Method for detecting integrity of weld through ultrasonic guided wave array

An ultrasonic guided wave and integrity technology, which is applied in the direction of using sound wave/ultrasonic wave/infrasonic wave to analyze solids, etc., can solve the problems of incomplete detection, inability to identify and reasonably evaluate the integrity of welds, etc., and achieve the effect of high precision

Inactive Publication Date: 2016-01-20
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY +2
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Problems solved by technology

[0003] There are still many defects in the existing welding seam inspection technology, the most obvious is that the inspection is not thorough, and the integrity of the weld seam cannot be identified and reasonably evaluated. Therefore, we propose an ultrasonic guided wave array inspection method for weld seam integrity. to solve the above problems

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  • Method for detecting integrity of weld through ultrasonic guided wave array
  • Method for detecting integrity of weld through ultrasonic guided wave array
  • Method for detecting integrity of weld through ultrasonic guided wave array

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Embodiment Construction

[0020] The present invention will be further described below in combination with specific embodiments.

[0021] A method for detecting weld integrity with an ultrasonic guided wave array proposed by the present invention comprises the following steps:

[0022] a. Excite L(0,2) symmetric guided waves in pipeline welding, and arrange sensor arrays on both sides of the weld. The sensor array method is to arrange 16 sensors evenly on both sides of the weld, a total of 32 sensors, respectively marked as S 1q ,S 2q ,….S 16q , indicating the sensor at the front end of the weld; S 1h ,S 2h ,….S 16h , indicating the sensor at the back end of the weld.

[0023] Such as image 3 As shown, the peak value of the guided wave signal recorded by the No. 1 sensor after the weld is divided by the peak value of the guided wave signal recorded by the No. 1 sensor before the weld to obtain the transmission coefficient, and by analogy, the circumferential distribution of 16 transmission coef...

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Abstract

The invention discloses a method for detecting the integrity of a weld through an ultrasonic guided wave array. The method comprises the following steps: 1, exciting L (0, 2) symmetrical guided waves in a pipeline, and arranging sensor arrays at two sides of the weld to receive a detection signal; 2, calculating the peak of incoming waves before the guided waves go through the weld and the peak of transmitted waves after the guided waves go through the weld, and adopting the reciprocal of a transmission coefficient as a damage index; and 3, drawing the circumferential distribution curve of the damage index, and carrying out weld defect parameter identification on the peaks of the curve. The ultrasonic guided wave array is adopted to realize thorough detection and high precision of the integrity of the weld.

Description

technical field [0001] The invention relates to the technical field of weld integrity detection, in particular to a method for detecting weld integrity with an ultrasonic guided wave array. Background technique [0002] As customer expectations continue to rise, the quality of welds is becoming more and more important. Products and components are expected to be of high quality without unexpected failures. Such failures with significant financial and social consequences can often be avoided with proper detection techniques. Inspecting welds can also reduce costs by detecting defects at an early stage of manufacturing, reduce the cost of customer returns and extend the life of components by detecting and correcting all defects. [0003] There are still many defects in the existing welding seam inspection technology, the most obvious is that the inspection is not thorough, and the integrity of the weld seam cannot be identified and reasonably evaluated. Therefore, we propose ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 张伟伟王向宇马宏伟朱渝
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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