Everlast: long-life, supercapacitor-operated wireless sensor node

This paper describes a supercapacitor-operated, solar-powered wireless sensor node called Everlast. Unlike traditional wireless sensors that store energy in batteries, Everlast's use of supercapacitors enables the system to operate for an estimated lifetime of 20 years without any maintenance....

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Bibliographic Details
Main Authors: Simjee, Farhan, Chou, Pai H.
Format: Conference Proceeding
Language:English
Subjects:
Batteries
Computer systems organization > Embedded and cyber-physical systems
Computer systems organization > Real-time systems
Design
Frequency conversion
Frequency modulation
Life estimation
Lifetime estimation
long life
Management
Maximum power point tracking
Measurement
MPPT
Pulse modulation
Sensor phenomena and characterization
Sensor systems
solar power
supercapacitor
Supercapacitors
Wireless sensor networks
wireless sensors
WSN
Online Access:Request full text
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Summary:This paper describes a supercapacitor-operated, solar-powered wireless sensor node called Everlast. Unlike traditional wireless sensors that store energy in batteries, Everlast's use of supercapacitors enables the system to operate for an estimated lifetime of 20 years without any maintenance. The novelty of this system lies in the feedforward, PFM (pulse frequency modulated) converter and open-circuit solar voltage method for maximum power point tracking, enabling the solar cell to efficiently charge the supercapacitor and power the node. Experimental results show that Everlast can achieve low power consumption, long operational lifetime, and high transmission rates, something that traditional sensor nodes cannot achieve simultaneously and must trade-off.
DOI:10.1145/1165573.1165619