Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Time lag determination on ultrasound wave measurement using different sensors positioning
Year:2016
Research Areas
  • Engineering,
  • Civil engineering and architecture,
  • Construction of engineering
Information
Abstract
Mechanical properties of timber can be estimated from wave propagation velocity by measuring the wave time of flight. A time lag is observed in wave time of flight depending on the species-knottiness and device, usually obtained by end to end measurements at different distances. The aim of this research is the determination of that time lag by means of in situ time of flight measurements. Ultrasound wave transmission time was measured in 30 pieces of Spanish Scots pine (Pinus sylvestris L.), 90 by 140 mm cross-section size and 4 m long. Different sensor placement arrangements were used: direct measurement (end to end), surface measurement (edge to same edge and face to same face) and crossed measurements (edge to opposite edge and face to opposite face). The pieces were successively shortened to 3, 2 and 1 m, establishing a linear regression between measuring distance and time of flight obtaining the time lag. Surface and crossed measurements were compared with direct measurement, in order to validate the time lag procedure.
International
Si
Congress
World Conference on Timber Engineering
960
Place
Vienna, Austria
Reviewers
No
ISBN/ISSN
978-3-903039-00-1
Start Date
22/08/2016
End Date
25/08/2016
From page
951
To page
958
Proceedings of the World Conference on Timber Engineering, WCTE 2016
Participants
  • Autor: Francisco Arriaga Martitegui (UPM)
  • Autor: Daniel Fernandez Llana (UPM)
  • Autor: Miguel Esteban Herrero (UPM)
  • Autor: Guillermo Iñiguez Gonzalez (UPM)
  • Autor: José Ramón Aira Zunzunegui (Univ. de Soria)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Construcción con Madera
  • Departamento: Ingeniería y Gestión Forestal y Ambiental
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