Sökning: "Acoustic Emission"

Visar resultat 11 - 15 av 35 uppsatser innehållade orden Acoustic Emission.

  1. 11. High Temperature Tribology in Hot Stamping

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Evan Kurnia; [2019]
    Nyckelord :high temperature tribology; hot stamping; acoustic emission; condition monitoring; hardfacing;

    Sammanfattning : Many automotive components are made of Al-Si coated ultra-high strength boron steel (UHSS) and are produced by hot stamping process. In this process, the workpiece is heated to an austenitizing temperature and is then formed and quenched simultaneously between the tools to achieve the desired shape and high strength. LÄS MER

  3. 12. A Linear, Wide-band, Low-Power Receiver for Narrowband- Internet of Things (NB-IoT)

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Rohan Raghunath; Ghanashyam Ravindranath Prabhu; [2018]
    Nyckelord :NB-IoT; FTNC; Harmonic rejection; N-path filtering; RX Front End; Low power; Wide-band; Passive mixer; Current mode; Technology and Engineering;

    Sammanfattning : Advancement of technology with the aid of new application, wireless communication has grown rapidly in the past two decades. Recently, in the wireless communication industry, Narrowband- Internet of Things (NB-IoT) is being discussed by everyone, as the most important emerging technology of the day. LÄS MER

  4. 13. Hertz contact influence on acoustic emission signals originating in radial bearings : Test rig construction and experimental evaluation

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Joel Klippås; [2018]
    Nyckelord :Hertz contact; Acoustic emission; Radial bearings;

    Sammanfattning : During the project a test rig was constructed in which experiments were performed on radial bearings to evaluate the acoustic emission amplitude and RMS value of the signal. The acoustic emission amplitude depends on the Hertz contact time, i.e. the time it takes for the Hertz contact to roll over its own contact length. LÄS MER

  5. 14. Jämförelse av metoder för mätning av metangasutsläpp från vattenreservoarer

    Kandidat-uppsats, Lunds universitet/Miljövetenskaplig utbildning

    Författare :Jesper Andersson; [2017]
    Nyckelord :vattenreservoarer; metan; metoder; reservoirs; methane; emissions; methods; Earth and Environmental Sciences;

    Sammanfattning : Hydropower is developing fast across the globe to accommodate the increasing need for electric energy. It is generally considered to be a close-to-zero emission source of energy, but studies have shown that reservoirs and dams have a substantial emission of greenhouse gas, especially methane. LÄS MER

  7. 15. ThermoacousticInstabilities in a Gas Turbine Combustor

    Master-uppsats, KTH/MWL Marcus Wallenberg Laboratoriet

    Författare :Karl Bengtsson; [2017]
    Nyckelord :;

    Sammanfattning : Stationary gas turbines are widely used today for power generation and mechanical drive applications. The introduction of new regulations on emissions in the last decades have led to extensive development and new technologies used within modern gas turbines. LÄS MER