Ultrasonic array composite imaging method for quantitative evaluation of plate structure cracks

A quantitative evaluation and ultrasonic array technology, applied in the use of ultrasonic/sonic/infrasonic waves, the use of sound waves/ultrasonic/infrasonic waves to analyze solids, measuring devices, etc., can solve problems such as the direction identification of defects that cannot be realized

Inactive Publication Date: 2015-06-24
BEIJING UNIV OF TECH
View PDF2 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method extends the ultrasonic array technology to the field of ultrasonic guided waves to realize defect imaging, which can realize defect imaging, but cannot realize defect direction recognition

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 array composite imaging method for quantitative evaluation of plate structure cracks
  • Ultrasonic array composite imaging method for quantitative evaluation of plate structure cracks
  • Ultrasonic array composite imaging method for quantitative evaluation of plate structure cracks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0051] The testing instruments in this example are a function generator, an oscilloscope and a linear array transducer. The center frequency of the linear array transducer used in the experiment is f=300kHz, the total number of array elements is N=8, the width of a single array element is a=6mm, the distance between the centers of two adjacent array elements is p=2mm, and the sound wave is in the test piece The propagating wave speed c=5300m / s, then the wavelength The detection object is an aluminum plate with a length and width of 1000mm and a thickness of 1mm.

[0052] The technical solution adopted in the present invention is an ultrasonic array composite imaging method for quantitative evaluation of plate structure cracks. The specific steps are:

[0053] Step 1: In such as figure 1 The experiment is carried out under the detection dev...

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 array composite imaging method for the quantitative evaluation of plate structure cracks and belongs to the field of nondestructive detection. By carrying out omnifocal imaging and polarity-coherence imaging on a Lamb wave signal which is received by an ultrasonic transducer array, integrating the omnifocal imaging technology with the polarity-coherence imaging technology to obtain a composite imaging technology, carrying out omnifocal vector imaging on the basis of omnifocal imaging, determining the positions of defects according to the energy intensity of a reflected characteristic signal, and calculating the directions of the defects according to the directions of vectors in a vector graph, the directions of cracks can be identified effectively.

Description

technical field [0001] The invention relates to an ultrasonic array composite imaging method for quantitative evaluation of plate structure cracks, the method relates to the direction recognition technology of crack defects, and belongs to the technical field of non-destructive testing. Background technique [0002] Plate structure is one of the most commonly used structural forms in industry, and is widely used to manufacture various containers, furnace shells, furnace plates, and bridges. In use, the plate structure is often required to withstand dynamic loads, impacts, vibrations, corrosion resistance, etc., and cracks are prone to defects. For example, during the operation of thermal power plants and nuclear power plants, steam turbine blades work in harsh environments such as high temperature, high pressure, high speed or wet steam areas, and are subjected to centrifugal force, steam force, corrosion and vibration, and high-speed water droplet erosion in wet steam areas...

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): G01N29/06G01B17/00
Inventor 焦敬品杜礼杨素方何存富吴斌
Owner BEIJING 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