoor photovoltaic cells
We present a new approach to ubiquitous sensing for indoor applications, using high-efficiency and low-cost indoor perovksite photovoltaic cells as external power sources for backscatter sensors. We demonstrate wide-bandgap perovskite photovoltaic cells for indoor light energy harvesting with the 1.63eV and 1.84 eV devices demonstrate efficiencies of 21 respectively under indoor compact fluorescent lighting, with a champion open-circuit voltage of 0.95 V in a 1.84 eV cell under a light intensity of 0.16 mW/cm2. Subsequently, we demonstrate a wireless temperature sensor self-powered by a perovskite indoor light-harvesting module. We connect three perovskite photovoltaic cells in series to create a module that produces 14.5 uW output power under 0.16 mW/cm2 of compact fluorescent illumination with an efficiency of 13.2 battery-assisted RFID temperature sensor and demonstrate a read range by of 5.1 meters while maintaining very high frequency measurements every 1.24 seconds. Our combined indoor perovskite photovoltaic modules and backscatter radio-frequency sensors are further discussed as a route to ubiquitous sensing in buildings given their potential to be manufactured in an integrated manner at very low-cost, their lack of a need for battery replacement and the high frequency data collection possible.
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