CATEGORY: SENSORS
International Journal of Distributed Sensor
NetworksVolume 2013 (2013), Article ID 383168, 17 pages, http://dx.doi.org/10.1155/2013/383168
Wireless
Sensor Network Modeling and Deployment Challenges in Oil and Gas Refinery
Plants
Stefano Savazzi, 1 Sergio
Guardiano, 2 and Umberto Spagnolini 3
1 National Research Council (CNR), IEIIT Institute, 20133 Milano, Italy
2 Saipem S.p.A. (ENI Group), San Donato, Italy
3 DEIB, Politecnico di Milano, 20133 Milano, Italy
Abstract
Wireless sensor networks for critical industrial applications are becoming a
remarkable technological paradigm. Large-scale adoption of the wireless
connectivity in the field of industrial monitoring and process control is
mandatorily paired with the development of tools for the prediction of the
wireless link quality to mimic network planning procedures similar to
conventional wired systems. In industrial sites, the radio signals are prone to
blockage due to dense metallic structures. The layout of scattering objects
from the existing infrastructure influences the received signal strength
observed over the link and thus the quality of service (QoS).
This
paper surveys the most promising wireless technologies for industrial
monitoring and control and proposes a novel channel model specifically tailored
to predict the quality of the radio signals in environments affected by highly
dense metallic building blockage. The propagation model is based on the
diffraction theory, and it makes use of the 3D model of the plant to classify
the links based on the number and density of the obstructions surrounding each
individual radio device.
Accurate link classification opens the way to the optimization of
the network deployment to guarantee full end-to-end connectivity with minimal
on-site redesign. The link-quality prediction method based on the
classification of propagation conditions is validated by experimental
measurements in two oil refinery sites using industry standard ISA SP100.11a
compliant devices operating at 2.4 GHz.
Free Full Text Source: http://www.hindawi.com/journals/ijdsn/2013/383168/abs/
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