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Sheet metal microcrack recognizing and positioning system and detection method based on system

A metal sheet and positioning system technology, which is applied to the analysis of solids, instruments, and materials using sonic/ultrasonic/infrasonic waves. It can solve the problem of low detection and recognition ability of small cracks, and achieve the effect of simplifying the extraction method and avoiding complex analysis.

Inactive Publication Date: 2016-11-16
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a metal thin plate micro-crack identification and positioning system and a detection method based on the system, in order to solve the problem that the existing ultrasonic detection has a low ability to detect and identify micro-cracks in the thin plate medium, and at the same time avoid the ultrasonic sound beam on the plate. The application limitations brought about by the complex characteristics of medium propagation simplifies the extraction method of nonlinear characteristic parameters of ultrasonic waves in thin plate media, and uses the difference frequency nonlinear ultrasonic modulation spectrum technology to realize accurate identification of microcracks in thin plate structures

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  • Sheet metal microcrack recognizing and positioning system and detection method based on system
  • Sheet metal microcrack recognizing and positioning system and detection method based on system
  • Sheet metal microcrack recognizing and positioning system and detection method based on system

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specific Embodiment approach 1

[0022] Specific implementation mode 1. Combination figure 1 This specific embodiment is described. The metal thin plate microcrack identification and location system and the detection method based on the system described in this specific embodiment include two parts: a hardware system and a software system.

specific Embodiment approach 2

[0023] Specific embodiment two, combine figure 2 The difference between this embodiment and the metal sheet microcrack identification and positioning system described in Embodiment 1 and the detection method based on the system is that the hardware system includes a keyboard 1-1, a mouse 1-2, a printer 1- 3. Industrial computer 1-4, expansion station 1-5, position sensor probe 1-6, sound wave receiving / transmitting hardware module 1-7, piezoelectric transducer array 1-8, metal plate to be tested 1-9, It is composed of five data transmission lines, two sets of PCI peripheral parts interconnection standard data bus and USB universal serial bus. The industrial computer 1-4 is electrically connected to the expansion station through the PCI peripheral component interconnection standard data bus. The position sensor probes 1-6 are electrically connected to the expansion station through a USB universal serial bus. The sound wave receiving / transmitting hardware modules 1-7 are elec...

specific Embodiment approach 3

[0024] Specific embodiment three, combine figure 2 The difference between this specific embodiment and the metal thin plate microcrack identification and positioning system described in the second specific embodiment and the detection method based on this system is that the hardware system can be divided into position information collection and processing and acoustic wave information collection from the function. Dealing with hardware modules, but both structurally contain repetitive parts. The position information module mainly includes an industrial computer 1-4, an extension station, and a position sensor 1-6. The sound wave information collection and processing hardware module mainly includes industrial computer 1-4, expansion station, sound wave receiving / transmitting hardware module 1-7, and piezoelectric transducer array 1-8. The industrial control computer 1-4 controls the acoustic wave receiving / transmitting hardware module 1-7 and the position sensor probe 1-6 thr...

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Abstract

The invention relates to a micro-crack identification and positioning system for a thin metal plate and a detection method based on the system, relating to the field of non-destructive testing of a thin metal plate. It solves the problem of low accuracy of the existing ultrasonic identification of micro-cracks and the difficulty in extracting subsequent feature signals, and simplifies the extraction method of nonlinear acoustic feature parameters. The hardware system includes keyboard, mouse, printer, industrial computer, expansion station, position sensor probe, sound wave receiving / transmitting hardware module, piezoelectric transducer array, metal sheet to be tested, five data transmission lines, and two sets of PCI peripheral components Internet mark. The software system includes a system management module, an acoustic wave signal processing module, a position information processing module, a display output software module and a post-processing module. The software system is a set of real-time detection and control programs, which use data visualization technology to intuitively display and output the ultrasonic signal data during the test process and the analysis data of the micro-cracks of the metal plate. The invention is suitable for detecting micro-cracks in thin metal plates.

Description

technical field [0001] The invention relates to the field of non-destructive testing of thin metal plates, in particular to a micro-crack identification and positioning system for thin metal plates and a detection method based on the system. Background technique [0002] The metal sheet is formed through multiple rolling processes and a large amount of deformation, so the defects inside the ingot (such as pores and inclusions, etc.) are deformed into linear and layered cracks that are closely combined with the base metal, which makes the metal sheet Due to the complexity of the working environment during use, such as aircraft skins, fatigue cracks often occur on some thin plate components, which will pose a great threat to the safe service of the aircraft. Therefore, the study of micro-crack detection methods for metal sheets, especially the testing methods that can accurately identify micro-cracks, has attracted more attention. [0003] The existing ultrasonic non-destruct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
CPCG01N29/04G01N2291/0237G01N2291/105
Inventor 高桂丽石德全董静薇李大勇
Owner HARBIN UNIV OF SCI & TECH
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