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摘要:In this paper,a design concept of sparse array is applied to total focusing imaging technique.During the process,the elements of a phased array are partially selected according to the theory of effective aperture,in order to reduce the amount of captured data and shorten the processing time of TFM imaging.Simulated imaging with Field II program and experimental verification on two standard phased array specimens are performed,based on three selected arrays which are sparsely as 1/2,1/4 and 1/8.The results compared with the full array in terms of image quality and computing efficiency,show that the computing efficiency of TFM imaging can get a rise of 40 percent by adopting the sparse array design.Meanwhile,an approximate resolution can be achieved at the lowest array sparse rate of 1/4.Affected by the side-lobes of the ultrasonic beam,contrast of the image may suffer little loss.
会议名称:

2014 IEEE Far East Forum on Nondestructive Evaluation/Testing: New Technology & Application Increasingly perfect NDT/E

会议时间:

2014-06-20

会议地点:

中国四川成都

  • 专辑:

    信息科技

  • 专题:

    计算机软件及计算机应用

  • 分类号:

    TP391.41

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