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检索式: ((("Beijing Institute of Technology") WN AF) AND ((laser) WN TI)), 2009-2010
检索结果: 1篇命中文献
Accession number: 20091311985997
Title: The application of image processing in the measurement for three-light-axis parallelity of laser ranger
Authors: Wang, Yang1 ; Wang, Qianqian1
Author affiliation: 1 Beijing Institute of Technology
Corresponding author: Wang, Y. (Fanny_8319@163.com)
Source title: Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title: Proc SPIE Int Soc Opt Eng
Volume: 7156
Monograph title: 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments
Issue date: 2009
Publication year: 2009
Article number: 71561R
Language: English
ISSN: 0277786X
CODEN: PSISDG
Document type: Conference article (CA)
Conference name: 2008 International Conference on Optical Instruments and Technology: Optical Systems and Optoelectronic Instruments
Conference date: November 16, 2008 - November 19, 2008
Conference location: Beijing, China
Conference code: 75967
Publisher: SPIE, P.O. Box 10, Bellingham WA, WA 98227-0010, United States
Abstract: When laser ranger is transported or used in field operations, the transmitting axis , receiving axis and aiming axis may be not parallel . The nonparallelism of the three-light-axis will affect the range-measuring ability or make laser ranger not be operated exactly. So testing and adjusting the three-light-axis parallelity in the proction and maintenance of laser ranger is important to ensure using laser ranger reliably .The paper proposes a new measurement method using digital image processing based on the comparison of some common measurement methods for the three-light-axis parallelity. It uses large aperture off-axis paraboloid reflector to get the images of laser spot and white light cross line, and then process the images on LabVIEW platform. The center of white light cross line can be achieved by the matching arithmetic in LABVIEW DLL. And the center of laser spot can be achieved by gradation transformation, binarization and area filter in turn. The software system can set CCD, detect the off-axis paraboloid reflector, measure the parallelity of transmitting axis and aiming axis and control the attenuation device. The hardware system selects SAA7111A, a programmable vedio decoding chip, to perform A/D conversion. FIFO (first-in first-out) is selected as buffer.USB bus is used to transmit data to PC. The three-light-axis parallelity can be achieved according to the position bias between them. The device based on this method has been already used .The application proves this method has high precision, speediness and automatization. © 2009 SPIE.
Number of references: 10
Main heading: Lasers
Controlled terms: Charge coupled devices - Concurrency control - Decoding - Digital cameras - Digital image storage - Image processing - Imaging systems - Optical data processing - Optical instruments - Photolithography - Range finding - Reflection
Uncontrolled terms: CCD - Cross line - Digital image processing - Labview - Laser ranger - Laser spot - Parallelism
Classification code: 741.3 Optical Devices and Systems - 742.2 Photographic Equipment - 744.1 Lasers, General - 741.1 Light/Optics - 745.1 Printing - 941.3 Optical Instruments - 943.2 Mechanical Variables Measurements - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 714.2 Semiconctor Devices and Integrated Circuits - 716.1 Information Theory and Signal Processing - 722.1 Data Storage, Equipment and Techniques - 711 Electromagnetic Waves - 722.4 Digital Computers and Systems - 723.3 Database Systems - 731.3 Specific Variables Control - 723.2 Data Processing and Image Processing
DOI: 10.1117/12.806597
Database: Compendex
