Holistic online energy assessment: Feasibility and practical application

Publikationstyp
Conference Paper
Date Issued
2012-06
Sprache
English
Author(s)
Renner, Bernd-Christian  
Kauer, Florian  orcid-logo
Turau, Volker  
Institut
Telematik E-17  
TORE-URI
http://hdl.handle.net/11420/13091
Article Number
6240526
Citation
9th International Conference on Networked Sensing Systems (INSS 2012)
Contribution to Conference
9th International Conference on Networked Sensing Systems, INSS 2012  
Publisher DOI
10.1109/inss.2012.6240526
Scopus ID
2-s2.0-84865017893
Combining energy harvesting with energy-aware scheduling enables perpetually operating sensor networks. The practical realization of this goal yet requires reliable and precise holistic online energy assessment. While the building blocks - assessing residual energy, predicting energy intake, and tracing energy consumption - have been studied in detail, the analysis of their interaction on a real platform has been neglected. This paper answers the question, whether these techniques can be easily joined to give a precise and correct picture of a sensor node's energetic state and behavior. For this purpose, we model the energy flow of a prototype energy-harvesting sensor node and evaluate the joint performance of state-of-the-art energy assessment based on a field test. We verify the system model and show the feasibility of holistic energy assessment, which tolerates small configuration errors, achievable with a combination of generic configuration and online calibration. We also analyze the feasibility of forecasting a node's future energetic state, and find that the presented method gives sufficient results for uniformly distributed consumption profiles.
Subjects
Energy harvesting
Energy management
Energy measurement
Solar energy
Supercapacitors