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Multi-reflection inhibiting method in in-situ measurement of high reflection metal structural component

A technology for metal structural parts and reflection suppression, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of improving the difficulty of strong reflective metal structural parts and difficult control of ambient light interference, so as to improve feasibility and practicability. Ensure correctness and practicality, and solve measurement problems

Inactive Publication Date: 2012-10-10
BEIHANG UNIV
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Problems solved by technology

Moreover, in the on-site measurement environment, ambient light interference is not easy to control, and the measurement system must be able to adapt to the requirements of on-site ambient light, which greatly increases the difficulty of in-situ measurement of highly reflective metal structures

Method used

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  • Multi-reflection inhibiting method in in-situ measurement of high reflection metal structural component
  • Multi-reflection inhibiting method in in-situ measurement of high reflection metal structural component
  • Multi-reflection inhibiting method in in-situ measurement of high reflection metal structural component

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Embodiment Construction

[0032] In order to better understand the present invention, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] Refer to attached figure 1 , a method for suppressing multiple reflections in in-situ measurement of a highly reflective metal structure, comprising the following steps:

[0034] Before the in-situ measurement of highly reflective metal structures, the measurement system needs to carry out pre-measurement preparations, including debugging measurement software, projectors, etc.;

[0035] Step 1: Use the camera calibration algorithm based on the planar target to calibrate the internal parameters of the left camera, right camera and projector, and calibrate the external parameters between the left camera and the right camera and the external parameters between the left camera and the projector.

[0036] First place the plane target in front of the projector and the ca...

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Abstract

The invention provides a multi-reflection inhibiting method in in-situ measurement of a high reflection metal structural component. With the adoption of the method, the in-situ measurement of the high reflection metal structural component is achieved. The method comprises eight major steps. The method specially comprises the steps of: firstly, calibrating a left camera, a right camera and a projector; secondly, calculating the relative position of the projector and a workpiece coordinate systems by using the parameters provided by an in-situ measuring machine; thirdly, measuring and planning based on the normal direction of each face of a model of a part (Computer-Aided Design); fourthly, projecting the points to be measured on the workpiece on a digital projector, and selectively projecting after determining an area required for projecting; and fifthly, calculating the phases of pictures from the cameras so as to complete the three-dimensional reproduction of an object. The multi-reflection inhibiting method has the advantages of fast speed, high precision, and dense three-dimensional point cloud and the like, and moreover, the multi-reflection inhibiting method achieves the full-automatic in-situ measurement without manual intervention, has high operability, and can meet the requirement on in-situ quick measurement of the field strong reflection metal structural component.

Description

technical field [0001] The invention relates to a method for suppressing multiple reflections in the on-site measurement of a strong reflective metal structure. The method can be used in the on-site measurement of the strong reflective metal structure. The invention belongs to the technical field of machine vision. Background technique [0002] Large metal structural parts are widely used in high-end equipment manufacturing fields such as aviation, aerospace, ships, and automobiles, and their machining accuracy plays an important role in the performance of equipment. The material of traditional metal overall structural parts is mainly aluminum alloy or titanium alloy. After precision milling, the surface of the structural parts is extremely smooth, and strong reflections will appear, which makes the existing commercial optical 3D vision measuring instruments invalid, and cannot correctly measure strong reflections such as metals. The three-dimensional shape of the surface. ...

Claims

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Application Information

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IPC IPC(8): G01B11/24
Inventor 赵慧洁姜宏志孙健
Owner BEIHANG UNIV
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