Search for dissertations about: "Acoustic Sensor"

Showing result 16 - 20 of 46 swedish dissertations containing the words Acoustic Sensor.

  2. 16. Achieving reliable networking for the generic autonomous platform for sensor systems : (GAP4S)

    Author : Paolo Monti; Andrea Fumagalli; Marco Tacca; The University Of Texas At Dallas; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Networks of wireless integrated sensors are often used to monitorparameters distributed in the environment. These parameters arerelated to a variety of applications such as security, patientmonitoring, chemical and biological hazard detection. Some solutionsrely on replaceable batteries with a limited life-time to providelong-term sensor operation. READ MORE

  4. 17. Fault Diagnosis of Industrial Machines using Sensor Signals and Case-Based Reasoning

    Author : Erik Olsson; Peter Funk; Ashwin Ram; Mälardalens högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Computer science; Datavetenskap; Computer Science; Datavetenskap;

    Abstract : Industrial machines sometimes fail to operate as intended. Such failures can be more or less severe depending on the kind of machine and the circumstances of the failure. E.g. READ MORE

  5. 18. Thin Film Plate Acoustic Resonators for Frequency Control and Sensing Applications

    Author : Lilia Arapan; Ventsislav Yantchev; Ilja Katardjiev; Enrique Iborra; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electro-Acoustics; FPAR; Lamb waves; aluminium nitride; interdigital transducer; phase noise; temperature compensation; power handling; sensitivity; zero group velocity; intermode coupling; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics; Teknisk fysik med inriktning mot mikrosystemteknik; Engineering Science with specialization in Microsystems Technology;

    Abstract : The recent development of the commercially viable thin film electro-acoustic technology has triggered a growing interest in the research of plate guided wave or Lamb wave components owing to their unique characteristics. In the present thesis i) an experimental study of the thin film plate resonators (FPAR) performance operating on the lowest symmetrical Lamb wave (S0) propagating in highly textured AlN membranes versus a variety of design parameters has been performed. READ MORE

  6. 19. Direction of Arrival Estimation of Wideband Acoustic Wavefields in a Passive Sensing Environment

    Author : George Mathai; Fredrik Gustafsson; David Lindgren; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Direction Of Arrival (DOA) estimation has been an active research area for many decades because of its usefulness in many fields, such as wireless communication, navigation, astronomy, surveillance, medicine etc. In DOA estimation, emitted wavefields from unknown sources are measured with the aid of an array of sensors, and this information is then processed to determine various parameters of the sources including the angle between each source and the array. READ MORE

  7. 20. Molecular Adsorption on Self Assembled Monolayers studied by Surface Acoustic Waves and Infrared Spectroscopy

    Author : Lars Bertilsson; Antonio J. Ricco; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Chemical sensors based on the selective absorption of gas/vapors in polymer layers rely on molecular interactions. Details of the mechanisms involved can be obtained by studying the adsorption on well defined model organic surfaces. READ MORE