Research Of Abnormity Bores’ Contour Measure System Based On Vision Measurement

This thesis started from studying typical industrial photogrammetric technology programs at home and abroad, summed up the application conditions, proposed a new photogrammetric technology program to improve the present situation there was no efficient way to measure the abnormity bores’ edge profile parameters. And pre-research the abnormity bores’ edge profile measurement system based on the principle of photogrammetric, to satisfied the practical needs for the high precision and efficiency measuring technology in the process of China’s nuclear power development.Firstly, according to the measurement accuracy, this paper determined the system overall design index, and put forward a push-broom photogrammetric technique with planar image sensor, and made the overall design of the measurement system from the whole situation, verified the system main hardware selection fit the demands by theoretical analysis and experiments.Secondly, this thesis simulated the system problem caused by the imaging magnification changes. In order to prove feasibility of solutions for the problem, this thesis adopt the following methods to demonstrate system measurement accuracy:1、 to generate the image with any arbitrary resolution;2、to propose a image pre-processing method on the basis of the spectral resolution, for keeping the most original information of the edge profile;3、to demonstrate the Snakes model energy function method before high precision positioning extract the edge contour;4、to put forward the mathematical relationship between an arc radius which could be distinguished by the approximate curvature and the approximate step. And apply the results to split up the contour;5、fitting each curves of the contour and measuring the geometric parameters;6、to make error precision analysis for each curves.Last, the measurement system extracted the image contour and fitting measure the geometrical features parameters. At last, the thesis demonstrated the feasibility of the system by applying the error analysis theory, provided a theoretical basis for further instrument development work and data support.