Method and system for detecting wall shape variation and building

A change detection and wall technology, applied in the field of safety detection, can solve problems such as the difficulty of early warning of hidden dangers of deformation, and achieve the effect of realizing building safety early warning, reducing structural damage and reducing losses.

Inactive Publication Date: 2014-02-26
CHINA SECURITY & FIRE TECH GRP
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Problems solved by technology

[0003] In view of this, it is necessary to provide a fast and flexible detection method for the shape change of the wall, which can detect and analyze the slight twist and split information on the reinfor

Method used

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  • Method and system for detecting wall shape variation and building
  • Method and system for detecting wall shape variation and building
  • Method and system for detecting wall shape variation and building

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Embodiment approach

[0061] In the embodiment of the present invention, the axial strain sensitivity formula is:

[0062] (Δλ / λ)=(1–P)C; where λ is the center wavelength of the fiber grating, C is the dielectric constant, and -P is the stress.

[0063] And the central wavelength of the fiber Bragg grating λ=2nΛ; wherein, n is the effective refractive index, and Λ is the period of the fiber Bragg grating.

[0064] Since the axial stress and the tensile strength are the relationship between the action force and the reaction force, the axial stress-P of each test point can be calculated according to the axial strain sensitivity formula and the derived wavelength change Δλ, so as to obtain the of tensile strength.

[0065] Figure 6 Shown is a schematic structural diagram of the wall shape change detection system 1 of the present invention, which includes a deployment module 11 , a model building module 12 , a calculation module 13 and an analysis module 14 .

[0066] The deployment module 11 is us...

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Abstract

Provided is a method for detecting wall shape variation. The method comprises the steps that at least two sensor elements and an optical fiber tension adjusting device are arranged on the upper portion of a main structure of a building to be monitored to form testing points; a building model is built according to the building to be monitored, and the testing points are connected with the built building model through an optical fiber server; the attribute variation of the arranged sensor elements is analyzed according to the optical fiber sever to obtain corresponding optical variable data, and the tension strength of all testing points on the main structure of the building to be monitored is calculated; the variation of the calculated tension strength of each testing point is analyzed, and variation corresponding to a wall shape is described on the building model according to a analysis result. According to the method for detecting wall shape variation, a sensing technology is used, trace distorted split information on a wall is detected and analyzed, the hidden danger of the building is output quickly and flexibly, and the problem that early warning of deformation hidden dangers is difficult to give out to an existing large-scale building reinforced wall structure is solved. In addition, the invention further provides a system for detecting wall shape variation and the building.

Description

technical field [0001] The invention relates to safety detection technology, in particular to a method and system for detecting changes in the shape of a wall and a building thereof. Background technique [0002] In reality, many large buildings, such as large reservoir dams, large office buildings, expressway overpasses and multi-storey overpasses in urban areas, etc., have strict national standards for quality control during the construction process, and Before these buildings are put into use, they will undergo strict quality inspection and inspection, and they can be put into use after passing the test. However, once these buildings are put into use, the main structure of the building is often caused by non-human damage factors such as natural disasters and sudden changes in external forces during use, such as the change of the bearing capacity of the main structure of the bridge due to continuous rain and water loss. Deformation of a certain main structure; due to the ...

Claims

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Application Information

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IPC IPC(8): G01B11/16
Inventor 邬志刚燕晋春
Owner CHINA SECURITY & FIRE TECH GRP
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