Multi-information fusion weld defect detection system and method

Abstract

The invention relates to a multi-information fusion weld defect detection system and method. The system comprises an infrared thermal imaging detection module, an ultrasonic detection module, a visible light detection module, an information processing module, an image matching module and a visual display module. By fusing visible light, infrared thermal imaging and ultrasonic detection technologies, detection of surface and internal defects of a weld joint is realized so that the accuracy of weld joint detection is improved; the ultrasonic array detection and the infrared thermal imaging detection are used for respectively detecting the internal defect information of the weld joint so that the three-dimensional visual imaging of the internal defect of the weld joint is realized, and a basis is provided for the weld joint quality evaluation and the improvement of a welding process; an ultrasonic thermal excitation device in the infrared thermal imaging detection module and an ultrasonicgeneration device in the ultrasonic detection module select double-frequency ultrasonic generation devices, corresponding ultrasonic waves are generated and emitted according to the ultrasonic frequency required by the respective modules, and synchronous measurement of ultrasonic detection and infrared thermal imaging detection is realized.

Description

technical field [0001] The invention belongs to the technical field of weld detection, and in particular relates to a multi-information fusion weld defect detection system and method. Background technique [0002] As an important technical means in modern machinery manufacturing, welding technology has been widely used in the process of machinery manufacturing. In the welding process, it is inevitable that there will be changes in the welding direction caused by human or non-human factors, which will lead to welding deviation; in the welding process, the change of welding parameters will directly affect the change of the shape of the weld, and then produce welding defects. Seriously affect the welding quality. In the welding of important industries such as aerospace, nuclear power, chemical industry containers, high-speed rail manufacturing, and automobile ships, in addition to internal inspection requirements, strict weld appearance and surface defect inspections are also ...

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Problems solved by technology

The X-ray method should be detected by radiation, and radiation protection devices are required to avoid radiation hazards, resulting in low safety and high cost; although magnetic flux detection is not as harmful to the human body as hard rays, its electromagnetic pollution is large. There is a certain impact on the peripheral equipment and the environment; the ultrasonic flaw detection method has the advantages of high detection sensitivity and fast speed, but it requires an ultrasonic coupling agent during detection, and the technical requirements for the operator are also high. Large, it is difficult to realize welding of large-scale structural parts

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