FPGA-Based Control System of an Ultrasonic Phased Array

被引：0

作者：

Ferreira dos Santos, Mario Joao Simoes ^{[1
]}

dos Santos, Jaime Batista ^{[1
]}

机构：

[1] Univ Coimbra, Mech Engn Res Ctr, Dept Elect Engn & Comp, P-3030290 Coimbra, Portugal

来源：

STROJNISKI VESTNIK-JOURNAL OF MECHANICAL ENGINEERING | 2011年 / 57卷 / 02期

关键词：

ultrasonic imaging; phased array; B-scan; FPGA;

D O I：

10.5545/sv-jme.2010.178

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

One of the main features of ultrasonic phased arrays is the ability to create an ultrasonic focused beam by applying time-delayed signals to each one of the elements of the array. If the focused beam can sweep a certain area it is possible to obtain a B-scan image. This process is called beamforming. In this work, a prototype control system for a phased array, based in a FPGA (Field Programmable Gate Array), was conceived. The array has 30 elements and is to be used in B-scan low resolution imaging (50 x 50 pixels). Time-delayed was implemented by means of a 50 MHz oscillator; which allows a minimum delay of 20 ns. By using nine bits counters it is possible to obtain a maximum delay of 10.24 mu s between control signals. The scanning sector area is 60 mm in depth and a +/- 30 degrees aperture. (C)2011 Journal of Mechanical Engineering. All rights reserved.

引用

页码：135 / 141

页数：7

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