Detecting Local Scour Using Contact Image Sensors
Publication: Journal of Hydraulic Engineering
Volume 143, Issue 4
Abstract
The paper presents a novel contact image sensor (CIS) to monitor the local scour process around a model pile in water flows. The CIS is an optical sensor that tracks the evolution of the interface between sand and water based on the difference in the refelectivity of light from different media. A number of sensitivity tests are reported. It was found that the sensor reading is insensitive to the temperature in the range of 2–30°C and can provide reliable and continuous high accuracy measurements if suspended sediment concentration is lower than without needing precalibrations. Furthermore, the sensor was found to successfully detect local scour development around a vertical pile under steady current and tidal current. The CIS sensors have the potential to be applied to field monitoring of local scour around subsea infrastructure.
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Acknowledgments
The authors would like to acknowledge the support from the Australia Research Council through Australian Research Council (ARC) Discovery Projects (DP130104535, DE150100428, and DP150104644) and the Open Fund provided by the State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology. The authors would also like to thank the reviewers for constructive comments and suggestions.
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Information & Authors
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Published In
Journal of Hydraulic Engineering
Volume 143 • Issue 4 • April 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Mar 24, 2016
Accepted: Aug 24, 2016
Published online: Nov 16, 2016
Published in print: Apr 1, 2017
Discussion open until: Apr 16, 2017
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