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Program för frekvensanalys
Örebro University, School of Science and Technology.
2017 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Program for Frequency Analysis (English)
Abstract [sv]

Denna rapport täcker arbetsprocessen bakom att skapa en spektrumanalysator. Läsaren kommer att få läsa om den valda metoden men även alternativa metoder. Utöver detta kommer även de teoretiska delarna bakom varje moment att undersökas samt jämföras med potentiella alternativa lösningar.

Projektet har utförts på uppdrag av KA Automation. Syftet med projektet var att skapa en basplattform för analys av ljudfrekvenser. Målet med detta var att kunna identifiera ljudegenskaper i form av frekvenserna hos exempelvis servomotorer i vattenpumpar. Tanken var att i ett senare utvecklingsskede kunna identifiera om och när nya frekvenser dykt upp i ljudprofilen vilket i sådana fall kan resultera i att motorn är i behov av service. Basplattformen är uppbyggd med hjälp av C# och ljudbehandlingsbiblioteket NAudio.

Från resultatet kan slutsatsen dras att detta program kan analysera ljud och visa de olika frekvensernas styrka och därmed är en lämplig basplattform för vidareutveckling.

Abstract [en]

This report will cover the work process behind creating a spectrum analyzer. The reader will be able to read about the chosen method but also the alternative methods. Apart from this the theoretical parts behind every moment will also be covered and compared to potential alternative solutions.

The project has been carried out on behalf of KA Automation. The purpose of the project was to create a base for analyzing sound frequencies. The goal was to be able to identify sound properties in the form of frequencies in servo motors in for example water pumps. The idea was to be able to in a later development stage be able to identify when new frequencies have entered the audio profile which might result in the motor to be in need of service. The base is created with the help of C# and the sound library NAudio.

From the result one can conclude that this program can analyze sound and display the magnitude of its frequency components and is therefore a suitable base for future development.

Place, publisher, year, edition, pages
2017. , 25 p.
Keyword [en]
frequency, analyzer, analyze, spectrum, signal, processing, discrete, fourier, transform, fast, radix-2-fft, radix-2, cooley, tukey, window, function, magnitude, normalize, hamming, hann, hanning, complex, number, sampling, sample, sound, wave, microphone, rate, size, format, audio, byte
Keyword [sv]
frekvensanalys, spektrum, dsp, digital, signalbehandling, fouriertransform, dft, fft, cooley-tukey, fönsterfunktion, amplitud, decibel, normalisering, komplex, komplexa, tal, sampel, bit, ljud, våg, mikrofon, analys, samplingshastighet, samplingsstorlek, ljudformat, frekvenser, frekvens, spektra, analog
National Category
Computer Science
Identifiers
URN: urn:nbn:se:oru:diva-58157OAI: oai:DiVA.org:oru-58157DiVA: diva2:1113064
Subject / course
Computer Engineering
Presentation
2017-05-29, T101, Örebro universitet, Fakultetsgatan 1, 701 82, Örebro, 10:22 (Swedish)
Supervisors
Examiners
Available from: 2017-06-21 Created: 2017-06-21 Last updated: 2017-06-21Bibliographically approved

Open Access in DiVA

fulltext(1215 kB)13 downloads
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File name FULLTEXT01.pdfFile size 1215 kBChecksum SHA-512
98d7de4cf0a85eeb611b4c021706f067190cbf5075cc6cf9f14297d6fee80fe51c2d5139e55b6166766128cadc27619620ca6393c24bad4fca5c7fe289fd438c
Type fulltextMimetype application/pdf

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CiteExportLink to record
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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
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Output format
  • html
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  • asciidoc
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