Results 1 to 10 of about 109,351 (164)
Sensors, 2023 An integrated interferometric fiber optic velocimetry sensor has been proposed and demonstrated at the central wavelength of 638 nm. The sensor is based on the principle of two laser-beams’ interference.
Ran Song +11 more
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AIP Advances, 2021 High-speed measurements, particularly close to the velocity of light, have always been a great challenge in the field of experimental measurement. Although traditional high-speed measurement methods based on imaging technology can achieve millions of ...
Cunhong Wang, Cong Liu, Xingyi Zhang
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Speed Measurement in an Accomoving Reference System
East European Journal of Physics, 2020 A method of direct measurement of the observer's velocity (peculiar velocity) relative to the accompanying reference system is proposed and investigated. To measure peculiar velocity, it is proposed to use the measurement of stellar light aberration.
Volodymyr М. Svishch
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Laser Velocimetry for the In Situ Sensing of Deep-Sea Hydrothermal Flow Velocity
Sensors, 2023 Laser Doppler velocimetry (LDV) based on a differential laser Doppler system has been widely used in fluid mechanics to measure particle velocity. However, the two outgoing lights must intersect strictly at the measurement position.
Jingjing Sun +6 more
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Measurements of the Velocity of Light [PDF]
Nature, 1939 THE decrease of velocity of light deduced from the red-shifts is of the order of 1 km./sec. in 6,000 years, or 1 in 600,000,000 for thirty years, which is quite consistent with the apparent constancy of the wavelength mentioned by Lord Kitchener. Our observations, being affected by unsuspected systematic errors, and covering only a third of a century ...
openaire +3 more sources
Sensors, 2020 In the laser screen velocity measuring (LSVM) system, there is a deviation in the consistency of the optoelectronic response between the start light screen and the stop light screen.
Wenbo Chu +4 more
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Applied Sciences, 2023 Photoacoustic (PA) velocimetry holds the advantage of detecting ultrasound signals from selective targets sensitive to specific wavelengths of light irradiation.
Kotaro Fujinami, Katsuaki Shirai
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High Spatial and Temporal Resolution Bistatic Wind Lidar
Applied Sciences, 2021 The high-resolution bistatic lidar developed at the Physikalisch-Technische Bundesanstalt (PTB) aims to overcome the limitations of conventional monostatic lidar technology, which is widely used for wind velocity measurements in wind energy and ...
Paul Wilhelm +3 more
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PLoS ONE, 2020 This study investigated the inter- and intra-device agreement of four new devices marketed for barbell velocity measurement. Mean, mean propulsive and peak velocity outcomes were obtained for bench press and full squat exercises along the whole load ...
Alejandro Martínez-Cava +5 more
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Micromachines, 2020 Precise and quick measurement of samples’ flow velocities is essential for cell sorting timing control and reconstruction of acquired image-analyzed data.
Shuya Sawa +2 more
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