Glass curtain wall stress detection method

A glass curtain wall, stress detection technology, applied in the direction of measuring force, measuring device, and force measurement by measuring the change of optical properties of materials when they are stressed, which can solve the problem of poor contrast of stress fringe images during the day, and detection can only be carried out at night. , the stress extraction process is complex and other problems, to reduce interference, improve accuracy and improve efficiency.

Active Publication Date: 2021-06-22
BEIHANG UNIV
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Problems solved by technology

[0004] (1) Due to the laying of guide rails or artificial hanging baskets on the outside of the curtain wall, the detection cost is increased and the detection efficiency is low;
[0005] (2) Since the above-mentioned patent uses traditional photoelastic fringes as the information carrier, the contrast of the str...

Method used

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  • Glass curtain wall stress detection method
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Embodiment Construction

[0041] In order to make those skilled in the art understand the core idea of ​​the present invention more clearly, it will be described in detail below with reference to the accompanying drawings.

[0042] A glass curtain wall stress detection method, the specific process is as follows Figure 4 shown.

[0043] It mainly includes: using the principle of reflection photoelasticity for preliminary qualitative detection to determine the stress concentration area of ​​the glass curtain wall, and then using the principle of transmission photoelasticity to perform accurate quantitative stress detection on the stress concentration area.

[0044] Specifically, the following steps are included:

[0045] Step 1, use the UAV equipped with a pixel polarization camera and a circularly polarized light source to scan each area of ​​the glass curtain wall to be inspected block by block, and obtain the reflective photoelastic fringe image of each area.

[0046] Use the UAV equipped with a pi...

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Abstract

The invention relates to the technical field of material nondestructive testing, and provides a glass curtain wall stress detection method which mainly utilizes an air flying device to carry a pixel polarization camera to carry out block-by-block scanning on the outer side of the target area of a to-be-detected glass curtain wall, and obtains polarization images of the to-be-detected glass curtain wall in four directions at the same time; a circular polarization light source is mounted on the inner side of the target area; and the data processing device receives the transmission method photoelastic fringe image sent by the air flight device, processes the transmission method photoelastic fringe image to obtain a DoLP field distribution image and an AOP field distribution image of the target area, and calculates the stress value of the glass curtain wall of the target area according to the DoLP and the AOP. According to the method, the residual stress field in the target detection area can be obtained only through one-time photographing, and the detection efficiency is improved; the detection sensitivity is improved, the ambient light interference resistance of the system is enhanced, and the problem that photoelastic stripe images are poor in contrast in the daytime and can only be detected at night is solved.

Description

technical field [0001] The invention relates to the technical field of material non-destructive testing, in particular to a stress testing method for a glass curtain wall. Background technique [0002] As a unique design in modern architecture, glass curtain wall not only embodies the best combination of architecture and aesthetic structure design, but also perfectly reflects the multiple functions of glass. The accident that causes the most safety problems of glass curtain walls is the self-explosion of tempered glass. The residual stress in the glass curtain wall, the installation stress and the stress under the wind load are the important reasons for the self-explosion of the glass curtain wall. Therefore, the stress detection in the glass curtain wall is an important measure to ensure its safety and prevent accidents. [0003] At present, the stress detection of glass curtain walls mostly adopts the principle of photoelasticity, but the detection method adopts the trad...

Claims

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Application Information

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IPC IPC(8): G01L1/24
CPCG01L1/241
Inventor 苏飞
Owner BEIHANG UNIV
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