Automatisk detektering av akustiska resonansfrekvenser i trästockar
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)
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.
Spectral analysis, resonance technique, timber quality
IdentifiersURN: urn:nbn:se:uu:diva-181499ISRN: UTH-INGUTB-EX-E-2012/15-SEOAI: oai:DiVA.org:uu-181499DiVA: diva2:556291
Bachelor Programme in Electrical Engineering
Wu, Ping, Forskare
Olofsson, Tomas, LektorMasszi, Nora, Universitetsadjunkt