Research the AVG Curve Based on the Method of Flat Bottom Hole
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.
AVG curve fiat-bottomed hole attenuation coefficient curve fitting
Xiao Rui Wang Xiao Qing Zhang San Shan Jia
12 of Qinghexiaoying East Road,Hai Dian District,Beijing 100192,P.R.China;8F of Building F Shenlanhu Key Laboratory of Modern Measurement & Control Technology (Beijing Information Science & Technology 8F of Building F Shenlanhuating,6 of Beisihuanzhong Road,Chao Yang District,Beijing 100029,P.R.China
国际会议
上海
英文
2111-2114
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）