Method and system for measuring parameters of bent pipe

Abstract

The invention provides a method and system for measuring parameters of a bent pipe. The method comprises the following steps of: acquiring an inner parameter and an outer parameter of a multi-view camera; acquiring an image of the bent pipe through the multi-view camera to acquire a planar gray scale image of the bent pipe; correcting the planar gray scale image according to the inner parameter and the outer parameter of the multi-view camera to acquire a corrected image; acquiring a bent pipe region from the corrected image; acquiring an edge line and a center line of the bent pipe region; acquiring the diameter of the bent pipe according to the edge line; dispersing the center line into a plurality of characteristic points and acquiring space coordinates of the plurality of characteristic points; re-fitting the space coordinates of the plurality of characteristic points to obtain a center line of the bent pipe; and determining space parameters of the bent pipe according to the diameter and the center line of the bent pipe. During measurement of the bent pipe, the method and the system are high in speed and more precise.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a method and system for measuring bend parameters based on multi-eye vision. Background technique [0002] In today's pipe bending industry, people pay more and more attention to the cost-effectiveness of products, and put forward more and more strict requirements on the quality of processed products, especially in the fields of aerospace, aviation, shipbuilding and automobile industries. In these fields, there are often some large-sized, complex spatial forms of elbows, and the quality of their processing will inevitably directly affect the assembly of the elbows, and even affect the quality of the final product. [0003] In the existing technology, at present, the spatial pose measurement of the curved pipe at home and abroad mainly includes the following two measurement methods: [0004] The first: contact measurement method based on mechanical device [0005] This tradi...

AI Technical Summary

Problems solved by technology

[0012] However, due to the matching method based on epipolar and centerline constraints, binocular measurements alone are not enough for fast single-shot measurements of the spatial pose of complex bends

The reason is that in the process of collecting the image of the curved pipe, occlusion often occurs, and in the process of epipolar line matching, the center line will also have a wrong match, and the measurement of the entire curved pipe cannot be realized

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