| 布阵声成象的两种处理方式 |
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| 引用本文： | 张宝成. 布阵声成象的两种处理方式[J]. 声学学报, 1981, 6(6): 371-380. DOI: 10.15949/j.cnki.0371-0025.1981.06.005 |
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| 作者姓名： | 张宝成 |
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| 作者单位： | 中国科学院武汉物理研究所 |
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| 摘 要： | 本文利用Hilbert变换建立复信号与实信号间的关系,给出复振幅与实信号的关系.在此基础上从同一公式导出了处理顺序不同的两种成象方式,一是时间处理在前,空间处理在后的方式——全息处理方式;另一是空间处理在前,时间处理在后的方式.在全息处理方式中还导出一维线阵时间扫描的成象方法.在空间处理在前的方式中导出三种可能的形式,特别描述了空间序率滤波器成象.还将全息成象推广到综合孔径,引出了三个不同的处理方式.最后对两种成象方式进行比较。
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| 收稿时间： | 1979-03-16 |
TWO PROCESSING FASHIONS OF ARRAY ACOUSTICAL IMAGING |
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| ZHANG Bao-cheng. TWO PROCESSING FASHIONS OF ARRAY ACOUSTICAL IMAGING[J]. ACTA ACUSTICA, 1981, 6(6): 371-380. DOI: 10.15949/j.cnki.0371-0025.1981.06.005 |
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| Authors: | ZHANG Bao-cheng |
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| Abstract: | The relation between complex and real signal is established by means of Hilbert transform, and the relation between complex amplitude and real signal is established. On above basis two imaging fashions of various processing order from same formula are deduced, one is a fashion of time processing prior to spatial processing, corresponding to holographic processing fashion, other is a fashion of spatial processing prior to time processing. In holographic processing fashion the time scanning holographic fashion of one dimensional linear array is also developed. In fashion of spatial processing prior, the imaging fashion with Sequency Filters is demonstrated. Also the maging concept is used to sythetic aperture approach of acoustical holography, and three various processing fashions are deduced. Finally the comparison between two imaging fashions is discussed. |
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