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Method for keeping directivity of sound field based on transducer

A directivity, transducer technology, applied in frequency/direction characteristic devices and other directions, can solve the problems of increasing lift-off distance, decreasing accuracy, and decreasing sound field distribution clarity.

Active Publication Date: 2022-06-24
LASER RES INST OF SHANDONG ACAD OF SCI
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Problems solved by technology

[0005] The present application provides a transducer-based method for maintaining the directivity of the sound field to solve the problem that the increase of the lift-off distance leads to a decrease in the clarity of the sound field distribution and reduces the possibility of determining the internal defects, damage and microcracks of ferromagnetic components. Technical issues with location accuracy

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  • Method for keeping directivity of sound field based on transducer
  • Method for keeping directivity of sound field based on transducer
  • Method for keeping directivity of sound field based on transducer

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Embodiment Construction

[0049] In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described The embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

[0050] In order to facilitate the technical solution of the application, some concepts involved in the application are first described below.

[0051] Referring to 1a, the positive z-axis of the coordinate system is defined as the N-pole direction of the magnet, and the positive y-axis is the current conduction...

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Abstract

The embodiment of the invention provides a transducer-based sound field directivity maintaining method, and belongs to the technical field of transducers, and the transducer-based sound field directivity maintaining method comprises the following steps: dividing a stepped magnet into a first cuboid magnet part and a second cuboid magnet part of which the cross-sectional area is smaller than that of the first cuboid magnet part; the width and the length of the main lobe part of the electrified butterfly coil are used as a first width and a first length, and the width and the length of the second cuboid magnet part are set to be any value between the first width and the first length and two times of the first width and the first length. According to the length and the width of the second cuboid magnet part, the unique values of the height of the second cuboid magnet part and the length, the width and the height of the first cuboid magnet part are obtained, so that the magnetic field on the surface of the workpiece is uniformly distributed within the set lift-off distance range. According to the first width, the length and the directivity function of the transverse wave sound field, the sound field directivity is obtained. The magnets are arranged to be step-shaped, so that the magnetic field on the surface of the workpiece is uniformly distributed in a set lift-off distance range, and the definition of sound field distribution is kept according to a directivity function of a transverse wave sound field.

Description

technical field [0001] The present application relates to the technical field of transducers, and in particular, to a transducer-based method for maintaining sound field directivity. Background technique [0002] Ferromagnetic materials include silicon steel, cobalt steel, high carbon steel, iron-nickel-cobalt alloys, and ferromagnetic components made of ferromagnetic materials are widely used in production and life, such as petrochemical, shipbuilding and construction. The life and reliability of ferromagnetic components are related to the internal defects, damage and micro-cracks of ferromagnetic components. Through piezoelectric ultrasonic testing, the internal defects, damage and micro-cracks of ferromagnetic components need to be detected using couplant. The detection result of piezoelectric ultrasonic detection is also affected by the coupling state, which reduces the detection speed and the detection accuracy is low in high temperature occasions. [0003] In order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/34
CPCH04R1/34
Inventor 马健白雪陈建伟郭锐宋江峰贾中青张振振徐国健
Owner LASER RES INST OF SHANDONG ACAD OF SCI
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