Sökning: "Solder"

Visar resultat 1 - 5 av 42 uppsatser innehållade ordet Solder.

1. 1. Improving jet printing quality for printed circuit boards : Optimizing first dot jetting deposition through experimental design and response surface methodology

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för ekonomi, teknik, konst och samhälle

   Författare :William Hedlund; Gustav Sjöberg; [2023]
   Nyckelord :PCB; printed circuit board; piezo-actuation profile; quality; My700; solder paste; jet printer; jet printing; experimental design; experimental approach; waveform;

   Sammanfattning : Printed circuit boards (PCBs) are essential components in various electronic devices, playing a vital role in their functionality. Over time, PCBs have evolved significantly, becoming smaller, more complex, and multi-layered to meet the demands of advancing technology and consumer preferences. LÄS MER

3. 2. Prognostics for Condition Based Maintenance of Electrical Control Units Using On-Board Sensors and Machine Learning

   Master-uppsats, Linköpings universitet/Fordonssystem

   Författare :Gabriel Fredriksson; [2022]
   Nyckelord :machine learning; random forest; random survival forest; condition based maintenance; cbm; reliability; solder joint failure; thermomechanical cycling; ECU; lifetime prediction; data-driven; statistics; BGA; PCBA; field quality; maintenance; truck; bus; vehicle;

   Sammanfattning : In this thesis it has been studied how operational and workshop data can be used to improve the handling of field quality (FQ) issues for electronic units. This was done by analysing how failure rates can be predicted, how failure mechanisms can be detected and how data-based lifetime models could be developed. LÄS MER

4. 3. Electroless Copper Plating to Achieve Solderless Connections

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Författare :Martin Noren; [2021]
   Nyckelord :electroless copper plating; solderless connections; non-solder; solderless; solder free;

   Sammanfattning : As the world has woken up to the change in climate in recent years, people's environmental concerns are forcing companies to change and find ways to manufacture products without harming nature. One area of serious concern is the electronics industries where an ever-increasing number of products gets updated with sensors and microcomputers to be part of the internet of things. LÄS MER

5. 4. Tyngdkraft - Yngre elevers förståelse och uppfattning : En studie som undersöker yngre elevers uppfattning om tyngdkraft i samtal och genom grafisk representation med pilar

   Uppsats för yrkesexamina på avancerad nivå, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

   Författare :Susanne Sundin; Eleonore Juhnell; [2021]
   Nyckelord :Conceptual understanding; Conversation; Gravity; Laboratory teaching; Physics.; Begreppsförståelse; fysik; laborativ undervisning; samtal; tyngdkraft.;

   Sammanfattning : In this essay, we have investigated how students in year 2 of primary school understand, perceive and think about the phenomenon of gravity. We have used semi-structured interviews, individually and in pairs, and let the students make their thoughts visible with graphic representation in the form of drawn arrows before and after a practical activity. LÄS MER

7. 5. Jet Printing Quality ImprovementThrough Anomaly Detection UsingMachine Learning

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Henrik Lind; Jacob Janssen; [2021]
   Nyckelord :Jet Printing; Autoencoder; Anomaly Detection; Sound; Acoustic; Machine Learning; Solder Paste; Piezoelectric Current; Self Sensing;

   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