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Electromagnetic ultrasonic excitation probe design method

An electromagnetic ultrasonic and excitation coil technology, which is used in the generation of ultrasonic/sonic/infrasonic waves, the use of sonic/ultrasonic/infrasonic waves for material analysis, measurement devices, etc., and can solve problems such as impure ultrasonic patterns.

Active Publication Date: 2015-02-04
BC P INC CHINA NAT PETROLEUM CORP +2
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Problems solved by technology

[0004] The invention provides a design method of an electromagnetic ultrasonic excitation probe to solve the technical problem of impurity in the ultrasonic mode excited by the previously designed probe

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Embodiment Construction

[0015] 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.

[0016] The main implementation principle of the present invention is: according to the sound propagation principle in the solid plate, i.e. the propagation law of the SH (Shear Horizontal, horizontal shear) type guided wave, determine a specific 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 generates ...

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Abstract

The invention discloses an electromagnetic ultrasonic excitation probe design method, 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; enhancement of SH type 0 order mode guided wave and inhibition of 1 order mode guided wave in the plate can be realized, simplification of the mode of a guided wave excited in a particular frequency can be realized, the signal-to-noise ratio is improved, and defect detection probability and quantization accuracy can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of nondestructive testing, in particular to a design method of an electromagnetic ultrasonic excitation probe. 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 three mechanisms in electromagnetic u...

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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