Results 11 to 20 of about 29,054 (216)
APL Photonics, 2023 Laser Doppler velocimetry has developed as a powerful enabling technology within a myriad of realistic scenarios. While existing toolkits that exploit optical vortex allow access to longitudinal linear velocimetry and/or transverse rotational velocimetry
Yanxiang Zhang +3 more
doaj +1 more source
Quasi-continuous time-stretched photon Doppler velocimetry
Frontiers in Physics, 2022 In transient high-speed scenes such as chemical explosions, magnetic compression, electric explosion, and laser-driven flyer, the target object can accelerate from 0 to tens of km/s in a few nanoseconds. The time-stretched photon Doppler velocimetry uses
Linjie Lv +8 more
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Thermographic laser Doppler velocimetry [PDF]
Optics Letters, 2015 We propose a point measurement technique for simultaneous gas temperature and velocity measurement based on thermographic phosphor particles dispersed in the fluid. The flow velocity is determined from the frequency of light scattered by BaMgAl10O17:Eu2+ phosphor particles traversing the fringes like in conventional laser Doppler velocimetry.
Ojo, Anthony O. +4 more
openaire +5 more sources
Dianxin kexue, 2021 An optimized velocimetric model based on non-differential Doppler observations from BDS-3 satellites with high accuracy and low model complexity was proposed to address insufficient accuracy and low efficiency of velocity estimation method.The ...
Zejie WANG, Qianxin WANG, Tianwen SHANG
doaj +2 more sources
Doppler velocimetry in fetal rats exposed to enoxaparin and unfractionated heparin (UFH) during pregnancy [PDF]
Acta Cirúrgica Brasileira, 2017 Purpose: To evaluate the effects of enoxaparin and unfractionated heparin (UFH) administered in prophylactic and therapeutic doses on fetal vessels in healthy pregnant Wistar rats, according to Doppler velocimetry measurements.
Flavio Renato de Almeida Senefonte +4 more
doaj +1 more source
Remote Sensing, 2022 Surface velocity is traditionally measured with in situ techniques such as velocity probes (in shallow rivers) or Acoustic Doppler Current Profilers (in deeper water). In the last years, researchers have developed remote sensing techniques, both optical (
Filippo Bandini +5 more
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Single camera 3D planar Doppler velocity measurements, using two frequency planar Doppler velocimetry (2v-PDV) and imaging fibre bundles [PDF]
, 2006 A modified Planar Doppler Velocimetry (PDV) technique, two frequency PDV (2v-PDV), is described that allows measurements of the velocity field over a plane defined by a laser light sheet using sequential illumination of the flow with two closely ...
Charrett, Thomas O. H. +2 more
core +1 more source
Frequency division multiplexing for interferometric planar Doppler velocimetry [PDF]
, 2014 A new method of acquiring simultaneously the signal and reference channels used for interferometric planar Doppler velocimetry is proposed and demonstrated.
Bledowski, Ian A. +3 more
core +1 more source
Rotational Doppler Velocimetry of a Surface at Larger Tilt Angles
Photonics, 2023 Here, we experimentally demonstrate a straightforward-to-implement scheme that enables the rotating velocimetry of a noncooperative target at large deflection angles.
Yanxiang Zhang +3 more
doaj +1 more source
Single camera 3D planar Doppler velocity measurements using imaging fibre bundles [PDF]
, 2006 Two frequency planar Doppler Velocimetry (2ν-PDV) is a modification of the Planar Doppler Velocimetry (PDV) method that allows velocity measurements to be made, quickly and non intrusively, across a plane defined by a laser light sheet.
Charrett, Thomas O. H. +2 more
core +1 more source