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An Electromagnetic Ultrasonic and Pulsed Eddy Current Composite Detection Sensor

A pulsed eddy current and electromagnetic ultrasonic technology, which is used in material analysis by electromagnetic means, analysis of solids and instruments using sonic/ultrasonic/infrasonic waves, etc. The effect of value and signal-to-noise ratio

Active Publication Date: 2021-08-17
四川沐迪圣科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem with this method is that the electromagnetic ultrasound and the eddy current are still excited and received separately, and the two probes are different in spatial position, so it is impossible to realize real-time detection of the same position.

Method used

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  • An Electromagnetic Ultrasonic and Pulsed Eddy Current Composite Detection Sensor
  • An Electromagnetic Ultrasonic and Pulsed Eddy Current Composite Detection Sensor
  • An Electromagnetic Ultrasonic and Pulsed Eddy Current Composite Detection Sensor

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Embodiment

[0028] figure 1 It is a working principle diagram of an electromagnetic ultrasonic and pulsed eddy current composite detection sensor of the present invention.

[0029] In this implementation case, if figure 2 As shown, an electromagnetic ultrasonic and pulsed eddy current composite detection sensor of the present invention includes: copper foil shielding layer 1, permanent magnet 2, pulsed eddy current coil 3, electromagnetic ultrasonic coil 4, pulsed eddy current BNC interface 5, electromagnetic ultrasonic BNC interface 6, Wear-resistant layer 7.

[0030] in, figure 2 main view, image 3 It is a plan view design diagram of the coil, and the sensor described in the present invention will be described in detail below in combination with these two diagrams.

[0031] The copper foil shielding layer 1 is a hollow cylinder with end caps on its upper surface, made of non-ferromagnetic materials such as copper foil, the difference between the inner and outer diameters is less ...

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Abstract

The invention discloses an electromagnetic ultrasonic and pulsed eddy current composite detection sensor. The ultrasonic wave and the eddy current are simultaneously excited by the same excitation source, and two channels are respectively used to receive the electromagnetic ultrasonic signal and the pulsed eddy current signal, so as to realize the detection of the near surface and the test piece. detection of internal defects. Specifically, the electromagnetic ultrasonic system excites a high-frequency and high-power pulse signal and sends it to the electromagnetic ultrasonic coil. The electromagnetic ultrasonic coil generates pulsed eddy current under the drive of the excitation signal, and the pulsed eddy current generates ultrasound under the static magnetic field of the permanent magnet; the pulsed eddy current coil receives After receiving the induced voltage signal from the primary magnetic field of the electromagnetic ultrasonic coil and the secondary magnetic field of the pulsed eddy current in the tested piece, the information about the surface defect of the tested piece is obtained after being collected and processed by the oscilloscope; and the electromagnetic ultrasonic coil receives the ultrasonic echo After the induced voltage signal of the electromagnetic wave is amplified and filtered by the electromagnetic ultrasonic system, the information about the internal and lower surface defects of the tested piece is obtained.

Description

technical field [0001] The invention belongs to the technical field of nondestructive testing, and more specifically relates to an electromagnetic ultrasonic and pulsed eddy current composite detection sensor. Background technique [0002] Nondestructive Testing (NDT) technology refers to the change of physical characteristics of the measured object due to defects or differences in organizational structure without damaging the performance, shape and internal structure of the measured object. The technique of understanding and evaluating the nature, quality, state or internal structure of the measured object. Ultrasonic testing is the most mature testing method used in modern industry, but it needs couplant in the testing process, which is not convenient for practical use, and there are detection blind spots. [0003] Electromagnetic ultrasonic (Electromagnetic Acoustic Transducer, EMAT) detection technology is a new detection technology developed on the basis of traditional...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/07G01N27/90
CPCG01N27/90G01N27/9006G01N29/07G01N2291/011G01N2291/023
Inventor 高斌郭伟
Owner 四川沐迪圣科技有限公司
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