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Phased array ultrasound detecting scanning path optimizing method based on defect detection rate

A defect detection rate and ultrasonic detection technology, which is applied in the direction of material analysis, measuring devices, and instruments using sound waves/ultrasonic waves/infrasonic waves, can solve the problems of difficult balance between detection ability and detection efficiency, expand the scanning range, etc., and achieve reduction The workload of data collection and data analysis, the effect of improving detection efficiency and simplifying process design

Active Publication Date: 2013-06-12
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Problems solved by technology

However, for the detection of complex spatial structures, in order to reduce the possibility of missed detection, the scanning range is blindly expanded, and the efficiency of ultrasonic detection is reduced, so there has always been a problem that it is difficult to balance the detection ability and detection efficiency.

Method used

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  • Phased array ultrasound detecting scanning path optimizing method based on defect detection rate
  • Phased array ultrasound detecting scanning path optimizing method based on defect detection rate
  • Phased array ultrasound detecting scanning path optimizing method based on defect detection rate

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Embodiment Construction

[0042] figure 1 Schematic diagram of the welded joints of the key components of the hydropower generating set. As shown in the figure, it is usually a three-dimensional variable section structure, including a vertical web d and two transverse flanges. Each section along the web d can be approximated as a T-shaped structure, but the webs between each section The thickness of d and the angle between the web d and the flange are different.

[0043] The implementation process of a method for optimizing the scanning path of phased array ultrasonic detection based on the defect detection rate of the method of the present invention will be described in detail below in conjunction with the accompanying drawings:

[0044] S1 establishes a three-dimensional coordinate system according to the geometric shape of the joint, the distribution characteristics of the position prone to defects, and the scanning direction of the probe on the joint, and divides the joint into N detection areas a...

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Abstract

A phased array ultrasound detecting scanning path optimizing method based on defect detection rate comprises the following steps of dividing a workpiece to be detected into detection areas with the number of N according to distribution characteristics of the positions of defects-easy-to-appear of the workpiece to be detected, enabling thicknesses of detection blocks Fi (i is smaller than or equal to N) to be approximate; S2 of searching for an optimal scanning point of an ultra sound canning probe on each detection block; and S3 of obtaining an optimal scanning path by connecting the optimal scanning points on the detection blocks. The phased array ultrasound detecting scanning path optimizing method based on the defect detection rate can optimize a two-dimensional scanning range in a conventional method to be a scanning line, a walking path of the probe is greatly shortened, working load of data acquisition and data analysis is reduced, and detection efficiency is improved.

Description

technical field [0001] The invention relates to an optimization method for ultrasonic detection scanning path, which is especially suitable for automatic ultrasonic detection of three-dimensional variable cross-sections of in-service structural parts in limited space. Background technique [0002] Ultrasonic testing is widely used in quality control and safety testing of industrial equipment such as aerospace, water conservancy, and nuclear power plants because of its sensitivity to crack defects, no impact on the human body and the environment, low cost, and convenience. During the implementation of ultrasonic inspection, the design of the probe scanning path is the key to the detection efficiency and detection ability. A good scanning path design ensures that the ultrasonic beam covers all possible defects and at the same time shortens the probe walking path as much as possible to minimize the workload of data acquisition and data analysis. [0003] The design of the trad...

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Application Information

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IPC IPC(8): G01N29/22
Inventor 胡平张俊马庆增李晓红肖凯张益成
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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