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An active scanning and receiving high-resolution pulsed ultrasound-acoustic emission detection method

A technology of acoustic emission detection and pulsed ultrasound, which is applied in the fields of material analysis using acoustic wave emission technology, solid analysis using sound wave/ultrasonic wave/infrasonic wave, material analysis using sound wave/ultrasonic wave/infrasonic wave, etc. It can solve the problem of difficult to achieve high-resolution scanning Problems such as imaging detection, low-resolution defect detection ability, large thickness and pore detection difficulties, etc., to achieve the effect of automatic scanning detection and imaging analysis, easy automatic scanning detection, and insensitive defect orientation

Active Publication Date: 2021-05-07
AVIC BASIC TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose an active scanning and receiving type high-resolution pulsed ultrasonic-acoustic emission detection method for non-destructive testing of composite materials and metal material parts, which overcomes the influence of defect orientation in traditional ultrasonic testing, which is easy to cause missing inspections and large thickness. It solves the shortcomings of traditional ultrasonic-acoustic emission detection methods such as low resolution, limited defect detection ability, and difficulty in high-resolution scanning imaging detection and quantitative analysis of defects.

Method used

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  • An active scanning and receiving high-resolution pulsed ultrasound-acoustic emission detection method

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Embodiment 1

[0059] Using an active scanning and receiving type high-resolution pulsed ultrasonic-acoustic emission detection method and detection steps in the present invention, manual scanning and automatic scanning methods are selected, and the transmitting transducer 1 and receiving transducer 3 are made of AVIC composite materials. The AU-1 series transducer and CUS-21J produced by the responsible company are used as a scanning detection system, which are located on the same side of the part to be tested. Different frequency combinations of 2MHz, 5MHz, and 10MHz are selected, and the transmitting transducer 1 and receiving transducer 3 are used. The combination of the combination realizes the auxiliary scanning, and then realizes the active scanning and receiving of the acoustic emission signal from the defect. The 5mm and 10mm thick carbon fiber composite parts, the 3mm thick silicon carbide composite material, and the 5mm and 12mm thick aluminum alloy friction stir welding parts are r...

Embodiment 2

[0061] Adopt an active scanning and receiving type high-resolution pulsed ultrasonic-acoustic emission detection method and detection steps in the present invention, select a dual-channel automatic scanning mode, and use the AVIC Composite Materials Co., Ltd. for the transmitting transducer 1 and receiving transducer 3 The AU-1 series transducers produced, MUI-21 and CUS-21J are used as scanning detection systems, and different frequency combinations of 1MHz, 2MHz, and 5MHz are selected to realize auxiliary scanning through the combination of transmitting transducer 1 and receiving transducer 3 , and then realize the active scanning and receiving of the acoustic emission signal from the defect. A series of actual detection applications have been carried out on 20mm and 50mm carbon fiber composite parts respectively. The application results show that the scanning imaging effect is very good, and the detection resolution and surface detection blind area can reach The thickness of...

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Abstract

The invention belongs to non-destructive testing technology, and relates to a composite material structure and non-destructive testing of metal materials used in the fields of aviation, aerospace, weapons, ships, metallurgy, steel, transportation, construction, etc., and especially relates to an active scanning receiving type high-resolution pulse Ultrasonic-Acoustic Emission Testing Method. The first line of the present invention adopts the advanced auxiliary scanning of the receiving transducer, and then analyzes the active scanning reception and signal display of the pulse acoustic emission wave, and then realizes the high-resolution pulse ultrasonic-acoustic emission detection of the detected parts. The invention does not require external mechanical loading on the detected parts or structures, and is suitable for detection of parts or structures under static conditions; the transducer does not need to be fixed on the surface of the detected parts or structures, and can realize automatic scanning detection And imaging analysis; the defect detection rate has nothing to do with the number and position of the arranged transducers, which overcomes the risk of missing detection in traditional acoustic emission.

Description

technical field [0001] The invention belongs to non-destructive testing technology, and relates to a composite material structure and non-destructive testing of metal materials used in the fields of aviation, aerospace, weapons, ships, metallurgy, steel, transportation, construction, etc., and especially relates to an active scanning receiving type high-resolution pulse Ultrasonic-acoustic emission detection method. Background technique [0002] Ultrasound is currently an important method widely used in the quantitative non-destructive testing of various materials and their structural defects. At present, 80% of composite material structures are tested by ultrasonic testing. At present, the ultrasonic inspection methods for parts or structures mainly include reflection method and penetration method. The external ultrasonic pulse sound source is used to detect and discriminate defects through the reflection / transmission sound wave behavior formed in the detected parts or str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/06G01N29/14
CPCG01N29/0609G01N29/069G01N29/14
Inventor 刘松平刘菲菲李乐刚李治应
Owner AVIC BASIC TECH RES INST
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