Full-matrix capture with a customizable phased array instrument

Abstract

In recent years, a technique known as Full-Matrix Capture (FMC) has gained some headway in the NDE community for phased array applications. It's important to understand that FMC is the method that the instrumentation acquires the ultrasonic signals, but further post-processing is required in software to create a meaningful image for a particular application. Having a flexible software interface, small form factor, excellent signal-to-noise ratio per acquisition channel on a 64/64 or 128/128 phased array module with FMC capability proves beneficial in both industrial implementation and in further investigation of post-processing techniques. This paper will provide an example of imaging with a 5MHz linear phased array transducer with 128 elements using FMC and a popular post-processing algorithm known as Total-Focus Method (TFM).

Strategies for data acquisition using ultrasonic phased arrays

“…Modern computational power makes it possible to collect raw array data first and then perform image reconstruction in post-processing. One common data collection method, which is now available in many commercial ultrasonic array systems is Full Matrix Capture (FMC) [1–4]. In this case, the ultrasonic wave is consecutively transmitted by each array element and the reflected signal is measured by all array elements simultaneously.…”

“…Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/ by/4.0/, which permits unrestricted use, provided the original author and source are credited. is Full Matrix Capture (FMC) [1][2][3][4]. In this case, the ultrasonic wave is consecutively transmitted by each array element and the reflected signal is measured by all array elements simultaneously.…”

Fast total focusing method for ultrasonic imaging

“…The piece is inspected using a contact array transducer with N el = 128 and d = 0.5 mm, around 5 MHz. The acquisition is performed using the OEMPA device [14], developed by the AOS company 1 . Those devices enables the full matrix acquisition in real-time with high precision.…”

Reconstrução De Imagens De Ultrassom Pelo Método De Focalização Total: Técnicas Para Melhoria Da Relação Sinal Ruído

“…O princípio básico da inspeção por ultrassom tem como base a emissão e propagação de uma onda ultrassônica pelo material de teste, seguido da recepção e análise da onda resultante da interação com esse material. Dentre as modalidades de inspeção por ultrassom existentes, destaca-se o uso da tecnologia Phased Array (PA), que revolucionou o âmbito de ensaios nãodestrutivos [1]. Isso porque o PA é um dispositivo que agrega vários elementos piezoelétricos em um mesmo transdutor, no qual cada elemento pode ser pulsado separadamente, permitindo o emprego de um único transdutor na realização de várias inspeções sem a necessidade de reconfiguração [2].…”

“…Em comparação com as técnicas clássicas de inspeção, o advento dos Phased Arrays (PA) revolucionou o processo de inspeção ao fornecer visualização multidimensional do meio inspecionado [1]. Estes transdutores são compostos por vários elementos piezoelétricos que podem ser disparados independentemente ou em conjunto.…”