Rapid high-precision normal vector measurement method for hole making point of complicated curved surface

Abstract

The invention provides a rapid high-precision normal vector measurement method for a hole making point of a complicated curved surface, belongs to the technical field of vision measurement of a computer and relates to the rapid high-precision normal vector measurement method for the hole making point of the complicated curved surface. The method adopts a method for normal vector measurement based on binocular vision combined with a dynamic projection point. The measurement method comprises the following steps: firstly carrying out layout optimization of the dynamic projection point; extracting the edge position of the projection point by adopting a Canny edge detection operator; rapidly extracting the coordinates of the center of the projection point by adopting an ellipse-fitting algorithm; carrying out three-dimensional reconstruction corresponding to the extracted coordinates of the projection point of an acquired image; and finally accurately fitting the three-dimensional surface information of the surface of a component inside the neighborhood of the hole making point based on a quadric surface fitting algorithm, and solving to obtain the normal vector of the position of the hole making point. By adopting a projection mode of the dynamic projection point, the method can increase the quantity of measurable spatial points, can adjust the position and quantity of the points according to needs so as to adapt to the requirements of different surfaces, and can satisfy the requirement of rapid high-precision measurement of the normal vector of the hole making point of the complex curved surface.

Description

technical field [0001] The invention belongs to the technical field of computer vision measurement, and relates to a fast and high-precision vector measurement method for hole-making point method on complex curved surfaces. Background technique [0002] As the core link in the process of aircraft manufacturing, the assembly of aircraft components directly determines the development level of aircraft manufacturing, and its assembly research is a hot spot in international research. According to statistics, assembly accounts for 50% to 70% of aircraft manufacturing workload, and 50% of fatigue cracks occur at assembly joints. Therefore, high reliability and low damage assembly holes are the premise and basis for ensuring aircraft structure safety and long service life. In the field of aircraft assembly, in order to ensure the normal accuracy of riveting and bolting holes, in the automatic drilling and riveting process, it is necessary to measure the normal vector at the hole-ma...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to solve the problem of low accuracy and low efficiency of the vector measurement method with multiple holes on the complex surface of large aviation parts, and invented a normal vector measurement method based on binocular vision combined with dynamic projection points

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