Search for dissertations about: "acoustic sensors"

Showing result 1 - 5 of 38 swedish dissertations containing the words acoustic sensors.

  2. 1. Nanomechanical Phenomena in Low-Dimensional Structures

    Author : Anton Vikström; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; superconductivity; acoustic sensors; heat flow; NEMS; surface acoustic waves; solitons; viscoelasticity; electronic edge states;

    Abstract : This is a compilation thesis which investigates various mechanical phenomena in different low-dimensional nanoscale systems. In the first part, we consider a purely mechanical phenomenon: the sensitivity of the dispersion of a Love-type surface acoustic wave (SAW) to geometry and material parameters. READ MORE

  4. 2. Sensors and Algorithms in Industry 4.0 : Security and Health Preservation Applications

    Author : Dawid Gradolewski; Wlodek Kulesza; Sven Johansson; Alberto Rodriguez-Martinez; Blekinge Tekniska Högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Acoustic Sensor; Artificial Intelligence; Autonomisation; Classification; Detection; Feature Extraction; Health Preservation; Identification; Internet of Things; Machine Learning; Multi-Sensor System; Safety System; Vision System; Systemteknik; Systems Engineering;

    Abstract : Globalisation and technological digitisation have triggered an Industry 4.0. revolution.  The core of this revolution is autonomisation of complex processes, which require expert knowledge. READ MORE

  5. 3. Chemometric and signal processing methods for real time monitoring and modeling : applications in the pulp and paper industry

    Author : Anders Björk; Lars-Göran Danielsson; Guy Dumont; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Acoustic; Vibration; Multivariate; Chemometrics; PLS; OSC; PCA; FFT; Wavelets; WT-MRS; CWT-FLE; Pulp Quality; CSF; Brightness; Tensile Strength properties; Optical Properties; Measurement Technology; On-line; Non-invasive; Process Control; Process Analysis; Process Analytical Technology; PAT.; Akustik; Vibrationer; Multivariat; Kemometri; PLS; OSC; PCA; FFT; Wavelets; WT-MRS; CWT-FLE; Massakvalitet; CSF; Ljushet; Dragstyrkeegenskaper; Optiska egenskaper; Mätteknik; On-line; Icke berörande mätning; Processtyrning; Processanalys; Processanalytisk Teknologi; PAT.; Analytical chemistry; Analytisk kemi;

    Abstract : In the production of paper, the quality of the pulp is an important factor both for the productivity and for the final quality. Reliable real-time measurements of pulp quality are therefore needed. READ MORE

  6. 4. Wood and fibre mechanics related to the thermomechanical pulping process

    Author : Jan-Erik Berg; Per Engstrand; Per A. Gradin; Tomas Björkqvist; Mittuniversitetet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Acoustic emission; Chips; Compression tests; Defibration; Disc refiners; Energy consumption; Fibre structure; Force sensors; Fracture; Impact strength; Mathematical analysis; Moisture content; Picea abies; Refining; Stiffness degradation; Strains; Temperature; Thermomechanical pulping; Velocity; Chemical engineering; Kemiteknik;

    Abstract : The main objective of this thesis was to improve the understanding of some aspects on wood and fibre mechanics related to conditions in the thermomechanical pulping process. Another objective was to measure the power distribution between the rotating plates in a refiner. READ MORE

  7. 5. Combustion Sensing Methods - in Theory and Practice

    Author : Martin Larsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Internal combustion engines; HCCI; combustion measurements; measurement techniques; SI; signal processing; pressure sensors; ion current sensors;

    Abstract : Accurate, reliable sensors are essential parts of any control system, and there are increasing needs for feedback systems to monitor and control key parameters of automotive internal combustion engines, operating in various combustion modes and configurations, to reduce fuel consumption and engine-out emissions. Thus, there are strong motives for studying combustion sensors. READ MORE