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Non-contact measurement method for sizes of forged pieces

A technology of size and measured objects, applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problems of limited measurement range and low resolution, achieve high-precision measurement, improve system resolution, and avoid the effect of target matching

Inactive Publication Date: 2014-09-10
BEIJING INSTITUTE OF TECHNOLOGYGY +2
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of non-contact measurement of forging size, to overcome the defects of low resolution and limited measurement range of existing technical solutions, and to provide an online non-contact measurement of forging based on linear array CCD camera and line structured light projector. size method

Method used

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  • Non-contact measurement method for sizes of forged pieces
  • Non-contact measurement method for sizes of forged pieces
  • Non-contact measurement method for sizes of forged pieces

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Embodiment Construction

[0032] The specific implementation of the present invention is described in detail with reference to the accompanying drawings and technical solutions:

[0033] An on-line scanning measurement device for three-dimensional topography of forgings, such as figure 1 Shown: The linear array CCD camera 8 is installed on the two-degree-of-freedom PTZ 1, the linear structured light projector 3 is installed on the single-DOF PTZ 2, and the two PTZs are separated by a certain distance according to the size requirements of the measured object Place the gimbal 1 and 2, and the distance between them is the so-called baseline distance. The baseline distance should be designed according to the size of the measured object, and the baseline distance has an impact on the measurement accuracy.

[0034] The measurement system uses the principle of optical triangulation. The 8 optical centers of the linear CCD camera, the optical center of the linear structured light, and the intersection of the ...

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Abstract

The invention provides a non-contact measurement method for sizes of forged pieces. According to the non-contact measurement method, feature points are scanned and acquired through cooperation of a linear array CCD and linear structured light, three-dimensional coordinates of the feature points are deduced and three-dimensional modeling are performed on the basis of the optical triangle principle, and thus information such as sizes of the forged pieces is obtained through analysis. Through the measurement device and method, the system resolution is improved, the system measurement range is widened, the problem of target matching in binocular vision is avoided, and large-size three-dimensional high-precision measurement can be achieved.

Description

technical field [0001] The invention relates to a non-contact measurement method for the size of a forging, in particular to an online non-contact measurement method for the size of a forging based on a linear array CCD camera and a linear structured light projector. Background technique [0002] Large-scale forgings are the basic parts for the manufacture of major equipment, and their volume is huge. The measurement of geometric parameters is a problem of super-sized measurement under complex conditions. In the forging process, the traditional measurement method is to use a mechanical measuring tool and measure it manually. This measurement method is seriously affected by measuring tools and human factors, and the measurement error is large. In order to reduce the scrap rate, the method of increasing the forging allowance is often used, but the loss of the ingot material is increased. In addition, the impact of strong shock and vibration often exists in the forging product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G01B11/25
Inventor 朱炜李建丽田丽辛倩倩杨延竹陈能洁盛佳伟齐亮汤雪华马贺贺张茂松
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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