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Ultrasonic A scanning signal based defect three-dimensional reconstruction method

A three-dimensional reconstruction and defect technology, which is applied in processing the response signal of detection, using sonic/ultrasonic/infrasound for material analysis, measuring devices, etc., which can solve the problems of low automation and low scanning efficiency of ultrasonic nondestructive testing

Inactive Publication Date: 2017-12-12
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0007] In order to solve the problems of low automation and low scanning efficiency in the existing ultrasonic non-destructive testing, the present invention proposes a defect three-dimensional reconstruction method based on ultrasonic A-scan signals. The defect three-dimensional reconstruction method includes the following steps:

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  • Ultrasonic A scanning signal based defect three-dimensional reconstruction method
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  • Ultrasonic A scanning signal based defect three-dimensional reconstruction method

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Embodiment Construction

[0051] The following takes an aero-engine blade as an example of the detected workpiece, combined with the attached Figure 1-14 The three-dimensional reconstruction method of defects based on ultrasonic A-scan signals of the present invention is described in detail.

[0052] First, use ultrasonic testing to obtain defect echo information. The specific operations are as follows:

[0053] Such as figure 1 As shown in the figure, the manipulator 1 in the automated ultrasonic testing system for aero-engine blades is used to clamp the aero-engine blade 2, and the automated ultrasonic testing system is used to plan the scanning trajectory of the manipulator 1, so that the manipulator 1 drives the tested aero-engine blade 2 to complete the A-scan operation, and then obtain the A-scan echo information of the aeroengine blade 2. When the automated ultrasonic testing system plans the scanning trajectory of the manipulator 1, the surface of the aero-engine blade 2 to be detected is co...

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Abstract

The invention relates to the field of nondestructive inspection, in particular to a method for performing three-dimensional reconstruction on inspected defects through an ultrasonic A scanning signal information, and aims at solving the problems of low automation degree and low scanning and inspecting efficiency of conventional ultrasonic nondestructive inspection. The method comprises the following steps: performing A scanning operation on a detected workpiece through an automatic ultrasonic detecting system to obtain defect echo information in the detected workpiece by the A scanning operation; calculating the distance from a defect point in the defect to a corresponding incidence point; deriving a coordinate information calculating formula of mapping matrixes among different coordinate systems and the defect point based on the mapping relation between different coordinate systems in the automatic ultrasonic detecting system, and accordingly obtaining the coordinate information of the defect point in the defect; then performing fit reconstruction to obtain a three-dimensional model of the defect. With the adoption of the three-dimensional reconstruction method, the defect can be automatically detected; the detecting efficiency is high; the independence on the experience of detectors can be avoided; the reconstruction accuracy is high.

Description

technical field [0001] The invention relates to the field of non-destructive flaw detection, in particular to a method for three-dimensional reconstruction of detected defects by using ultrasonic A-scan signal information. Background technique [0002] Ultrasonic non-destructive testing is widely used in the field of non-destructive testing, but this non-destructive testing method has the following defects: [0003] 1. The scanning method mainly used in ultrasonic non-destructive testing is manual scanning, which has a low degree of automation, resulting in low scanning efficiency and possible missed inspections; [0004] 2. Ultrasonic non-destructive testing mainly uses A-type pulsed ultrasonic testing waves for flaw detection. The defect information obtained by scanning is a two-dimensional waveform diagram with only time and amplitude information. The defect information is presented in a single way and must rely on the work experience of the inspectors Judgment on defect...

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Application Information

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IPC IPC(8): G01N29/44
CPCG01N29/44G01N29/4472
Inventor 郭俊锋
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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