Sökning: "Pär-Erik Martinsson"

Hittade 2 avhandlingar innehållade orden Pär-Erik Martinsson.

  1. 1. Characterization of energy gases by ultrasound theory and experiments

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Pär-Erik Martinsson; Luleå tekniska universitet.; [2004]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

    Sammanfattning : The long-term goal with the research presented in this thesis has been to develop an ultrasonic sensor capable of measuring the energy content of energy gases such as natural- and biogas. The energy content can be calculated if the concentration of each constituent of a gas mixture is known. LÄS MER

  2. 2. Improved modeling of ultrasonic systems : feasible for industrial applications

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Pär-Erik Martinsson; Luleå tekniska universitet.; [2002]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

    Sammanfattning : In this thesis tree aspects of ultrasonic measurement and modelling techniques have been investigated. Namely, transducer diffraction modelling using equivalent circuits, wave propagation in multi phase flow, and wave propagation in gases. The work is relevant both from an scientific point of view and from an engineering point of view. LÄS MER