Welding seam texture tissue nondestructive testing system

Abstract

The invention discloses a welding seam texture tissue nondestructive testing system. The welding seam texture nondestructive testing system comprises an alternating magnetic field generator and a magneto-optic sensor, wherein the alternating magnetic field generator is used for carrying out alternating excitation on a to-be-tested weldment, and the to-be-tested weldment produces an alternating magnetic field by virtue of the alternating magnetic field generator; the magneto-optic sensor is used for transmitting a polarized light to the to-be-tested weldment, can receive the polarized light reflected by the to-be-tested weldment and carries out imaging; and an imaging signal generated by the magneto-optic sensor is sent into a processor to be analyzed and processed. The welding seam texture tissue nondestructive testing system disclosed by the invention is applied to Faraday magneto-optical effect, when one polarized light passes through a magneto-optical thin film medium with magnetorotation property, a vibration plane of light vibration can rotate for a specific angle after the light passes through the medium due to existence of an external magnetic field, and the processor determines which part goes wrong by virtue of a deflection angle. The to-be-tested weldment does not need to be damaged in a testing process, nondestructive testing is realized, the alternating magnetic field can be used for measuring texture tissue characteristic of workpieces with high magnetic conductivity and low magnetic conductivity respectively, and an application range is wider.

Description

technical field [0001] The invention relates to the technical field of weld seam quality inspection, and further relates to a nondestructive inspection system for weld seam texture. Background technique [0002] After the material is welded, the quality of the weld seam is the key to the whole welding, and the difference in the texture structure type and distribution of the weld seam has a great influence on the quality of the weld. The detection of weld seam is particularly important. At present, the detection methods for weld texture structure mainly include: optical microscopy or electron microscopy, X-ray method, ultrasonic method and other methods. The optical method needs to cut the weldment, grind and corrode the metallographic sample, and then use an optical microscope or an electron microscope to observe the type and distribution of the texture of the sample, or take an image for image analysis, which requires more operators. It is high and needs to cut and sample ...

AI Technical Summary

Problems solved by technology

The optical method needs to cut the weldment, grind and corrode the metallographic sample, and then use an optical microscope or an electron microscope to observe the type and distribution of the texture of the sample, or take an image for image analysis, which requires more operators. It is high and needs to cut and sample the workpiece, which destroys the integrity of the workpiece; the X-ray method uses the X-ray interference generated by different atoms inside the material and the strong diffraction in certain directions for real-time imaging. X-rays have strong radiation and will The human body causes certain damage, and the detection speed is slow; the ultrasonic imaging method uses ultrasonic radiation to irradiate the material, and the type and distribution of texture tissue inside the material will affect the transmission characteristics of the ultrasonic wave. The signal acquisition device receives the signal and analyzes the weld texture Due to the difference in tissue, the images obtained by ultrasound are of poor clarity, and the features of textured tissue are not obvious

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