Tracking of Localized Sensor Node using Single-beam Echo Sounder

2020 ◽  
Author(s):  
Bhuvan Bhardwaj ◽  
Murugan Gopinath ◽  
Sanjay Kumar ◽  
Jinka Venkata Aravind ◽  
Shanthi Prince
Keyword(s):  
Sensor Node ◽  
Single Beam ◽  
Echo Sounder

ScourBuoy – concept for scour monitoring system

2021 ◽  
Author(s):  
Antonija Harasti ◽  
Gordon Gilja ◽  
Matej Varga ◽  
Robert Fliszar
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Functional System ◽  
Small Scale ◽  
Single Beam ◽  
Scour Monitoring ◽  
Inner Diameter ◽  
3D Positioning ◽  
Riprap Protection ◽  
Echo Sounder

<p>The objective of this paper is to present the ScourBuoy – concept for scour monitoring system. The ScourBuoy prototype is currently under development within the R3PEAT project (Remote Real-time Riprap Protection Erosion AssessmenT on large rivers), which aims to investigate scouring processes next to the riprap protection around bridge piers. ScourBuoy integrates commercially available technical devices into a functional system for scour monitoring during flood conditions. Sensors used are single beam echo sounder that collects depth and temperature data, multi-GNSS device for 3D positioning, compass for orientation respective to the True North and motion sensor for pitch and roll data. Combined output from the sensors allows user to calculate river depth and monitoring of scour development during floods. Advantage of ScourBuoy is adaptability to the field conditions, such as placement over the scour hole, as well as simpler deployment and reallocation in comparison to fix-mount solutions. ScourBuoy prototype was built using a common small-scale pipe float with an 80 mm inner diameter hole, which was used as a holder for an aluminium pipe. Aluminium pipe is used as a casing for echo sounder, positioned as downward-looking, so it stays submerged during deployment. The rest of the sensors are enclosed in the waterproof housing placed atop of the buoy, permanently above the waterline. The ScourBuoy will be a practical and affordable system which will allow researchers and engineers to collect measurements for scouring estimation. It will be used as a support system for rapid and timely decision making. Finally, developed Scour Buoy will present an alternative for real-time scour monitoring which allows responsive adapting to the specific conditions at the locations affected by scour.</p>

Multiswath multibeam echosounder for efficient seabed backscatter imaging and classification

2020 ◽  
Author(s):  
Didier Charlot ◽  
Philippe Alain ◽  
Geraldine Duffait ◽  
Olivier Lerda ◽  
Guillaume Matte
Keyword(s):  
Grazing Angle ◽  
Sidescan Sonar ◽  
Sediment Type ◽  
Ecosystem Research ◽  
Multibeam Echosounder ◽  
Single Beam ◽  
Angular Response ◽  
Seabed Classification ◽  
Sonar System ◽  
Echo Sounder

<p><strong>MULTISWATH MULTIBEAM ECHOSOUNDER FOR EFFICIENT SEABED BACKSCATTER IMAGING AND CLASSIFICATION</strong></p><ol><li><strong> Didier Charlot<sup>(1)</sup>,Philippe  Alain<sup>(1)</sup>, Géraldine Duffait<sup>(2)</sup> ,Olivier Lerda<sup>(2)</sup>, Guillaume Matte<sup>(2)</sup></strong></li> </ol><p> (1) iXBlue Sonar System Division, 256 rue Rivoalon, 29200 Brest,  France</p><p>(2) iXBlue Sonar System Division, 46 Quai F. Mitterrand, 13600 La Ciotat, France.</p><p> </p><p>               Managing marine resources and habitats require a classification system to identify and characterized seabed properties. Acoustic systems are recognized to be remote sensing tools that measure efficiently sediment properties and seabed morphology [1].Single beam, multibeam echosounder and sidescan sonar systems are commonly used to characterize seabed type by respectively analyzing echo strength returns, backscatter (BS) angular response, and texture analysis. Multibeam  (and interferometric sidescan ) systems  have the great advantage to measure the bottom bathymetry hence the true grazing angle at least in the across track direction. But there are still some challenges to face to get a robust calibrated BS value. </p><p>First, standard multibeam systems  do not measure directly the full BS backscatter angular response on each soundings. This can be accomplished by using a dual axis multibeam to record the BS in the along track direction[2]. The BS angular response is  a powerful metric to characterize the sediment type. </p><p>Second, the BS response is sensitive to the insonification direction (azimuth) and this dependency should also be considered to improve calibration procedure.  Recently, a full 3D steerable high resolution multibeam system has been developed [3]. First investigation ([3],[4]) have shown the high potential of multiswath multibeam system. With the 3D steerable swath capability, the bidirectional BS angular response can be recorded on each insonified soundings. This presentation will emphasize recent advances in processing using the  full multiswath multibeam capabilities.</p><p> </p><p>References:</p><p>[1] John T. Anderson, Editor,”Acoustic Seabed Classification of Marine Physical And biological Landscapes”, ICES Report N° 286, August 2007</p><p>[2]M.  Gutberlet and H. W. Schenke ,“HYDROSWEEP : New Era in High precision bathymetric Surveying in Deep and Shallow water” , Marine Geodesy,1989, Vol13,pp1-23</p><p>[3] F. Mosca & al., “Scientific potential of a new 3D multibeam echosounder in fisheries and ecosystem research”, Fisheries Research 178 pg. 130-141, 2016.</p><p>[4] Nguyen, Trung Kiên , Charlot D. , Boucher  J.-M , Le Chenadec G.,  Fablet R., “Seabed classification using a steerable multibeam echo sounder”. Oceans 2016 MTS/IEEE 2016,Monterey</p><p>[5] Nguyen, Trung Kiên, ”Seafloor classification with a multi-swath multi-beam echo sounder”, PhD thesis 2017, IMT Atlantique; http://www.theses.fr/2017IMTA0035</p>

Sign in / Sign up

Export Citation Format

Share Document