Results 41 to 50 of about 1,287,395 (305)
Sensors, 2019 In a multifrequency phase-shifting (MFPS) algorithm, the temporal phase unwrapping algorithm can extend the unambiguous phase range by transforming the measurement range from a short fringe pitch into an extended synthetic pitch of two different ...
Duc-Hieu Duong +2 more
doaj +1 more source
Why GPS makes distances bigger than they are [PDF]
, 2015 Global Navigation Satellite Systems (GNSS), such as the Global Positioning System (GPS), are among the most important sensors for movement analysis. GPS is widely used to record the trajectories of vehicles, animals and human beings.
Brunauer, Richard +4 more
core +2 more sources
Optical Setup for Error Compensation in a Laser Triangulation System
Sensors, 2020 Absolute distance measurement is a field of research with a large variety of applications. Laser triangulation is a well-tested and developed technique using geometric relations to calculate the absolute distance to an object.
Patrick Kienle +6 more
doaj +1 more source
Absolute distance measurement with sub-fringe resolution [PDF]
International Conference on Space Optics — ICSO 2010, 2019 A novel technique to measure absolute distances is presented. It is based on a Michelson interferometer where two tuneable lasers are superposed to create a synthetic wavelength. Relative and absolute interferometry theories are merged together. Its experimental realization allows absolute distance measurements with subfringe resolution.
N. Antonietti, A. Giugni, M. Pisani
openaire +1 more source
Sensors, 2021 Options for monitoring sports have been continuously developed by using activity trackers to determine almost all vital and movement parameters. The aim of this study was to validate heart rate and distance measurements of two activity trackers (Polar ...
Mario Budig +4 more
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Characteristics of Distance Errors of Infrared Sensor Relation to Colour Surfaces
Acta Technologica Agriculturae, 2022 This paper deals with the determination of the absolute errors of a small time of flight (ToF) distance sensor with respect to coloured surfaces at different illumination intensities.
Hrubý Dušan +6 more
doaj +1 more source
, 2006 In this paper, we report on new high-precision absolute distance measurements performed with frequency scanned interferometry using a pair of single-mode optical fibers.
Barwood +12 more
core +2 more sources
VLBI astrometry of PSR J2222-0137: a pulsar distance measured to 0.4% accuracy [PDF]
, 2013 The binary pulsar J2222-0137 is an enigmatic system containing a partially recycled millisecond pulsar and a companion of unknown nature. Whilst the low eccentricity of the system favors a white dwarf companion, an unusual double neutron star system is ...
Boyles, J. +7 more
core +3 more sources
Scientific Reports, 2022 The existing typical combined query image retrieval methods adopt Euclidean distance as sample distance measurement method, and the model trained by triple loss function blindly pursues absolute distance between samples, resulting in unsatisfactory image
Zhiwei Zhang, Liejun Wang, Shuli Cheng
doaj +1 more source
VLBI Astrometry of AGB Variables with VERA -- A Semiregular Variable S Crateris --
, 2008 We present a distance measurement for the semiregular variable S Crateris (S Crt) based on its annual parallax. With the unique dual beam system of the VLBI Exploration for Radio Astrometry (VERA) telescopes, we measured the absolute proper motion of a ...
Ando, Kazuma +42 more
core +1 more source