Benchmarking sensor fusion capabilities of an integrated instrumentation package. (December 2017)

• Record Type: Journal Article
• Authors: Cotter, Emma; Murphy, Paul; Polagye, Brian
• Is Part Of: International journal of marine energy. Volume 20(2017)
• Page Start: 64
• Page End: 79
• Publication Date: 2017-12
• Subjects: Environmental monitoring -- Instrumentation -- Target tracking -- Target classification; Ocean energy resources -- Periodicals; Marine resources -- Periodicals; 333.9164
• DOI: 10.1016/j.ijome.2017.09.003
• Languages: English
• ISSNs: 2214-1669

Abstract

Abstract: Quantifying and mitigating environmental risks presented by marine energy conversion systems requires a variety of sensors (active acoustic, passive acoustic, and optical). The operation of these sensors must satisfy three directives to be effective: (1) do not alter the environment through operation of sensors; (2) capture rare events; and (3) do not accrue unmanageable volumes of low-value data. This requires integrating sensors into a single package, rather than operating them independently. The Adaptable Monitoring Package is an integrated instrumentation package that combines a multibeam sonar, acoustic camera, current profiler, optical cameras, and an array of hydrophones. The capabilities and limitations of the AMP sensors were benchmarked using cooperative targets, and real-time target tracking and detection was used to detect opportunistic targets (e.g., diving birds, seals). During an initial deployment, automatic detection of opportunistic targets achieved a 58% true positive rate and a 99% true negative rate (100% corresponding to an ideal system in both cases). In post-processing, target tracking data were used to evaluate automatic target classification capabilities using a k-nearest neighbor algorithm. Results suggest that real-time target classification should be possible and enable integrated instrumentation systems to meet the monitoring needs of marine energy deployments.