Time-of-flight measurement is a critical step to perform ultrasonic non-destructive testing of
standing trees, with direct influence on the precision of defect detection. Aiming to increase …

Ultrasonic nondestructive imaging methods allow analyzing the inner structures of trees,
without altering their condition. In this study, we are interested in evaluating the influence of …

The aim of this study is to assess wood quality of standing trees with ultrasonic velocity
methods. The ultrasonic techniques currently used are: scattering based techniques that use …

Abstract Time-of-flight (ToF) measurements were conducted on twelve 76× 226-mm2 in
cross-section, 4.52-m long specimens of Norway spruce timber pieces from a dismantled …

Ultrasonic sensors are often used to adjust spray volume by allowing the calculation of the
crown volume of tree crops. The special conditions of the olive tree require the use of long …

Both laboratory and field ultrasonic measurements were carried out to assess the feasibility
of ultrasonic tomography for non-invasive testing of living trees. Trees with internal decay …

Acoustic tomography is an emerging nondestructive testing (NDT) technology for tree decay
detection in both urban community and production forest. Many field studies have been …

Ultrasound computed tomography (USCT) using the transmission mode is a way to detect
and assess the extent of decay in wood structures. The resolution of the ultrasonic image is …

In this work the problem of measuring density and verifying structural integrity of wooden
samples is approached by using non-contact ultrasonic transducers. The time of flight of the …

The effect of timber length on time-of-flight acoustic longitudinal measurements was
investigated on the structural timber of four Spanish species: radiata pine (Pinus radiata D …