Change search
ReferencesLink to record
Permanent link

Direct link
Automatisk detektering av akustiska resonansfrekvenser i trästockar
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Signals and Systems Group.
2012 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Real time spectral analysis for acoustic resonance technique used in timber quality classification (English)
Abstract [en]

In order to measure the quality of the logs, one can with help of Fast Fourier Transform technique get the signals resonance peaks. With help of these peaks you can see whether the quality of a tree is good or bad. This report contains the work of a where a program has been developed to be able to process a vibration created by an automatic hammer hitting on a log of wood. From the processed signal the program should be able to show both the raw wavesignal and the processed measured data from the resonance peaks. Beyond the raw wavesignal and resonance peaks the program should also be able to control the automatic hammer. The goal with the project is to have a program that get the same measure results as an already functioning measuring equipment. The result was a success when with the help of the program you were both able to control the hammer, measure the results and save the data with an accurate results.

Place, publisher, year, edition, pages
2012. , 21 p.
Keyword [en]
Spectral analysis, resonance technique, timber quality
National Category
Signal Processing
URN: urn:nbn:se:uu:diva-181499ISRN: UTH-INGUTB-EX-E-2012/15-SEOAI: diva2:556291
Educational program
Bachelor Programme in Electrical Engineering
Available from: 2012-09-27 Created: 2012-09-24 Last updated: 2012-09-27Bibliographically approved

Open Access in DiVA

fulltext(1433 kB)196 downloads
File information
File name FULLTEXT02.pdfFile size 1433 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Jonsson, David
By organisation
Signals and Systems Group
Signal Processing

Search outside of DiVA

GoogleGoogle Scholar
Total: 196 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 178 hits
ReferencesLink to record
Permanent link

Direct link