Ultrasonic-Frequency-Based Visualization of Columnar Soft Matter Beyond Wavelength Limitations
Ultrasonic-Frequency-Based Visualization of Columnar Soft Matter Beyond Wavelength Limitations
复制标题
超越波长限制的柱状软物质的基于超声波频率的可视化
DOI:
10.1109/tsmc.2016.2598294
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
and Tomomoto Ishikawa
中科院分区:
文献类型:
--
作者:
Yutaka Hata;Fellow;IEEE;Yuya Takashima;Koki Tsukuda;Sho Kikuchi;and Tomomoto Ishikawa
This paper first describes a relation between the frequency and the diameter of columnar soft matter by using broadband ultrasonic single-probe testing. We found an inverse relation between the diameter (100-300 μm) and frequency (1.0-6.0 MHz) of the ultrasonic reflection waveform from columnar soft matter in water. This fact shows that we can determine diameters that are not possible to determine by the standard pulse-echo method. An ultrasonic wavelength with center frequency of 15 MHz is limited to measurements of less than 100-μm thickness in water (wave speed: around 1500 m/s). However, the relation found in this paper enables us to determine these diameters by broadband ultrasonic testing with center frequency of 5.0 MHz, beyond the previous wavelength limitation. Second, this paper proposes a visualization method that uses the discovered relation. An image is produced by using particular frequency components derived via short-time Fourier transform. We employ a phantom consisting of two types of nylon lines, one with thin and the other with thick diameters. The experimental result clearly demonstrated line width and depth beyond the wavelength limitation.
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影响因子:
4.6
作者:
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通讯作者:
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影响因子:
6.7
作者:
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通讯作者:
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DOI:
10.1109/fuzz-ieee.2012.6251348
发表时间:
2012
期刊:
2012 IEEE International Conference on Fuzzy Systems
影响因子:
--
作者:
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通讯作者:
Y. Hata
DOI:
--
发表时间:
2012
期刊:
2012 Fifth International Conference on Emerging Trends in Engineering and Technology
影响因子:
--
作者:
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通讯作者:
Y. Hata
DOI:
--
发表时间:
2009
期刊:
--
影响因子:
--
作者:
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通讯作者:
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