Publication | Closed Access
A Digital Video Model Deformation System
12
Citations
0
References
1986
Year
EngineeringImage AnalysisCalibrationCamera CalibrationDigital Image CorrelationSystems EngineeringWind TunnelKinematicsComputational GeometryGeometric ModelingMachine VisionTime-of-flight CameraVideo ManipulationStructural Health MonitoringNew System3D VideoStructure From MotionDeformation ReconstructionComputer VisionNatural SciencesDigital PhotogrammetryCivil EngineeringCamera Technology
The use of slid-state array cameras and a PC controlled image acquisition system to measure model deformation in a wind tunnel is discussed. This digital system is an improvement to an earlier video model deformation system used at the National Transonic Facility (NTF) which employed high-resolution tube cameras and required the manual measurement of targets on video hardcopy images. The new system eliminates both the vibration-induced distortion associated with tube cameras and the manual readup of video images necessary in the earlier version. Camera calibration and data reduction procedures necessary to convert pixel image plane data from two cameras into wing deflections are presented. Laboratory tests to establish the uncertainty of the new system with the geometry to be used at the NTF are described.