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A Flexible Probe with Array Sensors for Weld Defect Detection Based on Characteristic Guided Waves

A defect detection and characteristic guided wave technology, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of low surface adhesion, low detection accuracy, and loose adhesion, etc., to achieve improved reflectivity and simple and convenient operation , Enhance the effect of echo intensity

Active Publication Date: 2022-04-26
JIANGSU UNIV
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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention proposes a flexible sensor array sensor probe for weld defect detection based on characteristic guided waves, which solves the problem of low surface fit, loose fit and low detection accuracy in the process of weld defect detection. , the problem of poor adaptability

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  • A Flexible Probe with Array Sensors for Weld Defect Detection Based on Characteristic Guided Waves
  • A Flexible Probe with Array Sensors for Weld Defect Detection Based on Characteristic Guided Waves
  • A Flexible Probe with Array Sensors for Weld Defect Detection Based on Characteristic Guided Waves

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Such as Figure 1-3 As shown, the present invention is applicable to the detection of the butt weld of two steel plates and the annular weld of some pipelines, including 9 piezoelectric sensor units 1 arranged in an array, and 9 corresponding sensor placement devices 2, with the middle The device is arranged in a central axis array; the base axis interference fit angle adjustment device 3, the flexible sound-absorbing backing plate 4, the electromagnet adsorption fixing device 5, the sound-absorbing material filler 6, and the shell 7, the shell 7 is a cuboid; The sensor placement device 2 is fixed on the housing 7 through a fixing plate 21 . The flexible sound-absorbing backing plate 4 is arranged around the front end of the entire probe, and is made of mineral wool material, which is respectively glued to the shell 7, so that the probe...

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Abstract

The invention discloses a weld seam defect detection array sensor flexible probe based on characteristic guided waves, which belongs to the field of non-destructive testing. The sensor consists of a plurality of piezoelectric units forming a matrix, which are respectively placed in a flexible matrix frame; the devices on both sides of the internal flexible frame can adjust the contact angle between the piezoelectric units on both sides and the weld to obtain a larger contact area and realize the emission probe The optimal coupling with the receiving probe and the weld makes it better perform detection performance; the whole bottom of the probe is equipped with several electromagnets for adsorption. It is troublesome to support detection; the probe has simple structure, strong adaptability, and high detection efficiency. It is suitable for the detection of butt weld defects of larger equipment with uneven surface curvature and complex structure, and has broad application prospects.

Description

technical field [0001] The invention relates to the field of non-destructive testing, in particular to an array sensor flexible probe for weld defect detection based on characteristic guided waves. Background technique [0002] Welding is a common production process in life and plays a very important role in modern industrial production. It is a key technology in the manufacture of many large structures such as pressure vessels, ships, and offshore platforms. According to statistics, in the manufacture of pressure vessels, the welding workload accounts for more than 30% of the total workload, so the welding quality has a direct impact on the structural quality and the safety and reliability of use. [0003] Ultrasonic testing is one of the most widely used non-destructive testing methods for welds. Compared with other conventional non-destructive testing techniques, ultrasonic testing can detect small defects, fast speed, simple operation and convenient on-site testing. How...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/24G01N29/22G01N29/28
CPCG01N29/2437G01N29/223G01N29/28G01N2291/2675
Inventor 许桢英孔德祯姚滔王元霞李璇刘鑫温俊杰
Owner JIANGSU UNIV
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