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Electromagnetic ultrasonic excitation probe design method based on magnetic induced shrinkage or elongation effect

An electromagnetic ultrasonic and magnetostrictive technology, which is used in the generation of ultrasonic/sonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, measurement devices, etc. And other issues

Active Publication Date: 2015-02-04
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Claims
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AI Technical Summary

Problems solved by technology

The previously designed electromagnetic ultrasonic excitation probes considered the excitation of mode waves, but did not consider the coupling between each mode, resulting in the impurity of the excited ultrasonic modes.
Due to the existence of multiple ultrasonic modes, not only the energy dispersion of each mode is caused, but also the data analysis is complicated.

Method used

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  • Electromagnetic ultrasonic excitation probe design method based on magnetic induced shrinkage or elongation effect
  • Electromagnetic ultrasonic excitation probe design method based on magnetic induced shrinkage or elongation effect
  • Electromagnetic ultrasonic excitation probe design method based on magnetic induced shrinkage or elongation effect

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Embodiment Construction

[0016] In order to enable those skilled in the technical field to which this application belongs to understand this application more clearly, the technical solutions of this application will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0017] The main implementation principle of the present invention is: according to the sound propagation principle in the solid plate, namely the propagation law of SH (Shear Horizontal, horizontal shear) guided wave, determine the best excitation frequency, and then design the electromagnetic ultrasonic excitation probe according to this frequency . Among them, the electromagnetic ultrasonic excitation probe is composed of a permanent magnet magnetic block 1 and an electromagnetic ultrasonic excitation coil 2, such as figure 1 As shown, the electromagnetic ultrasonic excitation coil 2 is placed between the N pole and the S pole of the permanent magnet magnet block 1. The permanent magnet...

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Abstract

The invention discloses an electromagnetic ultrasonic excitation probe design method based on magnetic induced shrinkage or elongation effect, according to the sound propagation principle, namely SH type guided wave propagation rule, in a solid plate, optimum excitation frequency is determined, and according to the frequency, an electromagnetic ultrasonic excitation probe is designed; the prominent advantage of the proposed design method are that a right excitation frequency f' is selected for enhancement of1 order mode guided wave in the plate and effective inhibition of 0 order mode guided wave, simplification of the mode of a guided wave excited in a particular frequency can be realized, the signal-to-noise ratio is improved, and the defect detection probability and quantization accuracy can be effectively improved.

Description

Technical field [0001] The invention relates to the technical field of non-destructive testing, and in particular to a design method of an electromagnetic ultrasonic excitation probe based on the magnetostrictive effect. Background technique [0002] Ultrasonic testing is one of the commonly used non-destructive testing methods in the industry. When the ultrasonic wave propagates in the object and encounters a defect, a part of the sound wave will be reflected and received by the ultrasonic probe. By analyzing the reflected wave, the defect can be accurately measured, and the position and size of the internal defect can be displayed, and the thickness of the material can be measured Wait. [0003] The electromagnetic ultrasonic technology directly participates in the energy conversion of the measured object and does not require an additional coupling agent, so it becomes the only effective means of exciting ultrasound in some special occasions. For ferromagnetic materials, electr...

Claims

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Application Information

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IPC IPC(8): G01N29/24G01N29/34
Inventor 邱长春曹崇珍张永江杨金生陈崇祺赵云利杨寒邸强华傅丹蓉
Owner BC P INC CHINA NAT PETROLEUM CORP
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