Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for investigating failure connection of engineering structure by signal focus

A technology for connecting failures and engineering structures, which is applied in the processing of detection response signals and the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc. It can solve problems such as monitoring and complexity of connection conditions that are difficult to structure, and achieve improved sensitivity and simple implementation methods Effect

Active Publication Date: 2007-07-18
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the structural connection monitoring of the structural connection of the aircraft is a very important part of the structural health monitoring, and the working and monitoring environments of the aircraft are generally more complicated. When the structure is excited by sound waves, the above-mentioned problems must exist in the sensing signal , it is difficult to effectively monitor the connection of the structure

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
  • Method for investigating failure connection of engineering structure by signal focus
  • Method for investigating failure connection of engineering structure by signal focus
  • Method for investigating failure connection of engineering structure by signal focus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] As shown in FIG. 5 , the method for monitoring engineering structure connection failures using signal focusing in this embodiment includes the following steps:

[0026] (1) Acquisition of structural response signals:

[0027] According to the monitoring content and area, a certain number of piezoelectric elements are arranged in the structure to form a sensing / excitation array, and the set signal is loaded to the selected piezoelectric excitation element through the function generator and power amplifier, and the excitation is excited in the structure Signal. When the first signal acquisition method is adopted, another selected piezoelectric element is used as the sensor, and the structural response signal is collected to the control computer through the amplification of the charge amplifier; when the self-sensing excitation technology is adopted, a bridge is built on the excitation element Amplified by the voltage follower and voltage amplifier, the structural respons...

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 method used signal focalizing to monitor engineering structure connecting failure. It includes the following steps: collecting structure response signal; time inversion processing; sensing signal focalizing; characteristic parameter extracting and structure health identifying. It can increase sensitivity for the structure connecting failure monitoring method based on acoustic excitation, be good for the practicality of the technique, and actualized method.

Description

1. Technical field [0001] The invention relates to a method for monitoring engineering structures, in particular to a method for monitoring connection failures of plate engineering structures. 2. Background technology [0002] With the continuous improvement of structural safety and reliability requirements, the on-line monitoring and diagnosis of structural damage has attracted people's attention. The connection part of the structure is a part prone to connection failure. In order to prevent the disaster or loss caused by the structure damage, the structure must be effectively monitored. [0003] When the structure is damaged, defective or the geometric characteristics change, its center frequency will change accordingly. At this time, the response of the structure will also change correspondingly under the same excitation. According to this principle, the health status of the structure can be monitored. monitor. The connection failure of the plate structure is a typical ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/11G01N29/44
Inventor 袁慎芳王强邱雷吴键余振华
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com