Research the AVG Curve Based on the Method of Flat Bottom Hole

Xiao Rui Wang; Xiao Qing Zhang; San Shan Jia

doi:10.4028/www.scientific.net/AMM.226-228.2111

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 226-228Research the AVG Curve Based on the Method of Flat...

Research the AVG Curve Based on the Method of Flat Bottom Hole

Abstract:

In order to accurately reduce the equivalent defect error and draw the AVG curve, the relational expression between the sound pressure and the beam path was deduced, which was based on the ultrasonic sound field theory, the complex-variable function and the quadric surface integration. Then this curve was implemented by using the hardware and the software which were based on the above theory. In addition, it was analyzed the factors of attenuation coefficient and fitting the curve--Lagrange interpolation, to reduce the method error. Finally, the analysis of testing data shows that: the AVG curve which is made by flat-bottomed hole can accurately measure the equivalent aperture and reduce the data error, after giving full consideration to the attenuation coefficient factors and curve fitting.

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Periodical:

Applied Mechanics and Materials (Volumes 226-228)

Pages:

2111-2114

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.226-228.2111

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Online since:

November 2012

Authors:

Xiao Rui Wang, Xiao Qing Zhang, San Shan Jia

Keywords:

Attenuation Coefficient, AVG Curve, Curve Fitting, Flat-Bottomed Hole

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