Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Influence of length and sensor positioning on acoustic time-of-flight (ToF) measurement in structural timber.
Year:2017
Research Areas
  • Construction of engineering,
  • Civic works
Information
Abstract
The mechanical properties of timber can be estimated from wave propagation velocity by measuring wave time-of-flight (ToF). However, a time-lag complicates the measurements, which produces an apparent velocity dependency on length and this species and instrument dependent property is also influenced by knottiness. This research is dealing with time-lag determination by different sensor positioning in situ ToF measurements. ToF longitudinal measurements were conducted on 120 90 mm × 140 mm specimens of the coniferous species radiata pine, Scots pine, laricio pine and maritime pine. The following commercially available acoustic devices were used: Sylvatest Duo, USLab, and Microsecond Timer. The sensors were arranged for the measurement types ?end-to-end?, ?on the same surface? and ?on opposite surfaces?. ToF data were obtained from the full-length (4 m) specimens and then from the same specimens shortened to 3 m, 2 m and 1 m in length. The in situ procedures of ToF are applicable for a reliable length determination independently from the time-lag (tL) and velocity. The differences observed by end-to-end measurements, with respect to velocity, are below 4.4%. A velocity correction factor can be deduced for each instrument, which is independent of species.
International
Si
JCR
Si
Title
Holzforschung
ISBN
0018-3830
Impact factor JCR
1,868
Impact info
Volume
71
10.1515/hf-2016-0214
Journal number
9
From page
713
To page
723
Month
SEPTIEMBRE
Ranking
Participants
  • Autor: Francisco Arriaga Martitegui (UPM)
  • Autor: Daniel Fernandez Llana (UPM)
  • Autor: Miguel Esteban Herrero (UPM)
  • Autor: Guillermo Iñiguez Gonzalez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Construcción con Madera
  • Departamento: Ingeniería y Gestión Forestal y Ambiental
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
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