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OALib Journal期刊
ISSN: 2333-9721
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？颗粒两相流超声过程层析成像系统研究
DOI: 10.13232/j.cnki.jnju.2013.01.017, PP. 20-26
Keywords: 颗粒两相流,超声过程层析成像,labview,同步采集
Abstract:
？本文主要介绍了一种基于透射模式的超声波层析成像系统的设计与研究.针对radon变换与radon反变换对获得精确重建图像所提出的无限多的投影数据要求，系统在以下几个方面做了改进:系统换能器阵列由16个换能器组成，每个换能器均可以作为发射端和接收端，可发射的扇形波束角度为15%;基于labvifw软件和2块高速同步数据采集卡，设计了16通道的数据同步采集和信号处理装置;利用单片机89s52设计了切换电路，可以实现16换能器的激励和接收功能的自动切换.经实验验证，系统结构简单，实时性好，获得了足够多有效的信号数据，通过二值化逻辑反投影图像重建算法实现了研究物体横断而的图像重建.
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