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Thin plate piece assembly deviation online measurement method

A measurement method and thin plate technology, applied in the field of optical measurement, can solve the problems of high price, low measurement efficiency, lack of measurement methods, etc., achieve low cost, improve measurement efficiency, and realize the effect of visualization

Active Publication Date: 2021-06-01
SOUTHEAST UNIV
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Problems solved by technology

Traditional visual measurement systems designed using the principle of Fourier transform profilometry include optical pen-type visual measurement systems, institutional optical scanning measurement systems based on three-coordinate measuring machines, and 3D scanners. The former two can only do point measurement, and the measurement efficiency is low. , the latter is expensive, so how to use simple equipment to complete the online measurement of thin plate assembly deviation still lacks a systematic measurement method

Method used

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  • Thin plate piece assembly deviation online measurement method
  • Thin plate piece assembly deviation online measurement method
  • Thin plate piece assembly deviation online measurement method

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Embodiment Construction

[0045] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0046] Such as Figure 8 As shown, the online measurement method of a thin plate component assembly deviation in this embodiment is carried out according to the following steps:

[0047] S1: if figure 1 As shown, the measurement platform 1 based on Fourier transform profilometry is built, and the position of the camera 2 and projector 3 is initially installed so that it roughly meets the constraint principle of Fourier transform profilometry. According to the four determinations on the assembly platform 4 The position of the support angle iron 5 for the fixed positioning of the thin plate and the height-adjustable support column 6 is placed, and the measurement assembly 1 is placed at a suitable position above the assembly platform 4, so that the space for assembly work is within the field of view of the camera;

[0048] S2: After the preliminary ...

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Abstract

The invention relates to a thin plate assembly deviation online measurement method, which comprises the following steps of: arranging a measurement platform based on Fourier transform profilometry above an assembly platform, placing and adjusting a reference surface to be horizontal; adjusting a camera and a projector to positions meeting the principle of Fourier transform profilometry according to the required camera field of view; shooting a calibration plate for calibration; shooting reference plane stripes; placing a standard component, and shooting the standard component for system calibration of phase and height; taking down the reference surface and the standard component, and shooting stripes before and after sheet assembly; and solving the thin plate contour data before and after assembly to obtain the thin plate assembly deviation so as to realize online measurement of the thin plate assembly deviation. The measuring system is simple in method, low in cost and wide in application.

Description

technical field [0001] The invention relates to the technical field of optical measurement, in particular to an online measurement method for assembly deviation of thin plate parts. Background technique [0002] In recent years, with the development of science and technology and the improvement of industrial level, different industries that mainly focus on processing, manufacturing and assembly, such as mold manufacturing, automobile and shipbuilding, and aerospace, have required large-scale, high-precision three-dimensional contour measurement technology and online measurement Assembly error technology puts forward higher and higher requirements. [0003] The visual measurement system based on machine vision theory has been widely used in thin plate size and assembly deviation measurement due to its advantages of non-contact, low cost, high efficiency, high degree of automation, and high measurement accuracy. Fourier transform profilometry The three-dimensional outline of ...

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Application Information

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IPC IPC(8): G01B11/24
CPCG01B11/2433
Inventor 罗晨徐超周怡君
Owner SOUTHEAST UNIV
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