Sökning: "ultraljud lab"

Hittade 2 uppsatser innehållade orden ultraljud lab.

  1. 1. Dispersion of cement-based grout with ultrasound and conventional laboratory dissolvers

    Master-uppsats, KTH/Byggvetenskap

    Författare :Antranik Karamanoukian; [2020]
    Nyckelord :ultrafine cement grout; microfine cement grout; dispersion; additives; ultrasound dissolver; laboratory dissolver; ultrafint cementbruk; mikrofin cementbruk; dispergering; tillsatser; ultraljud apparat; laboratorieblandaren;

    Sammanfattning : In any underground facilities especially tunnels, it is essential to seal the area against water ingress and leakage of reserved materials. Grouting is a common method used to seal rocks around tunnels, successful grouting reduces the duration and cost of the construction, guarantees better working environment and higher safety, minimizes the maintenance and most important decreases the corresponding environmental hazards significantly. LÄS MER

  3. 2. Optimering av ultraljudssändare- och mottagare avseende räckvidd, strålningsvinkel och energiförbrukning

    Uppsats för yrkesexamina på grundnivå, Umeå universitet/Institutionen för tillämpad fysik och elektronik

    Författare :David Tjällskog; [2014]
    Nyckelord :ultraljud; inomhus positioneringssystem; optimering;

    Sammanfattning : Embedded Systems Lab at Umeå University is currently part of a research project with the purpose to examine the behavior of dairy cows inside a barn. Each cow needs to be tracked with a precision of 50 cm, and since GPS-technique has poor functionality at indoor environments, an indoor positioning system needs to be developed. LÄS MER