Photogrammetric Technology And Applied It To The Study Of Deformation

In order to establish unified attitude datum of entire ship, it's necessary to estimate the deformation of ship's deck, then revision local datum. In this paper, A major study is distributed attitude measurement system based on the method of photographic measurement, and applied to the study of deck deformation field.Photographic measurement is based on the model of camera; the first is to establish a nonlinear mathematical model. The model can cope with the actual measurements circumstances and to better deal with the adverse effects of image distortion. A camera calibration algorithm that is based on planar targets is selected to calibrate camera. Main data come from the image processing; data accuracy is an important factor affecting the measurement accuracy. In this paper, curve fitting, regional segmentation of the images and other means is used to address and improve data accuracy. Finally, based on photographic measurement theory, the method calculating the initial and the ultimate value of target's attitude and location is acquired. Experiments prove that the measurement results in line with the actual requirements of the measurement.Deformation of ship's deck caused the change of weapons' attitude and location, distributed measurement system measuring attitude and location changes of the key deformation places in deck. Weapons are not exactly in these key places, it is also necessary to establish the relationship between the two. In the paper, the cubic spline function is used to overall deformation of deck, and then the data of weapons location can be obtained. Matlab simulation shows that the cubic spline function can be used to fit the deck deformation.