Detection and evaluation method of glass curtain wall structural adhesive bonding strength

An evaluation method and technology of glass curtain wall, applied in measurement devices, generation of ultrasonic/sonic/infrasonic waves, analysis of solids using sonic/ultrasonic/infrasonic waves, etc. Layout inspection, realize lightweight, and achieve the effect of simplification

Active Publication Date: 2017-12-01
SOUTH CHINA UNIV OF TECH
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the performance of the silicone structural adhesive cannot be guar

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Detection and evaluation method of glass curtain wall structural adhesive bonding strength
  • Detection and evaluation method of glass curtain wall structural adhesive bonding strength
  • Detection and evaluation method of glass curtain wall structural adhesive bonding strength

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0031] Such as figure 1 As shown, a method for detecting and evaluating the bonding strength of glass curtain wall structural adhesives includes the following steps:

[0032] Step 1. According to the frequency response result and the group velocity of the dispersion curve, select appropriate high frequency and low frequency frequencies to form the acoustic modulation excitation signal;

[0033] Using the dispersion curve calculation software to obtain the theoretical dispersion curve of the glass plate as follows image 3 shown; according to the frequency response results shown in Figure 4 (a) and Figure 4 (b), select high-frequency and low-frequency frequencies to form the acoustic modulation excitation signal.

[0034] In step 2, the low-frequency vibration excitation and the high-frequency vibration excitation are sent separately by means of double exciters, so that the high-frequency excitation and low-frequency excitation reach the bonding interface at the same time, and...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a detection and evaluation method of glass curtain wall structural adhesive bonding strength. The method comprises the following steps of first, determining frequencies of a high frequency signal and a low frequency signal according to a group speed and frequency response of a glass panel dispersion curve, and forming sound modulation excitation signals; second, sending a low frequency vibration excitation signal and a high frequency vibration excitation signal in a dual-vibrator way, so as to enable high and low frequency excitation signals to reach a bonding interface simultaneously, and receiving a nonlinear signal of the bonding interface through a reflection manner; third, decomposing the nonlinear signal by using an empirical mode, and acquiring a characteristic signal sent out by the bonding interface of the glass and the structural adhesive; fourth, analyzing a power spectrum of the characteristic signal, obtaining a nonlinear coefficient of the characteristic signal, and resolving an energy value of the characteristic signal by using a wavelet energy method; and fifth, obtaining bonding strength levels of the glass curtain wall structural adhesive and the glass according to the nonlinear coefficient and energy value of the bonding interface. The method makes detection simplified and light weight.

Description

technical field [0001] The invention relates to an online non-destructive testing technology, in particular to a testing and evaluating method for bonding strength of glass curtain wall structural adhesives. Background technique [0002] my country's building curtain wall industry is developing rapidly. By the end of 2014, the cumulative output of building curtain walls reached 1.033 billion square meters, and China's existing glass curtain walls accounted for more than 85% of the global total. As the glass curtain wall is used for a long time, the various performances of the curtain wall glass are constantly declining and declining, and the glass curtain walls currently in use generally have various safety hazards. In recent years, safety accidents caused by glass breakage and falling off have been frequently reported in newspapers, and the safety of curtain wall glass has attracted people's attention. Especially the hidden frame glass curtain wall, because the hidden fram...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N29/04G01N29/34G01N29/11
CPCG01N29/041G01N29/11G01N29/34G01N2291/0427
Inventor 洪晓斌林沛嵩许维蓥
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap