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A Design Method of Electromagnetic Ultrasonic Excitation Probe Based on Magnetostrictive 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: 2017-04-05
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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  • A Design Method of Electromagnetic Ultrasonic Excitation Probe Based on Magnetostrictive Effect
  • A Design Method of Electromagnetic Ultrasonic Excitation Probe Based on Magnetostrictive Effect
  • A Design Method of Electromagnetic Ultrasonic Excitation Probe Based on Magnetostrictive Effect

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Embodiment Construction

[0016] In order to enable those skilled in the technical field to which the application belongs to understand the application more clearly, the technical solutions of the 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, i.e. the propagation rule of SH (ShearHorizontal, horizontal shear) type guided wave, determine the optimal excitation frequency, and then design the electromagnetic ultrasonic excitation probe according to the frequency. Wherein, the electromagnetic ultrasonic excitation probe is composed of a permanent magnet 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 block 1, and the permanent magnet block 1 ge...

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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, 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 most commonly used non-destructive testing methods in industry. When the ultrasonic wave propagates in the object and encounters a defect, part of the sound wave will be reflected and received by the ultrasonic probe. By analyzing the reflected wave, the defect can be accurately detected, and the position and size of the internal defect can be displayed, and the thickness of the material can be measured. Wait. [0003] Electromagnetic ultrasonic technology is the only means that can effectively excite ultrasonic waves in some special occasions because the measured object directly participates in energy conversion and does not require additional coupling agent. For ferromagnetic materials, there are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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