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Source title: Wuli Xuebao/Acta Physica Sinica
Abbreviated source title: Wuli Xuebao
Volume: 62
Issue: 9
Issue date: May 5, 2013
Publication year: 2013
Article number: 094215
Language: Chinese
ISSN: 10003290
CODEN: WLHPAR
Document type: Journal article (JA)
Publisher: Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100190,
China
Abstract: There has been great difference between the theoretical signals of the lidar's echo
and its actual signals, due to the angles between the laser beam and its receiving optical axis, and
the laser intensity distribution being asymmetrical. So the correction of the echo signal is
necessary. According to the mathematical derivation and the software simulation, the
mathematical expression of the lidar's overlap factor is given, and the overlap factor curves with
detection range are drawn which express the characters over the total detection range, then the
best angle between lidar's emitting axis and the receiving axis is obtained. The overlap factors are
analyzed when the laser is Gaussian with a uniform intensity distribution. The lidar distance
correction signal and Klett formula are corrected by the overlap factor, and the instrument
parameters of the lidor are measured. In the range where the overlap factor is not zero, its
correction echo signals and extinction coefficients can be obtained by using the corrected Klett
formula. While in the range of the lidar's blind zone, the signals can be derived by a slope method.
Finally, the total correction curve of the extinction coefficients is gained, and it is in accordance
with the actual one correction cuive. © 2013 Chinese Physical Society.
Number of references: 9
Main heading: Signal detection
Controlled terms: Computer software - Electric power factor correction - Optical radar
Uncontrolled terms: Distance corrections - Extinction coefficients - Laser intensity
distribution - Mathematical derivation - Mathematical expressions - Mie-scattering
lidar - Overlap factor - Software simulation
Classification code: 706 Electric Transmission and Distribution - 716.1 Information Theory
and Signal Processing - 716.2 Radar Systems and Equipment - 723 Computer Software,
Data Handling and Applications
DOI: 10.7498/aps.62.094215
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
2.
Accession number: 20132316401628
Title: Preparation and characterization of an asphalt-modifying agent with waste packaging
polyethylene and organic montmorillonite