Sea Technology

FEB 2017

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Page 33 of 72 February 2017 / st 33 have four detection channels in an ultracompact seawater-resistant hous- ing (available in stainless steel and ti- tanium, depth rated for 300 or 6,000 m). In both versions, measurements are performed with all possible excitation- emission combinations, thus unfolding a matrix of fluorescence and backscat- tering signals. Power consumption is below 1.8 W at 12 to 24 VDC and weight is less than 600 g in air. When combining both sensors, e.g., using a compliant fitting for glider applica- tions, an unchallenged range across the UV-VIS electromagnetic spectrum is available. This allows observing not only established parameters but also previous unknown substances that may be encountered in multipurpose applications. Initial field application steps currently ongoing are the inte- gration into a Liquid Robotics Wave Glider platform and a mooring site both scheduled for deployment in the vicinity of the island of Gran Canaria, Spain. This will be used to demonstrate the system's ability to detect and quan- tify hydrocarbon pollutants associated with the intense ship traffic in the vi- cinity of the island's port and local sewage runoffs. MatrixFlu Data Management, Interfaces Matrix sensing obviously produces more data than single-channel fluo- rometers. Therefore onboard process- ing and storage capacities were in- cluded to make use of higher-level operations, such as characterizing sub- stances from multisensory information or performing data quality checking from redundant information. Onboard computational power additionally en- abled the easy integration of standard protocols such as MODBUS-RTU and OGC-PUCK on Ethernet, RS-232 and RS-485 interfaces. Sensor operation can be controlled either from outside via the above protocols or as a re- sponse to power up, a simple solution for less sophisticated platforms. Finally, cost-efficiency is achieved from factors such as integrating multiple sensors into one, supporting flexibility in the mission's target parameters, ease of in- tegration due to open standard proto- cols and enhanced data access based on embedding processing capacities and an open standard compliant soft- ware architecture. Conclusion The matrix fluorescence sensor is an example of multifunctional solu- tions dedicated to tackle the needs for cost-efficient data acquisition. It of- fers compactness, efficiency and ready interoperability as required by today's and tomorrow's operational marine observatories and monitoring efforts. It is noteworthy to mention that simi- lar innovations are occurring in other sensor and sensor system develop- ments within the Oceans of Tomor- row's group of projects. Thus, we and our colleagues are aiming to foster the next generation of operational sensor systems that keeps an eye on our blue planet. Acknowledgments The MatrixFlu development was re- alized and commercialized by TriOS (Germany). We are indebted to the colleagues of the Oceans of Tomorrow projects and to our international part- ners in the NeXOS project. This work received funding from the EU FP7 proj- ect NeXOS under grant agreement No. 614102. References For a list of references, please con- tact Jay Pearlman at jay.pearlman@ or Oliver Zielinski at oliver. ST Dr. Jay Pearlman is an adjunct professor at Uni- versity of Colorado and technical director of J&F Enterprise. His interests include ocean in-situ sen- sors, ocean observation systems and advanced approaches to observation information. He chairs the IEEE OES Environment and Observation Sys- tems Technology Committee and supports NeXOS through his work with IEEE France. Dr. Oliver Zielinski is a full professor at the Institute for Chemistry and Biology of the Marine Environ- ment (ICBM) of University Oldenburg (Germany). His research covers marine optics and marine phys- ics, with a special focus on coastal systems and sen- sors. Within NeXOS, he leads the work package on optical sensors. Iver3 Autonomous Underwater Vehicles Side Scan Bathy Water Quality Magnetometer +1 508-878-0550 Rapid Data Collection For Coastal Applications "The matrix fluorescence sensor is an example of mul- tifunctional solutions dedicated to tackle the needs for cost-efficient data acquisition."

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