Structural vibration displacement measurement method and device based on red circular target image processing

A technology for structural vibration and image processing, applied in measurement devices, image data processing, image enhancement, etc., can solve the problems of low vibration displacement measurement accuracy and poor real-time performance, and reduce computational complexity, increase computational speed, and reduce interference. Effect
CN112233076AActive Publication Date: 2021-01-15SHIJIAZHUANG TIEDAO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHIJIAZHUANG TIEDAO UNIV
Publication Date
2021-01-15

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Abstract

The invention is suitable for the technical field of structural health monitoring, and provides a structural vibration displacement measurement method and device based on red circular target image processing, and the method comprises the steps of carrying out the video sequence decomposition of an obtained red circular target video, and obtaining each frame of image; separating the red circular target in each frame of image from the black square target to obtain a target pixel value; extracting the edge of the red circular target to obtain an edge pixel value; obtaining a circle center initialvalue and a radius initial value of the red circular target according to the target pixel value; filtering the edge pixel value according to the circle center initial value and the radius initial value; calculating a target circle center value and a target radius value of the red circular target according to the filtered edge pixel value; according to the target circle center value and the targetradius value obtained through calculation of the multiple frames of images and the measured actual radius value of the red circular target, obtaining the actual displacement change value of the red circular target through calculation, and therefore target positioning can be rapidly and accurately conducted.
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Description

technical field

[0001] The invention belongs to the technical field of structural health monitoring, and in particular relates to a method and device for measuring structural vibration displacement based on red circular target image processing. Background technique

[0002] Structural health monitoring generally measures the response of civil structures under external effects such as wind, earthquake or vehicle load, and the displacement response is the key to structural health monitoring. At present, the measurement techniques for displacement response mainly include direct method and indirect method. Among them, the direct method uses a displacement sensor to directly measure the structural vibration displacement. When using it, it needs to refer to the reference point and need to approach or touch the point to be measured. This contact direct measurement method has high cost, is not easy to install, and the structural vibration process The medium sensor is easily damaged...

Claims

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