Large portal crane beam deformation measuring method based on image and geometric contour

A technology of gantry cranes and crane girders, which is applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problems of long measurement time, difficulty in matching points with the same name, lack of texture features, etc., and achieve the effect of high measurement accuracy
CN109764822AInactive Publication Date: 2019-05-17WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2019-05-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a large portal crane beam deformation measuring method based on an image and a geometric contour. The method comprises the following steps of firstly, acquiring different contour lines of a crane beam to obtain sequence image data; carrying out data preprocessing, and extracting the contour lines of the crane beam in the image; computing initial values of the length, the width and the center coordinates of a rectangular cross section of the crane beam; selecting a corresponding photo from a photo sequence through the transverse length of the given crane beam; carrying out iterative computation to obtain the length, the width and the center coordinates of a transverse section of the crane beam; and finally, carrying out subsequent analysis and decision-making on theobtained data. The method is low in requirement for personnel for field measurement, and does not need to have a relatively high skill requirement for field measurement like a traditional measuring method, and a relatively high measurement precision is kept for a long time; and the method is obtained by strict mathematical calculation, so that the whole process is stricter.
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Description

technical field

[0001] The invention belongs to the technical field of engineering measurement and relates to a method for accurately monitoring the deformation of a beam of a large gantry crane, in particular to a method for measuring the deformation of a beam of a large gantry crane based on an image and a geometric profile. Background technique

[0002] With the continuous improvement of my country's industrialization level, the manufacturing capacity of large-scale equipment has been rapidly improved. The large-scale gantry crane is one of the essential equipment in the large-scale equipment manufacturing process, which is of great significance to industrial production. Gantry crane is a common crane built on a gantry, mainly used for hoisting and handling of large objects, such as in shipyards and ports. If the main beam of the gantry crane breaks during the hoisting operation, it may cause inestimable losses to people's lives and property. In order to ensure the safe...

Claims

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