Demonstration of Biofouling Mitigation Methods for Long-Term Deployments of Optical Cameras
Abstract
Biofouling mitigation measures for optical ports can extend the duration of oceanographic deployments, but there have been few quantitative studies of field performance. Results are presented from a 4-month field test of a stereo-optical camera system intended for long-term environmental monitoring of tidal turbines. A combination of passive (copper rings and ClearSignal antifouling coating) and active (mechanical wipers) biofouling mitigation measures are implemented on the optical ports of the two cameras and four strobe illuminators. Biofouling on the optical ports is monitored qualitatively by periodic diver inspections and quantitatively by metrics describing the quality of the images captured by cameras with different antifouling treatments. During deployment, barnacles colonized almost every surface of the camera system, except the optical ports with fouling mitigation measures. The effectiveness of the biofouling mitigation measures suggests that 4-month deployment durations are possible, even during conditions that would otherwise lead to severe fouling and occlusion of optical ports.
Biofouling mitigation measures for optical ports can extend the duration of oceanographic deployments, but there have been few quantitative studies of field performance. Results are presented from a 4-month field test of a stereo-optical camera system intended for long-term environmental monitoring of tidal turbines. A combination of passive (copper rings and ClearSignal antifouling coating) and active (mechanical wipers) biofouling mitigation measures are implemented on the optical ports of the two cameras and four strobe illuminators. Biofouling on the optical ports is monitored qualitatively by periodic diver inspections and quantitatively by metrics describing the quality of the images captured by cameras with different antifouling treatments. During deployment, barnacles colonized almost every surface of the camera system, except the optical ports with fouling mitigation measures. The effectiveness of the biofouling mitigation measures suggests that 4-month deployment durations are possible, even during conditions that would otherwise lead to severe fouling and occlusion of optical ports.
Keywords: biofouling; environmental and remote monitoring; field testing; optical cameras
Document Type: Research Article
Publication date: 01 January 2015
- The Marine Technology Society Journal is the flagship publication of the Marine Technology Society. It publishes the highest caliber, peer-reviewed papers on subjects of interest to the society: marine technology, ocean science, marine policy and education. The Journal is dedicated to publishing timely special issues on emerging ocean community concerns while also showcasing general interest and student-authored works.
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