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Feature-guided-wave-based weld seam defect detection dedicated array type sensor time-sharing excitation system and method

A technology of characteristic guided wave and defect detection, which is applied to the generation of ultrasonic/sonic/infrasonic waves, the use of sound waves/ultrasonic/infrasonic waves to analyze solids, and the use of sound waves/ultrasonic/infrasonic waves for material analysis, etc., which can solve the problem of low detection accuracy and poor adaptability and other issues to achieve the effect of improved resolution, small dispersion, and high energy

Pending Publication Date: 2019-02-01
JIANGSU UNIV
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Problems solved by technology

[0010] Aiming at the deficiencies of the existing technology, the present invention proposes a time-sharing excitation system and method of a special array sensor for weld defect detection based on characteristic guided waves, which solves the problems of low detection accuracy and poor adaptability of traditional weld defect detection technology

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  • Feature-guided-wave-based weld seam defect detection dedicated array type sensor time-sharing excitation system and method
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  • Feature-guided-wave-based weld seam defect detection dedicated array type sensor time-sharing excitation system and method

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[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0038] Such as figure 2 As described above, a time-sharing excitation system of a special array sensor for weld defect detection based on characteristic guided waves mainly includes: a main controller 11, a digital-to-analog converter 12, a signal conditioning module 13, a time-sharing excitation module 14 and sensor 15;

[0039] Among them, the main controller 11 is the core part of the whole system, which can generate the excitation signal of the special array sensor for the weld seam characteristic guided wave, and can provide address signals and control signals to control the operation of the whole system; the digital-to-analog converter 12 is tight After being connected to the main controller, the digital signal generated by the main controller 11 can be converted ...

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Abstract

The invention discloses a feature-guided-wave-based weld seam defect detection dedicated array type sensor time-sharing excitation system and method. The feature-guided-wave-based weld seam defect detection dedicated array type sensor time-sharing excitation system comprises a master controller, a digital analog converter, a signal conditioning module, an analog multiplexer module, a phase shiftergroup and a sensor. According to the feature-guided-wave-based weld seam defect detection dedicated array type sensor time-sharing excitation method, under the circumstance that a single controller generates a one-way signal, a time-sharing excitation function of an array type sensor can be realized to enable signals excited by a single crystal oscillator in the array sensor to aggregate into anultrasonic guided-wave signal which has a high signal to noise ratio and high energy and can propagate remotely in a weld seam. The feature-guided-wave-based weld seam defect detection dedicated arraytype sensor time-sharing excitation system can be applied to weld seam defect detection of a large workpiece with uneven surface curvature and a complex structure, and has wide application prospects.

Description

technical field [0001] The invention relates to the field of non-destructive testing, in particular to a time-sharing excitation system and method for a special array sensor for welding seam 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, simpl...

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Application Information

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IPC IPC(8): G01N29/34G01N29/04
CPCG01N29/045G01N29/341G01N2291/0289G01N2291/267
Inventor 许桢英姚滔孔德祯李璇刘鑫温俊杰
Owner JIANGSU UNIV
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