A method for detecting stress of glass curtain wall

Abstract

The present invention relates to the technical field of material non-destructive testing, and provides a glass curtain wall stress detection method, which mainly uses a pixel polarization camera mounted on an aerial flight device to scan block by block outside the target area of ​​the glass curtain wall to be inspected, and simultaneously obtains four The polarized image of the direction, the inner side of the target area is equipped with a circularly polarized light source; the data processing device receives the transmission method photoelastic fringe image sent by the aerial flight device, and processes the transmission method photoelastic fringe image to obtain the linear polarization degree of the target area ( DoLP) field distribution image and principal stress direction (AOP) field distribution image, and calculate the glass curtain wall stress value in the target area according to DoLP and AOP. The invention only needs to take one photo to obtain the residual stress field in the target detection area, which improves the detection efficiency; improves the detection sensitivity and enhances the ability of the system to resist environmental light interference, and solves the problem of poor contrast of photoelastic fringe images during the daytime. A problem that can be detected at night.

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...

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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 stress fringe image is poor during the day, so the detection can usually only be carried out at night;

[0006] (3) The traditional oblique reflection photoelastic method requires photoelastic fringe fields incident in two directions to completely determine the stress field, so the stress extraction process is complicated

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