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

Offering the Widest Range of Hydroacoustic Solutions 2003-2010 Copyright BioSonics, Inc. All Rights Reserved

www.biosonicsinc.com

Active Acoustic TechnologyFor Biological Detection, Assessment, and Monitoring

at MHK Sites

Bob McClureBioSonics, Inc.

2-5 November, 2010



BioSonics Inc.Digital Scientific Echosounders

DT-X EchosounderScientific Split Beam Echosounder

Hydroacoustics



Transducer

Sound Field

Input

OutputScientific Echosounder

Electrical energy converted to soundSound transmitted through water, focused on axisSound is reflected by objects with different density than waterReflected energy is converted by transducer from mechanical to electricalSound velocity used to convert time-based data into range-based dataEchosounder receiver amplifies signal and provides quantitative output (display and raw acoustic data)

Time

Volta

ge

Output

BioSonics Inc.Principals of Acoustics



Mobile SurveysVertical Transducer Orientation



Echogram

Bulls eye display shows targets relative position within beam

Oscilloscope

Data Collection & Analysis



AcousticCameras



Traditional Fixed-Location Split Beam Acoustic Monitoring



Roosevelt Island Tidal Energy (RITE) Project

Cross section showing analysis grids

Automated Analysis Biological Observations reported for each analysis gridReports and Alerts Published in real-time



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.

Detection and Tracking of Marine Mammals



Turbine

Transect path

Hydroacoustic Survey - SeaGen ProjectStrangford Lough, Ireland



Echogram from 400 m transect traveling South to North

400 m

25 m

Results: Excellent environment for detection and classification of marine organisms

Hydroacoustic Survey - SeaGen ProjectStrangford Lough, Ireland



Hydroacoustic System to Monitor Marine Mammal Interactionsat Kinetic Hydro Power Project Site

Profile view showing hydroacoustic coverage zone utilizing four-transducer system400 m



Cross-section view of bi-directional monitoring systemConcept of Operation



Monitoring Operation – Profile ViewAcoustic 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



150 m

Monitoring Operation – Plan View



Monitoring Operation – Rotators and Additional SensorsDual 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



Documents

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