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Active Acoustic Technology For Biological Detection, Assessment, and Monitoring at MHK Sites

Active Acoustic Technology For Biological Detection, Assessment, and Monitoring at MHK Sites. Bob McClure BioSonics, Inc. 2-5 November, 2010. BioSonics Inc. Digital Scientific Echosounders. DT-X Echosounder. Scientific Split Beam Echosounder. Hydroacoustics. BioSonics Inc.

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Active Acoustic Technology For Biological Detection, Assessment, and Monitoring at MHK Sites

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  1. Active Acoustic Technology For Biological Detection, Assessment, and Monitoring at MHK Sites Bob McClure BioSonics, Inc. 2-5 November, 2010

  2. BioSonics Inc. Digital Scientific Echosounders DT-X Echosounder Scientific Split Beam Echosounder Hydroacoustics

  3. BioSonics Inc. Principals of Acoustics Electrical energy converted to sound Sound transmitted through water, focused on axis Sound is reflected by objects with different density than water Reflected energy is converted by transducer from mechanical to electrical Sound velocity used to convert time-based data into range-based data Echosounder receiver amplifies signal and provides quantitative output (display and raw acoustic data) Output Output Scientific Echosounder Voltage Transducer Time Sound Field Input

  4. Mobile Surveys Vertical Transducer Orientation

  5. Data Collection & Analysis Echogram Bulls eye display shows targets relative position within beam Oscilloscope

  6. Acoustic Cameras

  7. Traditional Fixed-Location Split Beam Acoustic Monitoring

  8. Roosevelt Island Tidal Energy (RITE) Project Cross section showing analysis grids Automated Analysis Biological Observations reported for each analysis grid Reports and Alerts Published in real-time

  9. Detection and Tracking of Marine Mammals Accurate detection and tracking of targets throughout the coverage range. Target classification, identification, possible based on acoustic and other sensor / knowledge. Range adequate for real-time data processing and reporting.

  10. Hydroacoustic Survey - SeaGen Project Strangford Lough, Ireland Transect path Turbine

  11. Hydroacoustic Survey - SeaGen Project Strangford Lough, Ireland Results: Excellent environment for detection and classification of marine organisms 25 m 400 m Echogram from 400 m transect traveling South to North

  12. Hydroacoustic System to Monitor Marine Mammal Interactions at Kinetic Hydro Power Project Site 400 m Profile view showing hydroacoustic coverage zone utilizing four-transducer system

  13. Concept of Operation Cross-section view of bi-directional monitoring system

  14. Monitoring Operation – Profile View Acoustic coverage area is a function of the number of transducers Quantify and monitor trajectory of all objects entering turbine field Understand how marine animals interact with the device Acoustic coverage area using 1, 2, or 3 transducers

  15. Monitoring Operation – Plan View 150 m

  16. Monitoring Operation – Rotators and Additional Sensors Dual axis mechanical rotators can be used to increase coverage “footprint” Imaging sonar device can be integrated for ground truth and refinement of split-beam classification engine

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