Sökning: "Sleeper"

Visar resultat 21 - 25 av 26 uppsatser innehållade ordet Sleeper.

  1. 21. ANALYSIS & STUDY OF AI TECHNIQUES FORAUTOMATIC CONDITION MONITORING OFRAILWAY TRACK INFRASTRUCTURE : Artificial Intelligence Techniques

    Master-uppsats, Datateknik

    Författare :Tanmay Podder; [2010]
    Nyckelord :Artificial intelligence; Non-destructive testing; Condition Monitoring; Machine Vision; Neural Network; Genetic Algorithm; Fuzzy Logic; Expert System.;

    Sammanfattning : Since the last decade the problem of surface inspection has been receiving great attention from the scientific community, the quality control and the maintenance of products are key points in several industrial applications.The railway associations spent much money to check the railway infrastructure. LÄS MER

  3. 22. Vibrations of partly supported concrete railway sleeper

    Master-uppsats, Hållfasthetslära

    Författare :Ehsan Rezaei; [2010]
    Nyckelord :;

    Sammanfattning : Analytical and finite element solutions to the problem of a vibrating beam on an elastic foundation are presented. An application example is a concrete railway sleeper embedded in an elastic medium (the ballast). The sleeper is also elastically connected to the rails. Eigenfrequencies are calculated and vibration modes are discussed. LÄS MER

  4. 23. MACHINE VISION FOR AUTOMATICVISUAL INSPECTION OF WOODENRAILWAY SLEEPERS USING UNSUPERVISED NEURAL NETWORKS

    Master-uppsats, Datateknik

    Författare :Mihira Manne; [2009]
    Nyckelord :Artificial intelligence; Non-destructive testing; Rail inspection; Rail transportation; Unsupervised learning; Data fusion;

    Sammanfattning : The motivation for this thesis work is the need for improving reliability of equipment and quality of service to railway passengers as well as a requirement for cost-effective and efficient condition maintenance management for rail transportation. This thesis work develops a fusion of various machine vision analysis methods to achieve high performance in automation of wooden rail track inspection. LÄS MER

  5. 24. Real time video segmentation for recognising paint marks on bad wooden railway sleepers

    Master-uppsats, Högskolan Dalarna/Datateknik

    Författare :Asif ur Rahman Shaik; [2008]
    Nyckelord :Condition Monitoring; Intelligent Vehicle; Videos; Color Segmentation; Spots objects ; Regions;

    Sammanfattning : Wooden railway sleeper inspections in Sweden are currently performed manually by a human operator; such inspections are based on visual analysis. Machine vision based approach has been done to emulate the visual abilities of human operator to enable automation of the process. LÄS MER

  7. 25. The Influence of Under Sleeper Pads on Railway Track Dynamics

    Magister-uppsats, Institutionen för ekonomisk och industriell utveckling

    Författare :Stephen Witt; [2008]
    Nyckelord :railway rack; track stiffness; under sleeper pad; finite element model; hanging sleeper;

    Sammanfattning : In this work the influence of Under Sleeper Pads on the dynamic forces on a railway track is investigated. A special interest is devoted to the effect of using Under Sleeper Pads in a railway track with changing vertical stiffness. The contact force between wheel and rail and the ballast contact forces are examined. LÄS MER