Sökning: "multibeam echosounder"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden multibeam echosounder.

  1. 1. Multi-Resolution Inference of Bathymetry From Sidescan Sonar

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Zhengjie Ji; [2023]
    Nyckelord :;

    Sammanfattning : How to obtain complete and high-resolution bathymetry is an important research topic in the underwater domain. However, existing methods have certain shortcomings. Multibeam echosounder (MBES) can produce narrow beam range readings of the seafloor, but there is an interval between every two beams (between 10cm to 10m), and the resolution is low. LÄS MER

  3. 2. AUV SLAM constraint formation using side scan sonar

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Marco Schouten; [2022]
    Nyckelord :AUV; Side Scan Sonar; Pose Estimation; SLAM; Optimisation; AUV; Side Scan Sonar; Pose Estimation; SLAM; Optimisation;

    Sammanfattning : Autonomous underwater vehicle (AUV) navigation has been a challenging problem for a long time. Navigation is challenging due to the drift present in underwater environments and the lack of precise localisation systems such as GPS. Therefore, the uncertainty of the vehicle’s pose grows with the mission’s duration. LÄS MER

  4. 3. Submap Correspondences for Bathymetric SLAM Using Deep Neural Networks

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Jiarui Tan; [2022]
    Nyckelord :Underwater simultaneous localization and mapping; Multibeam echosounder; Point cloud registration; Deep learning; Undervattens simultan lokalisering och kartläggning; Multibeam ekolod; Punktmolnsregistrering; Djupinlärning;

    Sammanfattning : Underwater navigation is a key technology for exploring the oceans and exploiting their resources. For autonomous underwater vehicles (AUVs) to explore the marine environment efficiently and securely, underwater simultaneous localization and mapping (SLAM) systems are often indispensable due to the lack of the global positioning system (GPS). LÄS MER

  5. 4. Södra Mälarens innehållsrika backscatter : En studie av hur backscatterdata kan granskas, bottentypsklassificeras och utnyttjas med hjälp av GIS och statistiska metoder

    M1-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Robert Nord; [2016]
    Nyckelord :Backscatter; amplitude strength; multibeam system; multibeam echosounder; GIS; bottom hardness; bottom type classification; Backscatter; amplitud-styrka; multibeamsystem; multibeamekolod; GIS; bottenhårdhet; bottentypsklassificering;

    Sammanfattning : Sjöfartsverket har i sitt arkiv en stor mängd backscatterdata, insamlat med multibeamekolod, som ännu inte har använts till sin fulla potential. Backscatterdata innehåller information om den reflekterade signalens styrka, även kallad amplitud. Stora mängder backscatterdata kan användas för att beskriva den akustiska bottenreflektionen. LÄS MER

  7. 5. Glacial morphology and bathymetric mapping in Melville Bay, Western Greenland - Multibeam and backscatter mosaic

    Kandidat-uppsats, Stockholms universitet/Institutionen för geologiska vetenskaper

    Författare :Caroline Bringensparr; [2014]
    Nyckelord :;

    Sammanfattning : During the VEGA Expedition, in June 2013, reflectivity (backscatter) and depth data wasacquired with a multibeam echosounder from an approximately 140 km2 large area in MelvilleBay, off the coast of Western Greenland. One of the expedition objectives was to search for andmap evidences of a grounded ice sheet, which is likely to have reached the edge of the continentalshelf during the Last Glacial Maximum, about 20 000 years ago. LÄS MER