Character guided wave based butt-weld defect detection system and detection method thereof

A technology of characteristic guided wave and defect detection, which is applied in the generation of ultrasonic/sonic wave/infrasonic wave, measuring device, and processing detection response signal, etc., which can solve the problems of low detection efficiency, improve detection efficiency, be convenient to carry, and realize online Detection effect

Active Publication Date: 2016-12-07
江苏宏大特种钢机械厂有限公司
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Problems solved by technology

[0008] Aiming at the deficiencies of the existing technology, the present invention proposes a butt weld defect detection system and detection met

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  • Character guided wave based butt-weld defect detection system and detection method thereof
  • Character guided wave based butt-weld defect detection system and detection method thereof
  • Character guided wave based butt-weld defect detection system and detection method thereof

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Embodiment Construction

[0035] 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.

[0036] Such as figure 1 , 2 As shown, a butt weld defect detection system based on characteristic guided waves is composed of a characteristic guided wave transceiver host 4, a characteristic guided wave sensor 3 and a host computer 5;

[0037] The characteristic guided wave sensor 3 is arranged parallel to the upper end surface of the inspected weld seam 2 of the plate 1 along the direction of the inspected weld seam 2; The wave sensor 3 is connected, and another communication serial port 46 of the characteristic guided wave transceiver host 4 is connected with the host computer 5, so as to realize the signal transmission in the weld defect detection process;

[0038] The characteristic guided wave transceiver host 4 is composed of a signal generator 6, a power amplifi...

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Abstract

The invention discloses a character guided wave based butt-weld defect detection system and a detection method thereof. The detection system is composed of a character guided wave transceiving host, a character guided wave sensor and an upper computer; the character guided wave sensor is horizontally arranged on the upper end face of a detected welding line along the direction of the detected welding line, a signal input end and a signal output end of a sensor of the character guided wave transceiving host are respectively connected with the character guided wave sensor, a communication serial port is connected with the upper computer, and data processing analysis software and a database are installed on the upper computer. The detection method includes: adopting a ratio modal analysis method to separate modal wave packets, and selecting specific modals to have defects positioned according to a pulse-echo method; extracting energy information by the aid of a frequency diagram with smoothness being Wigner-Ville and evaluating sizes of the defects; extracting wave characters and inquiring the waveform comparison database to judge types of the defects. By the arrangement, in-service detection can be realized, and the system is high in detection efficiency, low in cost, portable, especially suitable for rapid and efficient detection for long-distance welding lines of large equipment structures and high in automation degree.

Description

technical field [0001] The invention relates to the field of non-destructive testing, in particular to a butt weld defect detection system and detection method based on characteristic guided waves. Background technique [0002] Weld seam is an important connection part in large steel plate structure and equipment, and the safety of its structure directly affects the efficiency and safety of industrial production. Defects, as an important factor in the degree of weld hazard, have a great impact on the performance and service life of the product. According to my country's current laws and regulations and general practices, a certain number of ultrasonic or radiographic tests are required for the butt welds formed after welding in the process of mechanical equipment manufacturing to ensure product quality. [0003] The traditional ultrasonic detection technology adopts the point-by-point scanning method, which is not only time-consuming and laborious, but also has certain dete...

Claims

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Application Information

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IPC IPC(8): G01N29/04G01N29/24G01N29/26G01N29/28G01N29/34G01N29/44
CPCG01N29/04G01N29/245G01N29/26G01N29/262G01N29/28G01N29/348G01N29/46G01N2291/0234G01N2291/101G01N2291/102G01N2291/106G01N2291/2675
Inventor 许桢英洪红刘欢杜晗万东燕
Owner 江苏宏大特种钢机械厂有限公司
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