ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
This paper presents a method to measure the deformation of large deployable meshmicrowave antenna by using the photogrammetric technology. Because the mesh reflector surface iscontrolled by 79 nodes, measuring 3D coordinates of these nodes accurately is the key to test thedeformation of antenna. The technique of camera calibration, the matching method of the imagepoints, and the solution of measuring 3D points are introduced in this paper. The experimental data isalso provided. This paper proposes a method to calculate the spatial coordinates of microwaveantenna nodes by using the bundle adjustment with distance constraints. This method is capable ofcorrecting the influences of the lens distortion and improving system measurement accuracy. Inreference to the fact that the surface of this antenna is controlled by 79 nodes, and the designparameter of these nodes is already known, a method based on digital surface model constrain is usedto solve the image points matching problem. This method efficiently simplifies the computationprocedure and shortens the measurement time
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.381-382.309.pdf
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