DocumentCode :
1955558
Title :
Investigation of Ice Shape Measurement Technique Based on Laser Sheet and Machine Vision in Icing Wind Tunnel
Author :
Long, Zhang ; Longde, Guo ; JianJun, Yang
Author_Institution :
Facility Design & Instrum. Inst., China Aerodynamics R& D Center, Mianyang, China
fYear :
2009
fDate :
20-23 Sept. 2009
Firstpage :
790
Lastpage :
795
Abstract :
For the sake of developing an ice shape profilometer in icing wind tunnel, the technique of ice shape measurement based on laser sheet and machine vision is studied. The measurement principle and computing theory have been demonstrated in detail. The instrument projects a thin sheet of laser light onto an ice shape and uses high resolution CCD cameras to detect the light scattered by the ice. According to the camera calibration results, the instrument corrects the camera images through the step of image processing, calculates and reconstructs the stereo profile, displays an outline of the ice shape on the computer screen. The primary accomplished tasks have been pointed out in this paper. The system measurement results of length, angle, radius and ice shape have been brought out. The instrument has undergone extensive testing through measuring several kinds of objects. Results of tests show very good agreement between the measurement value and the gauge. With the technique, the thickness and shape of ice accretions on the leading edge of airfoils and other models in wind tunnels can be real-time measured.
Keywords :
aerodynamics; aerospace simulation; computer vision; ice; image resolution; light scattering; measurement by laser beam; shape measurement; wind tunnels; airfoils; camera calibration; camera images; computing theory; high resolution CCD cameras; ice accretions; ice shape measurement technique; ice shape profilometer; icing wind tunnel; image processing; laser sheet; light scattering; machine vision; measurement principle; system measurement; Cameras; Charge coupled devices; Charge-coupled image sensors; Computer displays; Ice; Instruments; Laser theory; Machine vision; Shape measurement; Testing; laser; machine vision; measurement; wind tunnel;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Image and Graphics, 2009. ICIG '09. Fifth International Conference on
Conference_Location :
Xi´an, Shanxi
Print_ISBN :
978-1-4244-5237-8
Type :
conf
DOI :
10.1109/ICIG.2009.137
Filename :
5437909
Link To Document :
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