Large-scale structural component assembly joining measurement method based on visual principle

A technology of large-scale structural parts and measurement methods, which is applied in the field of mechanical assembly and manufacturing, and can solve problems such as high cost and large errors

Inactive Publication Date: 2016-06-01
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH +1
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of high cost or large error in the assembly and docking measurement of existing large structural parts, and to provide a method for assembly and docking measurement of large structural parts based on the principle of vision

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  • Large-scale structural component assembly joining measurement method based on visual principle
  • Large-scale structural component assembly joining measurement method based on visual principle
  • Large-scale structural component assembly joining measurement method based on visual principle

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Embodiment Construction

[0034] The following is an introduction to a large-scale structural member assembly butt joint measurement method based on the vision principle in conjunction with the accompanying drawings and embodiments:

[0035] Such as figure 1 As shown in Fig. 1, a method for measuring the assembly butt joint of large structural parts based on the principle of vision includes the following steps:

[0036] The first step: arrange the measurement camera and calibrate it;

[0037] Place the two structural parts to be assembled on the adjustment frame in the assembly workshop, define one of the structural parts as a fixed part, and its position and posture will not change during the assembly process, and the other structural part is a movable part. By adjusting the movable part The position and posture of the machine are aligned with the fixed parts to complete the assembly. According to the site conditions of the assembly workshop, two measuring cameras are arranged, and the two cameras a...

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Abstract

The invention belongs to the field of mechanical assembly manufacturing technology, in particular relates to large-scale structural component assembly joining measurement method based on the visual principle, and aims to solve the problems of either high cost or large errors of conventional large-scale structural component assembly joining measurement. The method comprises the steps of setting and calibrating a measurement camera, mounting optical control points on structural components to be measured, measuring three-dimensional coordinates of the optical control points, establishing an assembly coordinate system and solving the attitude deviation among the assembled structural components. The method solves the problems of online measurement of the six-degree of freedom attitude deviation in the large-scale structural component assembly joining process by using the stereoscopic visual principle of a dual camera. The method is simple in equipment measurement, low in cost, and capable of detecting elastic deformation of large-scale structural components. Experimental results show that when the assembly measurement space is 5m*5m*5m and the number of adopted feature light spots reaches 5, the root-mean-square error of the attitude measurement method maintains within 0.05 degrees, the refresh rate reaches 200 frames per second, and the data are accurate and reliable.

Description

technical field [0001] The invention belongs to the technical field of mechanical assembly and manufacturing, and in particular relates to a measurement method for assembly and docking of large structural parts based on the principle of vision. Background technique [0002] In the field of large-scale processing and manufacturing such as aircraft and ships, the precise assembly of large-scale mechanical structures has always been a technical problem in the production process. For example, in the assembly of aircraft wings and fuselage, due to the large size of the structure and the large range of docking surfaces, it is impossible to judge whether the attitude of the wing is adjusted to align with the fuselage through human observation. The assembly process can easily cause damage to the fuselage, and the efficiency low. Therefore, it is necessary to measure the relative attitude of the two bodies during the assembly process to ensure the fast and accurate assembly process....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00
Inventor 孙增玉刘柯宋金城郭磊高越董利军王强曹玉梅
Owner BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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