A Simulation for Detecting Nonlinear Echoes from Microbubbles Packets

Ali, Mahmoud Fadl; El-Sayed, N. Z.; Eid, Ebtsam Ali

doi:10.1515/aoa-2015-0017

Cited by 1 publication

(1 citation statement)

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“…Diversos estudios han sido realizados para verificar la linealidad del sistema de instrumentos utilizados en la inspección ultrasónica. Se han utilizado bloques de acero de referencia (amplitud de área y amplitud de distancia) para medir el efecto de las variaciones microestructurales por tratamiento térmico en las propiedades mecánicas, ultrasónicas y elásticas del material [5]. La velocidad del haz ultrasónico en un elemento de prueba está vinculada a sus propiedades elásticas [6], y su valor es afectado por el tamaño de grano, precipitados y fases características [7].…”

Section: Introductionunclassified

Acoustic Parameters in Reference Standards for Calibration of the Industrial Ultrasound Test System

Vera Alvarado,

Caballero García,

Taboada Neira

2023

Proceedings of the 21th LACCEI International Multi-Conference for Engineering, Education and Technology (LACCEI 2023): “Leaders

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The non-destructive method of industrial ultrasound uses reference standards for calibration of the test system, a key factor to characterize a defect dimensionally. In welded steel structures, the AWS D 1. code suggests, depending on availability, various types of reference standards for calibration. It is important for the repeatability of the inspection results, regardless of whether one or another reference standard is used, to be certain of the measurement of its acoustic properties. The objective of the research was to obtain the speed and ultrasonic attenuation in the DSC, Kand K2 type reference standards, with longitudinal and transversal beam, by varying the frequency of the beam. The acoustic parameters in each reference were obtained by the direct contact method, pulseecho technique, 16 experimental runs were carried out with three repetitions to produce acoustic waves with a straight and transversal beam with refraction angles of 45 o , 60 o and 70º and frequencies of the 2.25, 5.0, 10.0 and 15 MHz transducer. The results reported that the comparable acoustic parameters differ in each reference standard, the speed of the ultrasonic beam decreased and the attenuation increased, as the frequency of the transducer increased, due to generating greater dispersion of the ultrasonic beam. It was not possible to obtain reliable results with transverse beam for sweep frequencies of 10 and 15 MHz. The type of reference standard and the frequency of the transducer have a significant effect on the measurements of the acoustic parameters.

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Section: Introductionunclassified