Square patch accurate positioning method based on contour scanning
A technology of precise positioning and placement, which is applied in the direction of measuring devices, instruments, and optical devices, etc., can solve the problems of limited use, inability to measure parts, and small recognition range, so as to reduce labor intensity and improve work efficiency.
Active Publication Date: 2016-03-16
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
However, a problem with the machine vision system is that in order to meet the accuracy requirements, its recognition range is relatively small, and it cannot realize one-time complete measurement of large parts, resulting in limitations in use.
The shape of the heat shield is square, and its size exceeds the measurement range of the general vision system, so it is impossible to realize a comprehensive measurement of the heat shield
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[0033] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.
[0034] This embodiment is to accurately patch the aluminum alloy aircraft wall panel with length×width×thickness=5000mm×1400mm×2mm with curvature. The patch margins are l1 and l2, and the precision is controlled within 1mm±0.08mm (such as image 3 Shown).
[0035] The principle of the method of the present invention is that the contour scanning system consists of a first contour scanner and a second contour scanner that move along the X and Y directions of the tool coordinate system and their respecti...
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The invention provides a square patch accurate positioning method based on contour scanning. A closed-loop system formed by a contour measurement system, an upper computer and a robot integration unit is used, position information of an already had heat isolation sheet at an edge of a patch to-be-attached region is measured and fed back in real time, an actual space position of a target point is automatically calculated through a boundary geometric point, and, through iteration correction of the closed-loop system, position precision of a robot patch positioning point is guaranteed. Through sensor positioning, edge ceramic chip scanning, automatic calculation deviation correction, robot motion, sensor secondary alignment and other processes, accurate and rapid patch attachment of an airplane wallboard is achieved, a high assembly precision requirement of the airplane wallboard is guaranteed, and labor intensity is reduced.
Description
Technical field [0001] The invention belongs to the field of advanced digital assembly, and specifically relates to a square patch precise positioning method based on contour scanning, which is used for automatic patch assembly by a robotic patch system according to the contour information around the patch pre-assembly position. Accurately find the position coordinates of the target point on the aircraft wall, meet the accuracy requirements of the margin between the patch to be patched and the adjacent heat insulation sheet, and realize the accurate and fast assembly of the patch. Background technique [0002] In order to meet the technical requirements of high temperature resistance, some small aircrafts for special purposes need to be covered with a layer of heat insulation sheet on the periphery of the fuselage, and the distance between adjacent heat insulation sheets is an important technical parameter to ensure the quality of heat insulation, and the gap must be strict Meet ...
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Login to View More IPC IPC(8): G01B11/00
CPCG01B11/002
Inventor 张开富谢欢欢程晖邹鹏刘平严小烨
Owner NORTHWESTERN POLYTECHNICAL UNIV