Sökning: "Piezoelectric Current"
Visar resultat 1 - 5 av 13 uppsatser innehållade orden Piezoelectric Current.
1. Inkjet printed piezoelectric energy harvesters based on self-assembly of diphenylalanine peptide
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : Diphenylalanine peptide (Phe-Phe or FF) is a very promising bio-material in the future wearable electronics application due to its self-assembly into nanotubes and nanoribbons with high shear piezoelectric coefficient which is comparable to traditional inorganic piezoelectric materials. In order to efficiently harvest piezoelectric response, alignment and unidirectional polarization of FF nanotubes are required. LÄS MER
2. Energy harvesting för sensorer i tung industriell miljö
Uppsats för yrkesexamina på grundnivå, Umeå universitet/Institutionen för tillämpad fysik och elektronikSammanfattning : Energy harvesting essentially involves extracting energy from processes that generate losses in theform of heat, vibrations, radiation, etc, and converting it into electrical energy that can be used topower sensors or other electrical systems. A customer of Knightec Örnsköldsvik wants to develop measurement equipment using sensors in a demanding industrial environment with rotating machines that does not allow wired energy or communication transfer. LÄS MER
3. Jet Printing Quality ImprovementThrough Anomaly Detection UsingMachine Learning
Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)Sammanfattning : This case study examined emitted sound and actuated piezoelectric current in a solderpaste jet printing machine to conclude whether quality degradation could be detected with an autoencoder machine learning model. An autoencoder was used to detect anomalies in non-realtime that were defined asa diameter drift with an averaging window from a target diameter. LÄS MER
4. Utveckling av minitransducer för endimensionell ultraljudsavbildning
Kandidat-uppsats, KTH/Medicinteknik och hälsosystemSammanfattning : Ultraljud är en användbar teknik för att utföra undersökningar i realtid samtidigt som det ej utsätter patienter för joniserad strålning. Det finns en potential för ultraljud att fylla ett gap på dagens marknad inom medicinsk avbildning då den kan tillämpas i mindre format. LÄS MER
5. Study of HfN as seed layer for next generation of BAW RF filters : synthesis, characterization, and investigation of piezoelectric performance
Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematikSammanfattning : Micro-electro-mechanical systems (MEMS) have become an essential component of a wide range ofelectronic devices over the last decades such as accelerometers, microphones, gas sensors, and filters.During this new millennium, a new radio frequency (RF) technology has been developed to satisfy thetough demands that arose due to the implementation of 5G wireless communication: bulk acoustic wave(BAW) filters. LÄS MER