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Integrated measurement method of processing process based on visual laser combination

A technology of processing process and measurement method, applied in the field of geometric measurement, can solve problems such as poor adaptability of processing site and insufficient measurement accuracy, and achieve the effects of high measurement range robustness, high measurement accuracy, and measurement intelligence

Active Publication Date: 2019-06-28
DALIAN UNIV OF TECH
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Problems solved by technology

[0005] The problem to be solved by the present invention is to overcome the defects of poor adaptability to the processing site and insufficient measurement accuracy of the existing technical solutions, and to invent an integrated measurement method for the processing process based on visual laser combination

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  • Integrated measurement method of processing process based on visual laser combination
  • Integrated measurement method of processing process based on visual laser combination
  • Integrated measurement method of processing process based on visual laser combination

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Embodiment Construction

[0030] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0031] The laser scanner 5 used in this embodiment is the LJ-V7060 measuring instrument of Keyence Corporation, whose repeatability in the X-axis direction is 5 μm, and the repeatability in the Z-axis direction is 0.4 μm. The electric control platform 10 adopts the M521.DD model precision mobile platform of PI Company, and its repeated positioning accuracy is 0.2 μm. The laser tracker 2 is AT960 of Leica Company, and its measurement uncertainty is ±15 μm+6 μm / m. The models of cameras 7 and 9 in the binocular vision system are vieworks VC-12MC-M / C 65 cameras, resolution: 4096×3072, image sensor: CMOS, frame rate: full frame, up to 64.3fps. The lens model is EF16-35mmf / 2.8LIIUSM, lens focal length: f=16-35, APS focal length: 25.5-52.5, aperture: F2.8. The shooting conditions are as follows: the pixel of the picture ...

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Abstract

The invention relates to a combination type processing process integrated measurement method based on vision laser, and belongs to the field of geometric quantity measurement. The method adopts left and right cameras to realize online guidance of the pose of a tail end measurement device of a mechanical arm in a vision servo mode, so that local features of a part to be measured are in a measurement range of a laser scanner. The laser scanner is utilized to perform high-precision measurement on the local features, and a laser tracker is utilized to perform tracking positioning on the tail end measurement device; and the pose of the tail end measurement device is adjusted to perform multiple times of measurement on the part to be measured according to regions, and local laser scanning data of the multiple times of measurement are unified to a global coordinate system established based on the laser tracker. The method effectively solves the problem of high-precision processing process integrated measurement in a large space range, has the characteristics of high measurement precision, wide range and high robustness, and realizes large-space, cross-scale and high-precision processing process integrated measurement.

Description

technical field [0001] The invention belongs to the field of geometric quantity measurement, and relates to an integrated measurement method of processing process based on visual laser combination. Background technique [0002] In the field of aerospace, with the advancement of automation, robotic arms are gradually used for overall processing of large parts, and high-precision integrated measurement during processing is an important technical guarantee for high-quality processing. The size of large parts can reach several meters to tens of meters. The measurement requires both full-scale positioning and local measurement with micron-level accuracy. The measurement scale spans multiple orders of magnitude. The measured object is large in size and complex in structure, and it is very difficult to measure its geometric information with high precision. Therefore, it is of great significance to invent a large-space-oriented, cross-scale, and high-precision measurement method. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00
CPCG01B11/005
Inventor 刘巍邸宏图李辉逯永康张仁伟张洋贾振元司立坤
Owner DALIAN UNIV OF TECH
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