Jensen, Jørgen Arendt

Pihl, Michael Johannes

Rasmussen, Morten Fischer

Stuart, Matthias Bo

Tomov, Borislav Gueorguiev

The 3-D transverse oscillation method is investigated by estimating 3-D velocities in an experimental flowrigsystem. Measurements of the synthesized transverse oscillatingfields are presented as well. The method employs a 2-D transducer; decouples the velocity estimation; and estimates the axial, transverse, and elevation velocity components simultaneously. Data are acquired using a research ultrasound scanner. The velocity measurements are conducted with steady flow in sixteen different directions. For a specific flow direction with [α,β]= [45,15]°, the mean estimated velocity vector at the center of the vessel is (vx,vy,vz) = (33.8,34.5,15.2) ± (4.6,5.0,0.6)cm/s where the expected velocity is (34.2,34.2,13.0)cm/s. The velocity magnitude is 50.6 ± 5.2cm/s with a bias of 0.7cm/s.The flow angles α and β are estimated as 45.6 ± 4.9° and 17.6± 1.0°. Subsequently, the precision and accuracy are calculated over the entire velocity profiles. On average for all direction,the relative mean bias of the velocity magnitude is −0.08%. For α and β, the mean bias is −0.2° and −1.5°. The relative standard deviations of the velocity magnitude ranges from 8 to 16%. For the flow angles, the ranges of the mean angular deviations are 5° to 16° and 0.7° and 8°

Online Research Database In Technology

A Transverse Oscillation Approach for Estimation of Three-Dimensional Velocity Vectors, Part II: Experimental Validation

Michael Pihl

Matthias Stuart

Borislav Tomov

Morten Rasmussen

Jørgen Jensen

Crossref

IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control

A transverse oscillation approach for estimation of three-dimensional velocity vectors, Part II: experimental validation

http://orbit.dtu.dk/ws/files/100478547/t14a1608.pdf

A Transverse Oscillation Approach for Estimation of Three-Dimensional Velocity Vectors, Part II: Experimental Validation

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Online Research Database In Technology

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