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Method for measuring ultrasonic nonlinearity generated by high-voltage pulser

A high-voltage pulse and measurement method technology, which is applied in the generation of ultrasonic/sonic/infrasonic waves, the use of sound waves/ultrasonic/infrasonic waves to analyze solids, and the use of sound waves/ultrasonic/infrasonic waves for material analysis, etc., can solve the problem that harmonic components cannot be completely removed And other issues

Inactive Publication Date: 2019-01-11
IUCF HYU (IND UNIV COOP FOUND HANYANG UNIV)
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  • Claims
  • Application Information

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Problems solved by technology

[0052] Usually, most researchers use a method of removing the harmonic component transmitted from the high-voltage pulse generator by installing a filter in the ultrasonic transmitting part in order to remove the nonlinearity of the transmitted signal, but it has not been possible to completely remove the transmitted signal. Harmonic components

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  • Method for measuring ultrasonic nonlinearity generated by high-voltage pulser
  • Method for measuring ultrasonic nonlinearity generated by high-voltage pulser
  • Method for measuring ultrasonic nonlinearity generated by high-voltage pulser

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Embodiment Construction

[0098] The advantages, features and methods for achieving the present invention will be clarified with reference to the accompanying drawings and the following detailed description of the embodiments.

[0099] However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various other forms. This embodiment is only used to complete the disclosure of the present invention and to allow those of ordinary skill in the art to which the present invention belongs to clearly understand the present invention. The scope of the present invention should be defined according to the protection scope of the invention. The same reference numerals denote the same structural elements throughout the specification.

[0100] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0101] In order to quantitatively evaluate the thermalization of materials, nonlinear parameters have been quantitativ...

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Abstract

The present invention relates to a method for measuring ultrasonic nonlinearity generated by a high-voltage pulser. More specifically, the method comprises: a calibration step for transmitting and receiving an ultrasonic signal to / from an object to be inspected having a reception probe attached thereto, the calibration step being performed by a receiving unit; a harmonic measurement step for transmitting a tone burst signal to the object to be inspected having a transmission / reception probe attached thereto, and receiving a tone burst signal that has passed through the object to be inspected,the harmonic measurement step being performed by the receiving unit; a harmonic measurement step for transmitting a tone burst signal to the object to be inspected having a transmission probe attachedthereto, and receiving the transmitted tone burst signal, the harmonic measurement step being performed by a transmitting unit; a calibration step for transmitting and receiving an ultrasonic signalto / from the object to be inspected having the transmission probe attached thereto, the calibration step being performed by the transmitting unit; and a step for measuring the ultrasonic nonlinearity of the object to be inspected by comparing fundamental frequency and harmonic components measured by the receiving unit and fundamental frequency and harmonic components measured by the transmitting unit.

Description

technical field [0001] The present invention relates to a non-linear measurement method of ultrasonic waves generated by a high-voltage pulse generator, and more specifically, to a technology for accurately evaluating material properties such as strength characteristics and thermalization degree of materials using ultrasonic waves. Background technique [0002] The nonlinear elastic properties of solid materials mean that the stress acting on the molecular distance between atoms in the material exhibits physical nonlinearity. In fact, the interatomic energy of solid materials does not have harmonic characteristics, but has non-harmonic characteristics. [0003] When an ultrasonic wave having a sinusoidal waveform with a specified frequency has sufficient amplitude and propagates in a solid medium with an inharmonic characteristic, the ultrasonic wave having a fundamental incident frequency is distorted due to a local difference in phase velocity according to the nonlinear ela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/07G01N29/34
CPCG01N29/12G01N29/343G01N29/42G01N29/4436G01N29/46G01N29/041G01N29/075G01N29/348G01N29/07G01N29/34
Inventor 章勍宁金钟范
Owner IUCF HYU (IND UNIV COOP FOUND HANYANG UNIV)
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