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Automatic sensor drift detection and correction using spatial kriging and kalman filtering

conference contribution
posted on 2013-01-01, 00:00 authored by D Kumar, Sutharshan RajasegararSutharshan Rajasegarar, M Palaniswami
Internet-of-Things (IoT) is a concept referring to interconnected people and objects and smart city is one of the many applications of IoT. Wireless Sensor Network (WSN) is a specific technology that helps to create 'Smart Cities'. It aims at creating a distributed network of intelligent sensor nodes which can measure various parameters for efficient management of the city. The data thus collected through a range of sensors is processed and is delivered wirelessly in real-time to the citizens or the appropriate authorities. Since the application framework for smart city application is huge, it would require a large number of different types of sensors for its implementation and the project could be viable only if we use low resolution, low precision but inexpensive sensors. The sensors in sensor network can suffer from random or systematic errors. Most common problem with inexpensive sensors used in WSNs for smart city applications is of drift and bias. They can be calibrated at the time of deployment, but they develop drift, which is the slow change in the reading of sensor from actual value as time progresses. In this paper we have proposed a framework to automatically detect and correct the drift of the sensor nodes to keep the WSN usable. Kriging based interpolation of the sensor readings of neighboring sensors is used to predict actual value at the sensor node and the measured drift is then kalman filtered to get correct drift estimates. We have demonstrated the results of this algorithm on real sensor data obtained from Intel Research Berkeley Laboratory deployment and shown that our system is able to detect and correct smooth drift and bias generated in the sensors. We have also shown that our system is robust with respect to the number of sensor nodes drifting and significantly outperforms the traditional averaging based interpolation methods.

History

Event

IEEE Computer Society. Conference (2013 : Cambridge, Massachusetts)

Series

IEEE Computer Society Conference

Pagination

183 - 190

Publisher

Institute of Electrical and Electronics Engineers

Location

Cambridge, Mass.

Place of publication

Piscataway, N.J.

Start date

2013-05-20

End date

2013-05-23

ISSN

2325-2936

eISSN

2325-2944

ISBN-13

978-1-4799-0206-4

Language

eng

Publication classification

E Conference publication; E1.1 Full written paper - refereed

Copyright notice

2013, IEEE

Editor/Contributor(s)

[Unknown]

Title of proceedings

DCoSS 2013 : Proceedings of the 2013 IEEE International Conference on Distributed Computing in Sensor Systems