A Reconstruction Method of Unknown Defect Contour Based on Dual Spontaneous and Spontaneous Phased Array Probes
A phased array probe, self-sending and self-receiving technology, applied in the direction of processing detection response signals, instruments, measuring devices, etc., can solve problems such as difficulty in reconstruction of prior unknown defect contours, and achieve the effect of wide applicability
Active Publication Date: 2022-05-10
DALIAN UNIV OF TECH
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[0004] The present invention provides a method for reconstructing unknown defect contours based on dual spontaneous and self-receiving phased array probes. Acquisition, through the point-by-point implementation of model wave diffusion correction, time-lapse superposition and composite imaging in the inspected area, to achieve complete contour reconstruction and quantitative detection of area-type and volume-type defects
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[0034] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.
[0035] It should be understood that the appended drawings are not to scale, presenting a suitably simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the invention disclosed herein, including, for example, specific dimensions, orientations, locations and shapes will be determined in part by the particular intended application and use environment.
[0036] The unknown defect contour reconstruction method based on dual self-spontaneous and self-receiving phased array probes, the ultrasonic testing system used is as follows: figure 1 As shown, including phased array ultrasonic detector, phased array probe, inclined plexiglass wedge. The specific detection and processing steps are as follows:
[0037](a) The tested test blocks ar...
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Abstract
The invention discloses a reconstruction method of an unknown defect contour based on a dual self-generating and self-receiving phased array probe, which belongs to the technical field of nondestructive testing. This method uses a detection system consisting of a phased array ultrasonic detector, two phased array probes and matching wedges to collect full matrix signals from both sides of the area to be detected; for each reconstruction point, two sets of full matrix signals are The full-span mode with the largest sound path is selected for the diffusion correction of different mode waves; finally, the time-delay superposition process is implemented, and the mode waves with the strongest response on both sides are combined, so as to realize the contour reconstruction and quantitative detection of unknown defects. This method can reconstruct a priori unknown volume-type defects, as well as regular and irregular area-type defect contours. The defect feature identification is intuitive, and the quantitative detection accuracy is high, which has a good engineering application prospect.
Description
technical field [0001] The invention relates to a method for reconstructing an unknown defect contour based on a dual spontaneous self-receiving phased array probe, which belongs to the technical field of nondestructive testing. Background technique [0002] Structural defects mainly include area defects and volume defects. Among them, the stress concentration at the tip of the area-type defect represented by the crack is easy to expand and cause the component to break, which is the most harmful defect. Among the existing nondestructive testing methods, ray testing is not sensitive to area defects, and it is difficult to give defect depth information. In contrast, ultrasonic testing has higher sensitivity and penetration, and a larger detection range, which is suitable for the detection and quantification of area defects. [0003] With the development of various ultrasonic signal post-processing technologies, the identification and quantification of internal area defects a...
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IPC IPC(8): G01N29/06G01N29/24G01N29/44
CPCG01N29/0645G01N29/0681G01N29/069G01N29/24G01N29/44G01N29/4463G01N29/4454G01N2291/0289G01N2291/106
Inventor 金士杰林莉刘晨飞罗忠兵
Owner DALIAN UNIV OF TECH