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Ultrasonic-based and electromagnetic ultrasonic combined dual-mode nondestructive testing method and device

An electromagnetic ultrasonic and non-destructive testing technology, which is applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of single detection parameters and low detection sensitivity, and achieve high detection accuracy and sensitivity and fast judgment.

Active Publication Date: 2014-06-04
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the low detection sensitivity of the prior art and the shortcoming of a single detection parameter, and propose a highly sensitive, fast, multi-parameter nondestructive detection method

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  • Ultrasonic-based and electromagnetic ultrasonic combined dual-mode nondestructive testing method and device
  • Ultrasonic-based and electromagnetic ultrasonic combined dual-mode nondestructive testing method and device
  • Ultrasonic-based and electromagnetic ultrasonic combined dual-mode nondestructive testing method and device

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] Such as figure 1 As shown, the nondestructive testing device of the present invention includes a pulse excitation system 1 , an ultrasonic probe array 4 , a magnet system 3 , a control system 2 , a signal detection processing system 5 and a reconstruction system 6 . The control system 2 is connected to the pulse excitation system 1 , the ultrasonic probe array 4 and the magnet system 3 , the ultrasonic probe array 4 is connected to the signal detection processing system 5 , and the signal detection processing system 5 is connected to the reconstruction system 6 . The detection surface of the ultrasonic probe array 4 and the metal component to be tested are coupled through water or insulating oil, and the detection surface of the ultrasonic probe array 4 is perpendicular to the direction of the main magnetic field.

[0035] The working p...

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Abstract

The invention discloses an ultrasonic-based and electromagnetic ultrasonic combined dual-mode nondestructive testing method and device. The method comprises the following steps: coarsely testing a metal member under the action of a non-static magnetic field by utilizing an ultrasonic detection method; and applying pulsed excitation current to the metal member under the action of a static magnetic field. Lorentz force is generated inside the metal member under the action of the static magnetic field, so that an acoustical signal is generated due to the Lorentz force, and ultrasonic signals generated at positions with defects or without defects of the metal member are different. The electric conductivity distribution of the metal member is reconstructed through an ultrasonic probe array attached to the metal member, and the defects of the metal member are detected according to the result generated by combining the electric conductivity distribution and the ultrasonic detection. According to a device by using the detection method, a control system (2) is connected with a pulsed excitation system (1), an ultrasonic probe array (4) and a magnet system (3); the ultrasonic probe array (4) is connected with a signal detection processing system (5); the signal detection processing system (5) is connected with a reconstruction system (6).

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a dual-mode non-destructive testing method and device combining ultrasound and electromagnetic ultrasound. Background technique [0002] Nondestructive testing technology is to use the changes in the reaction to heat, sound, light, electricity, magnetism, etc. caused by the abnormal internal structure of the material or the existence of defects under the condition of not damaging the measured object, to realize the inspection of various engineering materials and parts. It is a technology to detect surface defects of internal goods such as structural parts, and to make judgments and evaluations on the type, size, shape, position and other information of defects in the detection object. Nondestructive testing involves multiple disciplines and technical fields such as physics, materials science, and electronic information technology. [0003] At present, conventiona...

Claims

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Application Information

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IPC IPC(8): G01N27/00
Inventor 夏慧刘国强李艳红李士强夏正武李晓南张超郭亮陈晶黄欣
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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