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Lead ice monitoring method and system based on three-dimensional reconstruction

A technology for three-dimensional reconstruction and monitoring systems, applied in signal transmission systems, measuring devices, surveying and mapping, and navigation, etc., can solve problems such as inaccurate calculations

Inactive Publication Date: 2014-02-26
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

These methods either require manual on-site inspection, or the calculation is inaccurate

Method used

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  • Lead ice monitoring method and system based on three-dimensional reconstruction
  • Lead ice monitoring method and system based on three-dimensional reconstruction
  • Lead ice monitoring method and system based on three-dimensional reconstruction

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Embodiment Construction

[0028] like figure 1 As shown, the present invention uses optical imaging combined with image three-dimensional reconstruction technology to realize the measurement of icing on transmission wires. The cameras are arranged in a position where the optical axes are parallel up and down and the baselines are collinear, which not only makes it easy to obtain parallax in the vertical direction, but also simplifies subsequent processing; Stereo vision method, the ice-covered images of the same section of the line are obtained by two cameras from different angles, so that the same point on the ice-covered line presents different visual positions in the two images, and then the two images are obtained according to the imaging principle of the camera. The geometric relationship between the image points, and then calculate the three-dimensional coordinates of the point, and reconstruct the three-dimensional model of the line ice by obtaining the three-dimensional data of a large number o...

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Abstract

The invention discloses a lead ice monitoring method and system based on three-dimensional reconstruction. The lead ice monitoring method comprises the steps: 1, installing two cameras which are different in position and have a certain angle for imaging a lead to be monitored, obtaining a boundary contour of the lead to be monitored; 2, acquiring ice images of the lead to be monitored, shot under the ice condition; 3, processing the ice images of the two cameras, which are obtained from the same section of line from different angles, to ensure that image points of the same point on an ice line in two images show different vision positions, obtaining a geometrical relationship between the two image points according to a camera imaging principle, and further figuring out three-dimensional coordinates of this point; 4, reconstructing a three-dimensional mode of line icing through acquiring the data of the three-dimensional coordinates of a large quantity of characteristic points; and 5, comparing the three-dimensional mode of the line icing with the boundary contour of the lead to be monitored, and figuring out an ice thickness. The invention provides a lead ice monitoring method and system based on three-dimensional reconstruction, which are capable of carrying out remote real-time monitoring on ice.

Description

technical field [0001] The invention belongs to the technical field of on-line icing monitoring of power systems, and relates to a wire icing monitoring method and system, in particular to a wire icing monitoring method and system based on three-dimensional reconstruction. technical background [0002] In power transmission and transformation systems, the phenomenon of icing on transmission lines is very common. Icing can cause major accidents such as conductor galloping, tower tilt, pole (tower), wire breakage, and insulator flashover, which seriously threaten the safe operation of the power system. Carrying out research on icing on-line monitoring technology and predicting the thickness of icing within a certain period of time based on the detection results will have positive significance and practical value for improving the safe operation of power systems. [0003] At present, monitoring the real-time status and severity of icing on transmission lines mainly relies on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/00G08C17/02H02J13/00
CPCG01B11/03
Inventor 曹世康李东坚董晓娜王伟蔺辉张伟刚
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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