Correction technique of phase aberration in ultrasonic synthetic focusing signal

Author

Hai-lin Yue ; Lin Luo ; Xiao-rong Gao

Author_Institution

NDT Res. Center & Olympus NDT Joint Lab. of Nondestructive Testing, Southwest Jiaotong Univ., Chengdu, China

fYear

2014

fDate

20-23 June 2014

Firstpage

74

Lastpage

78

Abstract

The materials of testing specimen are nonuniform, which leads to phase aberration in ultrasonic signal. The resolution of ultrasonic image decreases as a result of phase aberration, this paper proposes a method that can correct the phase aberration through calculating signal correlation. In this method, we calculate the correction function between the reference signal and other signals and choose the position of the maximum value to correct the phase aberration. The resolution improves through this method.

Keywords

ultrasonic focusing; ultrasonic imaging; ultrasonic materials testing; SAFT imaging algorithm; nondestructive testing; phase aberration; signal correlation; synthetic aperture focusing technology; ultrasonic image; ultrasonic synthetic focusing signal; Acoustics; Arrays; Focusing; Image resolution; Signal to noise ratio; Ultrasonic imaging; phase aberration; phase correction; resolution; ultrasonic imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Nondestructive Evaluation/Testing (FENDT), 2014 IEEE Far East Forum on

Conference_Location

Chengdu

Print_ISBN

978-1-4799-4731-7

Type

conf

DOI

10.1109/FENDT.2014.6928236

Filename

6928236