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A fast visual measurement system and method for high-temperature forging line reconstruction size

A visual measurement and forging technology, which is applied in the direction of measuring devices, instruments, and optical devices, can solve the problems of slow processing speed, incomplete measurement data, and large amount of point data information, and achieve high reconstruction efficiency, accurate positioning and extraction. Effect

Active Publication Date: 2020-05-05
SOUTHEAST UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of the point data obtained by the existing feature point reconstruction size measurement method, such as large amount of information, slow processing speed, and incomplete measurement data. , to perform three-dimensional reconstruction on the spatial contour of the forging, and then realize the dimension measurement

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  • A fast visual measurement system and method for high-temperature forging line reconstruction size

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[0032] The present invention will be further described below in conjunction with specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not as a limitation to the present invention.

[0033] Such as figure 1 As shown, the binocular vision measurement system built in this embodiment mainly includes the following parts: high computer 1: used to process the motor control signal of the screw guide rail 5, the acquisition control signal of the left camera 15 and the right motor 7, and the pattern of the projector 10 Projection signal; signal line 2: for signal transmission between computer 1 and left camera 15, right motor 7, projector 10, screw guide rail 5 motors; camera frame 3: for supporting screw guide rail bracket 4, and driving The bracket 4 as a whole realizes the transformation of the pitch angle α, the flip angle β, and the rotation angle γ, and can move according to the size of the measure...

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Abstract

The invention discloses a rapid vision measuring system and method for high-temperature forging line reconstruction size, which belong to the field of size measurement of high-temperature forgings, inparticular to three-dimensional reconstruction and size measurement using a line reconstruction method for the external contour of a forging. Firstly, a vision measuring system is built, and a visioncoordinate system is built; then, two cameras in the system are calibrated, and internal and external parameters of the two cameras are obtained to obtain the projection transformation from a world coordinate system in the two-camera model to a camera image plane coordinate system; a filter is added in front of a lens to suppress the influences of high-temperature radiation of the forging, and aprojector projects bright light on the surface of the forging to highlight the contour feature of a to-be-measured forging to improve the image quality; then, the contour line features of the forgingon left and right image planes are extracted; and finally, a forging three-dimensional space contour line is reconstructed according to the feature line corresponding to the left and right extracted images, the line outside the forging contour is trimmed off to obtain the reconstructed forging contour, the length of each forging section is calculated, and the size of each contour can be obtained.

Description

technical field [0001] The invention relates to the field of dimension measurement of high-temperature forgings, in particular to a system and method for fast visual measurement of high-temperature forging line reconstruction dimensions. Background technique [0002] The utilization rate of large forged steel ingots in China is very low, only 50%~55%, while that in South Korea is 60%~65%, and Japan leads the world, as high as 70%~75%. For the size measurement of forgings, most of the current domestic forging factories still use the traditional manual contact measurement method, with the help of simple manual measuring tools, reading directly under high temperature environment by naked eyes. When measuring the diameter of shaft forgings, different tools are used for different diameters: when the diameter of forgings is small, workers usually use large calipers to directly detect them at close range. The technical ability of workers has very high requirements, because the rea...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/245
CPCG01B11/245
Inventor 周怡君罗晨吴勇超王玉立
Owner SOUTHEAST UNIV
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