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

A heterogeneous product and parameter detection technology, which is applied in the field of laser measurement, can solve the problems of high-precision and contact measurement of the center of the angular spherical surface, and achieve high measurement efficiency.

Active Publication Date: 2021-11-09
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Effect test

Embodiment 1

[0056] Embodiment 1: A method for detecting assembly parameters of complex heterogeneous products based on line lasers, such as figure 1 and figure 2 As shown, the complex heterogeneous product is a corner part assembled with a corner base and a top cover.

[0057] 1. Shaft calibration based on a single standard sphere

[0058] Place the high-precision diffuse reflective ceramic standard ball on the turntable, and use the line laser to scan the standard ball with light stripes to obtain the direction vector of the rotating shaft and the center point of rotation.

[0059] The calculation process of the direction vector and the rotation center point of the rotation axis is as follows:

[0060] S101: Perform least squares ellipse fitting on each light strip on the standard sphere to obtain the corresponding initial circle center position.

[0061] S102: Carry out least squares ellipse fitting on the initial center position again, and obtain the final center position as the ro...

Embodiment 2

[0100] Embodiment 2: A complex heterogeneous product assembly parameter detection system based on line laser, such as figure 1 and Figure 5 As shown, the complex heterogeneous product is a corner component equipped with a corner base and a top cover, including a scanning module, a data conversion module, a data segmentation module, a first computing module, and a second computing module.

[0101] The scanning module is used to place the high-precision diffuse reflection ceramic standard ball on the turntable, and use the line laser to scan the standard ball with light stripes to obtain the direction vector of the rotating shaft and the center point of rotation. The data conversion module is used to translate and scan the bottom curved surface area of ​​complex heterogeneous products and rotate and scan the angular spherical surface and inner curved surface to obtain the corresponding light strip data, and perform Cartesian coordinate conversion according to the obtained rotat...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/66G06T7/33G06T7/62G06T17/10G01B11/24
CPCG06T7/0004G06T7/66G06T7/337G06T7/62G06T17/10G01B11/24G06T2207/10028G06T2207/30164Y02P90/30
Inventor 于长志刘延龙李芳张连新孙鹏飞曹宇付磊肖虹
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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