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

Ultrasonic field non-contact visualization method for nondestructive inspection and device thereof

A non-destructive flaw detection and ultrasonic field technology, which is used in the analysis of solids using sonic/ultrasonic/infrasonic waves. It can solve the problems of high use and maintenance costs, expensive systems, complex and large systems, and improve reliability, efficiency, bandwidth and sensitivity. high effect

Inactive Publication Date: 2014-04-09
TONGJI UNIV
View PDF5 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current laser ultrasonic testing systems use high-power lasers. The systems are complex and expensive, and the cost of use and maintenance is high. There is no low-cost and portable system, so it has not been widely used in industry.

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
  • Ultrasonic field non-contact visualization method for nondestructive inspection and device thereof
  • Ultrasonic field non-contact visualization method for nondestructive inspection and device thereof
  • Ultrasonic field non-contact visualization method for nondestructive inspection and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] Embodiment: This example is the detection of surface defects on a thin aluminum plate with a thickness of 0.2 mm. The specific detection steps are:

[0031] (1) Place the thin aluminum plate in the effective area that the galvanometer scanning head can scan;

[0032] (2) Determine the detection area S of the thin aluminum plate through the red light indication of the galvanometer scanning head, and establish the detection area S as a model represented by the dot matrix M crossed by rows and columns through the computer, and then according to the detection requirements, through the sound field in the computer The visualization software sets the number of rows and columns of the lattice M to obtain sufficient spatial resolution, such as figure 2 shown;

[0033] (3) Select a certain point on the thin aluminum plate as the receiving point P for the laser interferometer to receive the ultrasonic sound signal;

[0034] (4) Starting from a certain point in the detection are...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to an ultrasonic field non-contact visualization method for nondestructive inspection and a device thereof. The method includes the steps: a to-be-detected object is placed in an effective area which can be scanned by a galvanometer scanning head; a detection area of the to-be-detected object is determined; a point on the to-be-detected object is selected as a receiving point for a laser interferometer to receive ultrasonic sound signals; a pulse laser instrument successively emits a pulse laser to each point in the detection area, so as to stimulate an ultrasonic wave at each point, and at the same time, the ultrasonic sound signals are received at the receiving point by the laser interferometer and are stored in a computer; according to a reciprocal theory, all-point sound signals which are transmitted to the detection area through stimulating the receiving point by the pulse laser instrument are obtained; and the each-point sound signal obtained by the computer corresponds to a position in the detection area model. Compared with the prior art, the method breaks through the bottleneck that a traditional ultrasonic probe needs to contact the to-be-detected object, achieves on-site nondestructive inspection, and has the advantages of high detection resolution, high bandwidth, high sensitivity and the like.

Description

technical field [0001] The invention relates to the technical field of laser ultrasonic detection, in particular to a non-contact visualization method and device for ultrasonic field for non-destructive flaw detection. Background technique [0002] With the continuous improvement of human living standards, the safety requirements for the environment, travel and industrial products are getting higher and higher. How to prevent the occurrence of catastrophic accidents such as nuclear power leaks, aircraft crashes, and explosions of high-temperature and high-pressure equipment is a reflection of a country's It is a comprehensive index of industrial level and management ability. Ultrasonic nondestructive testing is one of the indispensable and effective tools for national industrial progress because of its wide application range, strong penetrating ability, high resolution, low testing cost and harmless to people. Using computer image processing technology to present the sound f...

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): G01N29/06
Inventor 潘永东李立兵刘磊陈亘凌松
Owner TONGJI UNIV
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