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Time series monitoring and prediction of data deviations in a manufacturing industry
Linnaeus University, Faculty of Technology, Department of computer science and media technology (CM).
2020 (English)Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

An automated manufacturing industry makes use of many interacting moving parts and sensors. Data from these sensors generate complex multidimensional data in the production environment. This data is difficult to interpret and also difficult to find patterns in. This project provides tools to get a deeper understanding of Swedsafe’s production data, a company involved in an automated manufacturing business. The project is based on and will show the potential of the multidimensional production data. The project mainly consists of predicting deviations from predefined threshold values in Swedsafe’s production data. Machine learning is a good method of finding relationships in complex datasets. Supervised machine learning classification is used to predict deviation from threshold values in the data. An investigation is conducted to identify the classifier that performs best on Swedsafe's production data. The technique sliding window is used for managing time series data, which is used in this project. Apart from predicting deviations, this project also includes an implementation of live graphs to easily get an overview of the production data. A steady production with stable process values is important. So being able to monitor and predict events in the production environment can provide the same benefit for other manufacturing companies and is therefore suitable not only for Swedsafe. The best performing machine learning classifier tested in this project was the Random Forest classifier. The Multilayer Perceptron did not perform well on Swedsafe’s data, but further investigation in recurrent neural networks using LSTM neurons would be recommended. During the projekt a web based application displaying the sensor data in live graphs is also developed.

Place, publisher, year, edition, pages
2020. , p. 45
Keywords [en]
Machine learning, Supervised learning, Time series classification, Manufacturing industry, Production data, Data deviations, Support Vector Machine, K-Nearest Neighbours, Linear Regression, Decision Tree, Random Forest, Neural Network, Recurrent Neural Network, Computer Science
Keywords [sv]
Maskininlärning, Tidsserier, Tillverkningsindustri, Klassificerare, Avvikelser
National Category
Computer Sciences Mathematical Analysis
Identifiers
URN: urn:nbn:se:lnu:diva-100181OAI: oai:DiVA.org:lnu-100181DiVA, id: diva2:1519431
External cooperation
Swedsafe
Subject / course
Computer Engineering
Educational program
Computer Engineering Programme, 180 credits
Supervisors
Examiners
Available from: 2021-01-19 Created: 2021-01-18 Last updated: 2021-01-19Bibliographically approved

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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf