Sökning: "Johan Carlson"

Visar resultat 16 - 18 av 18 avhandlingar innehållade orden Johan Carlson.

1. 16. Computed tomography of sawlogs : knot detection and sawing optimization

   Författare :Erik Johansson; Johan Carlson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Träteknik; Wood Technology;

   Sammanfattning : Branches on trees introduce defects on sawn timber called knots. By scanning sawlogs using computed tomography, knots can be detected and accounted for so that the sawing process can be optimized with respect to outgoing product value. LÄS MER

3. 17. Blind Adaptive Extraction of Impulsive Signatures from Sound and Vibration Signals

   Författare :Aziz Kubilay Ovacikli; Johan Carlson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

   Sammanfattning : The two questions in science ``why" and ``how" are hereby answered in the context of statistical signal processing applied to vibration analysis and ultrasonic testing for fault detection and characterization in critical materials such as rolling bearings and thin layered media. Both materials are of interest in industrial processes. LÄS MER

4. 18. Non-destructive assessment of additively manufactured objects using ultrasound

   Författare :Shafaq Zia; Johan E. Carlson; Erik Vanhatalo; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

   Sammanfattning : Additive manufacturing (AM) enables the manufacturing of complex and tailored products for an unlimited number of applications such as aerospace, healthcare, etc. The technology has received a lot of attention in lightweight applications where it is associated with new design possibilities but also reduced material costs, material waste, and energy consumption. LÄS MER