Line laser-based complex heterogeneous product assembly parameter detection method and system

Abstract

The invention discloses a line laser-based complex heterogeneous product assembly parameter detection method and system, and relates to the technical field of laser measurement. The key points of the technical scheme are as follows: placing a high-precision diffuse reflection ceramic standard ball on a rotary table, and carrying out light strip scanning on the standard ball by using a line laser to obtain a direction vector and a rotation center point of a rotating shaft; performing translation scanning on the bottom curved surface area of a complex heterogeneous product and performing rotation scanning on the to-be-detected areas of the angular spherical surface and the inner curved surface to obtain corresponding light bar data, and according to the obtained rotating shaft, performing Cartesian rectangular coordinate conversion to obtain three-dimensional point cloud data of the complex heterogeneous product; segmenting the three-dimensional point cloud data according to regions to obtain an angular spherical point cloud, an inner curved surface point cloud, and a bottom curved surface point cloud; calculating the height of a cavity, an angle spherical fit degree, an angle spherical oblique circle run-out, and an inner curved surface oblique circle run-out. The method has higher measurement efficiency, measurement consistency, and measurement accuracy, and realizes high-precision and high-efficiency measurement of assembly parameters.

Description

technical field [0001] The invention relates to the technical field of laser measurement, in particular to a method and system for detecting assembly parameters of complex heterogeneous products based on line lasers. Background technique [0002] A complex heterogeneous product such as figure 1 As shown, it is equipped with a corner base and a top cover, which is called a corner part, and the corner part is composed of a plurality of corner spherical surfaces, inner curved surfaces, and bottom curved surfaces. After the product assembly is completed, the main assembly parameters such as the oblique circular runout of the branch angle spherical surface, the oblique circular runout of the inner surface at the specified diameter, and the depth of the cavity formed by the lower hemisphere formed by the angular spherical surface and the extreme value of the bottom surface, and the angle ball High-precision detection of the spherical fit gap formed by the surface, etc., to determ...

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Problems solved by technology

[0003] In order to solve the problems of existing complex heterogeneous product assembly parameter detection, such as the lack of high precision and contact measurement of the center of the angular spherical surface, the purpose of the present invention is to provide a complex heterogeneous product assembly parameter detection method based on line laser and System, with the characteristics of non-contact, high efficiency, high precision and excellent measurement consistency

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