An Ultrasonic Tomography for Reconstructing the Velocity Profile of Air Flow from Nonuniformly Spaced Projection Data
An Ultrasonic Tomography for Reconstructing the Velocity Profile of Air Flow from Nonuniformly Spaced Projection Data
复制标题
用于从非均匀间隔投影数据重建气流速度分布的超声波断层扫描
DOI：
10.9746/sicetr1965.28.1274
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Nariaki Ogata
中科院分区：
文献类型：
--
作者：
S. Teerawatanachai;K. Komiya;H. Sasamoto;Nariaki Ogata
计算机断层扫描 (CT) 技术用于根据超声波测速仪在一组特定路径上测量的平均速度来重建气流的速度剖面。虽然收集数据的扫描方法可以被认为是发散光束扫描的特例，但这组数据可以重新排列成隔行并行扫描的形式。还介绍了管道圆周处的零速度的知识，并且在每个视图中对数据进行插值以获得均匀间隔的数据。然后将其应用于并行扫描数据的卷积算法中。使用实验数据测试该方法并报告结果。
The technique of computed tomography (CT) is used to reconstruct velocity profile of air flow from its average velocities from ultrasonic velocimeter measuring over a specific set of paths. Although the scanning method for collecting data can be considered as a special case of diverged beam scan, this set of data can be rearranged into the form of interlaced parallel scan. A knowledge of zero velocity at circumference of the pipe is also introduced and the data are interpolated in each view to obtain uniformly spaced data. This is then applied in the convolution algorithm for parallel scan data. This method is tested with the data from the experiment and the result is reported.