Sound wave direction control method of frequency sweeping multichannel ultrasonic guided wave device

An ultrasonic guided wave and direction control technology, which is applied to the generation of ultrasonic/sonic/infrasonic waves, material analysis using sonic/ultrasonic/infrasonic waves, and measurement devices, etc. It can solve problems such as superimposed signal distortion and achieve the effect of suppressing signal leakage.

CN114354767AActive Publication Date: 2022-04-15HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-04-15

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Abstract

The invention discloses a sound wave direction control method of a sweep-frequency multichannel ultrasonic guided wave device, solves the problem that an existing guided wave direction control method can cause distortion of superposed signals under certain frequencies, and belongs to the technical field of nondestructive testing and evaluation. The method comprises the steps that transducers of an ultrasonic guided wave device are installed on a tested piece, transmitting coils of the transducers are distributed side by side at any intervals in the ultrasonic guided wave propagation direction, coordinate axes are established, the number of the transmitting coils is n, excitation current amplitudes of the first (n-1) transmitting coils are all set as Ix, and the excitation current amplitude of the nth transmitting coil is set as (n-1) Ix; at any point x and any moment t0 of the suppressed side of the ultrasonic guided wave signals, all the signals reach the point x at the same time, the amplitude is zero after superposition, and the excitation current initial phase of each transmitting coil is calculated; and adjusting the initial phase of excitation current of the transmitting coil array to realize direction control of sound waves.
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Description

technical field

[0001] The invention relates to an optimization method for sound wave direction control of a frequency-sweeping multi-channel ultrasonic waveguide device, and belongs to the technical field of non-destructive testing and evaluation. Background technique

[0002] With the continuous development of the level of industrialization, it is of great significance to regularly inspect and monitor the health of industrial structures to ensure their safe operation. Therefore, the application of non-destructive testing technology is becoming more and more extensive, especially the ultrasonic guided wave testing technology, which has the technical advantages of high detection efficiency and low cost, and is suitable for defect detection and health monitoring of large industrial structures.

[0003] The electromagnetic ultrasonic guided wave detection method is easier to control the type, mode and propagation direction of the guided wave by changing the structure of the tr...

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0021] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0023] The frequency-sweeping multi-channel ultrasonic guided wave device of this embodiment includes a multi-ch...