Method for measuring ultrasonic attenuation coefficient of solid material

A solid-state material and attenuation coefficient technology, which is used in the analysis of solids using sonic/ultrasonic/infrasonic waves. Effect

Inactive Publication Date: 2012-08-01
湖南省湘电锅炉压力容器检验中心有限公司 +1
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  • Description
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a reliable, convenient and fast method for measuring the ultrasonic attenuation coefficient of solid materials in view of the difficulty and low accuracy of conventional ultrasonic measurement of the attenuation coefficient of solid materials

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  • Method for measuring ultrasonic attenuation coefficient of solid material
  • Method for measuring ultrasonic attenuation coefficient of solid material
  • Method for measuring ultrasonic attenuation coefficient of solid material

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Embodiment Construction

[0017] The method for measuring the ultrasonic attenuation coefficient of solid material of the present invention is carried out according to the following steps:

[0018] 1. Select solid materials that need to be measured with different materials and specifications as samples. For example, the material is No. 45 steel, and the specification is 200×160×30mm (length×width×thick); ZG0Cr13Ni4Mo martensitic stainless steel, the specification is 160×100× 25mm (length × width × thickness); 6063 grade aluminum alloy material, thickness 40mm; unglazed porcelain insulator material, thickness 41mm; glazed porcelain insulator material, thickness 40mm;

[0019] 2. The test instrument is the Hanwei HS616 produced by Wuhan Zhongke Innovation Technology Co., Ltd. The probe is a type A pulse reflection reflection longitudinal wave straight probe, the coupling agent is engine oil, and the surface compensation is 0dB. Use the materials to be measured in step 1 respectively. The prepared standar...

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Abstract

The invention discloses a method for measuring the ultrasonic attenuation coefficient of a solid material. The method comprises the following steps of: selecting a solid material required to be measured for serving as a sample; selecting an ultrasonic detection instrument, and tuning the ultrasonic detection instrument by using the solid material required to be measured; performing ultrasonic detection on the solid material required to be measured by adopting the adjusted ultrasonic instrument and the conventional ultrasonic detection method, and at least recording the sound pressure amplitudes and sound path values of four times of ultrasonic echo waves; establishing a sound pressure and sound path product logarithmic function and sound path curve chart by adopting the conventional method according to the recorded sound pressure amplitudes and sound path values of the ultrasonic echo waves; and performing linear fitting by using the established curve chart and fitting a linear function relationship, wherein a linear function gradient is the ultrasonic attenuation coefficient of a field measured solid material. The method can be used for measuring the ultrasonic attenuation coefficient of a solid material without performing special processing, and has the characteristics of easiness, safety, reliability and high sensitivity.

Description

technical field [0001] The invention belongs to the technical field of nondestructive testing, and in particular relates to a method for measuring the ultrasonic attenuation coefficient of solid materials. It is suitable for measuring the ultrasonic attenuation coefficient of solid metal materials and solid non-metal materials. Background technique [0002] When ultrasonic waves propagate in the medium, the phenomenon that the ultrasonic energy gradually attenuates as the distance increases is called ultrasonic attenuation. The main causes of ultrasonic attenuation are beam diffusion, grain scattering and medium absorption. Generally speaking, medium attenuation refers to absorption attenuation. and scattering attenuation. The ultrasonic attenuation coefficient of solid materials changes with the characteristics of the material itself, such as grain size, density, etc., and the sound velocity and attenuation coefficient will change when the ultrasonic wave is relayed in dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/11
Inventor 龙会国胡波涛龙毅陈红冬谢阿萌
Owner 湖南省湘电锅炉压力容器检验中心有限公司
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