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High-rise structure dynamic displacement monitoring method based on digital image

A high-level structure and digital image technology, applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problems that manual measurement methods are not suitable for long-term monitoring of structures and fail to meet monitoring requirements

Inactive Publication Date: 2014-01-15
刘肖琳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Clearly, manual measurement methods are not suitable for long-term monitoring of structures
At present, the accuracy of the main automatic measurement methods is generally on the order of centimeters, which cannot meet the monitoring requirements.

Method used

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  • High-rise structure dynamic displacement monitoring method based on digital image
  • High-rise structure dynamic displacement monitoring method based on digital image
  • High-rise structure dynamic displacement monitoring method based on digital image

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A method for monitoring dynamic displacement of high-rise structures based on digital images, including an image acquisition system and a data analysis system; such as figure 1 As shown, the image acquisition system is installed on the measurement point of the structure to be monitored, and its lens faces the ground, and the angle between the lens direction and the vertical direction is θ, and the image data of the ground is collected; the data analysis system is based on the collected The ground image data calculates the translational displacement and the torsion angle of the structure measurement point; the calculation process of the data analysis system is as follows:

[0059] 1) if figure 1 As shown, for a high-rise structure with a height of H, the measured distance from the ground is h, such as figure 2 As shown, the cross-sectional length of the monitoring structure is L, and the width is W. A rectangular coordinate system is established with the center point O...

Embodiment 2

[0088] A method for monitoring dynamic displacement of high-rise structures based on digital images, including an image acquisition system and a data analysis system; such as figure 1 As shown, the image acquisition system is installed on the measurement point of the structure to be monitored, and its lens faces the ground, the angle between the lens direction and the vertical direction is θ, and the angle θ between the lens direction and the vertical direction is 5 °. Collect the image data of the ground; the data analysis system calculates the translational displacement and the torsion angle of the structure measuring point according to the collected ground image data; the calculation process of the data analysis system is as follows:

[0089] 1) if figure 1 As shown, for a high-rise structure with a height of H, the measured distance from the ground is h, such as figure 2 As shown, the cross-sectional length of the monitoring structure is L, and the width is W. A rectang...

Embodiment 3

[0118] The precision analysis of a kind of high-rise structure dynamic displacement monitoring method based on digital image of the present invention:

[0119] The extraction accuracy of the center position of the feature point on the image is set to δ pixel, because the significance of this problem is only the relative position of different feature points in the same image and the same feature point in different images, and each image Therefore, when the template correlation method is used for precise positioning, the measurement accuracy of the relative position between feature points is better than the extraction accuracy of a single position.

[0120] let l TB and l LR is m pixels, L TB and L LR is M mm, and the deviation of the actual spacing of each feature point is Δ mm, then the estimated error value of the measurement result is:

[0121]

[0122] Since m>>δ, M>>Δ, if the camera is stable enough and the environmental conditions are good (good picture quality, st...

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Abstract

The invention belongs to the technical field of displacement monitoring, and particularly provides a high-rise structure dynamic displacement monitoring method based on a digital image, which includes an image collecting system and a data analyzing system, wherein the image collecting system is mounted on a measuring point of a to-be-monitored building with a lens of the image collecting system facing toward the ground, the included angle between the lens direction and the vertical direction is theta, and the image collecting system is used for collecting the ground image data; and the data analyzing system calculates the translational displacement and the torsion angle of the measuring point of the building according to the collected ground image data. The method can perform long-time, highly-precise, real-time and automatic monitoring of the dynamic displacement of the high-rise structure, and has the advantages of convenience for mounting and simplicity for popularization and application.

Description

technical field [0001] The invention relates to a displacement monitoring method, in particular to a dynamic displacement monitoring method for high-rise structures. Background technique [0002] The so-called deformation monitoring is to use special instruments and equipment to measure the deformation of buildings (structures) and their foundations over time under the action of external forces on the buildings (structures). Deformation monitoring includes two parts, internal monitoring and external monitoring. Internal monitoring is mainly to monitor the internal stress and temperature changes of buildings (structures), as well as the determination of dynamic characteristics and acceleration. External monitoring is mainly for settlement, displacement observation, tilt observation, crack observation, deflection observation, etc. of buildings (structures). [0003] Deformation monitoring can be divided into static and dynamic according to the state of structural deformation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/16G01B11/02G01B11/26
Inventor 刘肖琳谭湘倩
Owner 刘肖琳
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