Glass curtain wall stress detection method

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...

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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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