Search for dissertations about: "piezoelectric"

Showing result 6 - 10 of 126 swedish dissertations containing the word piezoelectric.

2. 6. Towards the production of conductive and piezoelectric bicomponent textile fibres

   Author : Erik Nilsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; polypropylene; Graphite nanoplatelets; bi-component fibres; rheology; conductive fibres; carbon black; PVDF; electrical conductivity; piezoelectric fibres; melt spinning;

   Abstract : In the present study electrical conductive and piezoelectric textile fibres have been manufactured and characterized. Potential applications of these fibres are for example textiles with heating and sensor properties. READ MORE

4. 7. Microfabrication and evaluation of piezoceramic actuators

   Author : Mats Bexell; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Miniature motor; piezomotor; piezoelectric; actuator; assembly; piezoceramic; Materialvetenskap; Materials science; Teknisk materialvetenskap; materialvetenskap; Materials Science;

   Abstract : There is an increasing interest for miniaturised actuators in a number of technological fields such as automation or medicine (e.g. prostheses, medical pumps etc.). READ MORE

5. 8. Detecting Inclusions in a Silicone Rubber Phantom Using Standing Lamb Waves and Multiple Frequency Footprints

   Author : Ulf G Jonsson; Britt Andersson; Olof A Lindahl; Jacques Ohayon; Umeå universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Piezoelectric; Silicone rubber; Impedance; Resonance; Lamb waves; Phantom; Electronics; elektronik;

   Abstract : The thesis deals with one major question: is it possible, using one piezoelectric sensor/vibrator, to detect a hard inclusion in a silicone rubber phantom? The question was approached with an open mind and the task was subdivided into three clearly identifiable parts: characterization of the piezoelectric sensor/vibrator (paper I), creating a model of the visco-elastic properties of a tissue-like material (phantom) in contact with the sensor/vibrator (paper II), and to detect the presence of a hard inclusion in the phantom (paper III). All vibrations of the sensor/vibrator and phantom was modeled using a finite element method (FEM). READ MORE

6. 9. Vibrational energy harvesting for sensors in vehicles

   Author : Johan Bjurström; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; piezoelectric; anti-resonance; electromagnetic induction; prescribed displacement; low frequency; nonlinear dynamics; small amplitude excitation; automotive safety; vibration energy harvesting; unified modeling;

   Abstract : The miniaturization of semiconductor technology and reduction in power requirements have begun to enable wireless self-sufficient devices, powered by ambient energy. To date the primary application lies in generating and transmitting sensory data. READ MORE

7. 10. Interfacing HPLC with MALDI- and ESI-MS for Automated High Sensitivity Analysis of Proteins and Peptides

   Author : Tasso Miliotis; Lund Institutionen för kliniska vetenskaper; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; automated; phosphorylation; ZAP-70; peptides; proteins; comprehensive; multidimensional; two-dimensional; piezoelectric; microdispenser; flow-through; ESI-MS MS; Capillary HPLC; MALDI-TOF MS; Analytical chemistry; Analytisk kemi;

   Abstract : The research described in this thesis has an interdisciplinary approach dealing with chemical, biological, and technical issues. One objective was to interface miniaturized liquid chromatography (LC) to mass spectrometry, i.e. MALDI-TOF MS and ESI-MS, in an unattended mode for high sensitivity determination of proteins and peptides. READ MORE