A Precise Positioning Method for Square Patch Based on Contour Scanning
A precise positioning and patching technology, applied in measuring devices, instruments, optical devices, etc., can solve the problems of limited use, inability to measure parts, and small identification range, and achieve the effect of reducing labor intensity and improving work efficiency.
Active Publication Date: 2017-12-15
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
Method used
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[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0034] This embodiment is for the aluminum alloy aircraft panel with curvature of length * width * thickness = 5000mm * 1400mm * 2mm to carry out accurate pasting, and the pasting edge distance is l1, l2 accuracy is all 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 is composed of the first contour scanner and the second contour scanner moving along the tool coordinate system X and Y directions and their respective guide ra...
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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 method for precise positioning of a square patch based on contour scanning, which is used for automatic patch assembly according to the contour information around the pre-assembled position of the patch when a robot patch system performs automatic patch assembly. Accurately locate the position coordinates of the target point on the aircraft wall panel to meet the accuracy requirements of the edge distance between the patch to be patched and the adjacent heat shield, 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 special-purpose small aircraft need to be covered with a layer of heat insulation sheets on the periphery of the fuselage, and the distance between adjacent heat insulation sheets is an important technical parameter to ensure the qua...
Claims
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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