Large angle and high linearity two-dimensional laser scanner based on voice coil actuators

2011 ◽  
Vol 82 (10) ◽  
pp. 105103 ◽  
Author(s):  
Xin Wu ◽  
Sihai Chen ◽  
Wei Chen ◽  
Minghui Yang ◽  
Wen Fu
Keyword(s):  
Large Angle ◽  
Laser Scanner ◽  
Two Dimensional ◽  
High Linearity

A two-dimensional laser-scanner system for geotechnical processes monitoring

2018 ◽  
pp. 865-870 ◽  
Author(s):  
M.D. Valencia-Galindo ◽  
L.N. Beltrán-Rodriguez ◽  
J.A. Sánchez-Peralta ◽  
J.S. Tituaña-Puente ◽  
M.G. Trujillo-Vela ◽  
...  
Keyword(s):  
Laser Scanner ◽  
Two Dimensional

A phase-shift laser scanner based on a time-counting method for high linearity performance

2011 ◽  
Vol 82 (7) ◽  
pp. 075108 ◽  
Author(s):  
Heesun Yoon ◽  
Hajun Song ◽  
Kyihwan Park
Keyword(s):  
Phase Shift ◽  
Laser Scanner ◽  
Counting Method ◽  
High Linearity

A compact two-dimensional laser scanner based on piezoelectric actuators

2015 ◽  
Vol 86 (1) ◽  
pp. 013102 ◽  
Author(s):  
Chen Wei ◽  
Chen Sihai ◽  
Luo Dong ◽  
Jiao Guohua
Keyword(s):  
Laser Scanner ◽  
Piezoelectric Actuators ◽  
Two Dimensional

scholarly journals Results of inverse synthesis of two-dimensional radar images of objects with autofocusing in wide sectors of angles.

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
S.I. Moryakov ◽  
◽  
S.M. Nesterov ◽  
I.A. Skorodumov ◽  
◽  
...  
Keyword(s):  
High Resolution ◽  
Synthetic Aperture Radar ◽  
Large Angle ◽  
Synthetic Aperture ◽  
Synthetic Image ◽  
Wide Angle ◽  
Two Dimensional ◽  
Radar Images ◽  
Radar Systems ◽  
Wideband Radar

Modern wideband radar systems makes possible to obtain high resolution inverse synthetic aperture radar images of objects. One of the difficult actual approaches in radar test facilities is wide angle autofocusing processing. This paper proposed a recommendations to wide angle (above 10 degrees) inverse synthetic image autofocusing processing based on dividing a large angle sector into several small sections. Also proposed an experimental results of autofocusing processing in 30° and 60° angle sector.

An Experimental Investigation of Cavitation Inception and Development on a Two-Dimensional Eppler Hydrofoil

1999 ◽  
Vol 122 (1) ◽  
pp. 164-173 ◽  
Author(s):  
J.-A. Astolfi ◽  
P. Dorange ◽  
J.-Y. Billard ◽  
I. Cid Tomas
Keyword(s):  
Reverse Flow ◽  
Pressure Coefficient ◽  
Large Angle ◽  
Separated Flow ◽  
Leading Edge ◽  
Angle Of Incidence ◽  
Two Dimensional ◽  
Velocity Measurements ◽  
Cavitation Inception ◽  
Minimum Pressure

Cavitation inception and development on a two-dimensional foil with an Eppler E817 cross section issued from an inverse calculus have been experimentally investigated. The foil is theoretically designed to have a wide cavitation-free bucket allowing a large range of cavitation-free angle of incidence (Eppler, R., 1990, Airfoil Design and Data, Springer-Verlag, Berlin). The inception cavitation numbers, the noise level, the velocity distribution, the minimum pressure coefficient, the cavitation patterns (bubble, leading edge “band type” cavitation, attached sheet cavity), together with the sheet cavity length have been experimentally determined. Effects on the velocity field have been studied too with a slightly developed cavitation. For angles of incidence larger than 1 deg, a great difference exists between the inception cavitation number and the theoretical minimum pressure coefficient. However it is in agreement with the measured one obtained from velocity measurements (for 0 deg<α<6 deg). Discrepancy between theory and experiment on scale models is generally attributed to a flow separation at the leading edge. Although there are some indications of a separated flow at the leading edge, the velocity measurements do not show reverse flow with clearly detected negative velocities excepted for a large angle of incidence equal to 10 deg. Concerning sheet cavity development, the length cavity is found to scale as [σ/2α−αiσ]−m with m close to 2, for length cavities that do not exceed half the foil chord and for σ/2α−αiσ larger than about 30. [S0098-2202(00)00201-7]

scholarly journals Forestry crane posture estimation with a two-dimensional laser scanner

2018 ◽  
Vol 35 (7) ◽  
pp. 1025-1049 ◽  
Author(s):  
Heikki Hyyti ◽  
Ville V. Lehtola ◽  
Arto Visala
Keyword(s):  
Laser Scanner ◽  
Two Dimensional ◽  
Posture Estimation

scholarly journals New Hybrid Algorithms for Estimating Tree Stem Diameters at Breast Height Using a Two Dimensional Terrestrial Laser Scanner

Sensors ◽  
2015 ◽  
Vol 15 (7) ◽  
pp. 15661-15683 ◽  
Author(s):  
Jianlei Kong ◽  
Xiaokang Ding ◽  
Jinhao Liu ◽  
Lei Yan ◽  
Jianli Wang
Keyword(s):  
Laser Scanner ◽  
Hybrid Algorithms ◽  
Terrestrial Laser Scanner ◽  
Two Dimensional ◽  
Breast Height ◽  
Tree Stem
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