Sökning: "Multibeam ekolod"

Hittade 5 uppsatser innehållade orden Multibeam ekolod.

  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. Pixel correspondences for SLAM using sidescan sonar with canonical representations

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

    Författare :Weiqi Xu; [2022]
    Nyckelord :;

    Sammanfattning : Acoustic instruments play an important role in autonomous underwater vehicles (AUVs). Sidescan sonar (SSS) detects a wider range, provides photo-realistic images in high resolution, and has lower price than the multibeam echo sounder (MBES). 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. Acoustic-Inertial Forward-Scan Sonar Simultaneous Localization and Mapping

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

    Författare :Aldo Teran Espinoza; [2020]
    Nyckelord :;

    Sammanfattning : The increasing accessibility and versatility of forward-scan (FS) imaging sonars (also known as forward looking sonars or FLS) has spurred the interest of the robotics community seeking to solve the difficult problem of robotic perception in low-visibility underwater scenarios. Processing the incoming data from an imaging sonar is challenging, since it captures an acoustic 2D image of the 3D scene instead of providing straightforward range measurements like other sonar technologies do (e. 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