| 超细颗粒悬浊液超声衰减谱与声速谱测量研究 |
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| 引用本文： | 侯怀书,苏明旭,蔡小舒.超细颗粒悬浊液超声衰减谱与声速谱测量研究[J].仪器仪表学报,2010,31(2). |
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| 作者姓名： | 侯怀书 苏明旭 蔡小舒 |
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| 作者单位： | 上海理工大学颗粒与两相流测量技术研究所,上海,200093 |
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| 基金项目： | 国家自然科学基金，上海市纳米计划项目 |
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| 摘 要： | 将短时傅里叶变换应用于超细颗粒两相介质中超声脉冲信号处理和时频谱联合分析,采用变声程方式,提出了一种对超细颗粒两相介质声衰减谱与声速谱同时测量的方法,并对平均粒径281nm的ZnO-H2O悬浊液超声衰减谱与声速谱进行实验研究。
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| 关 键 词： | 超声 短时傅里叶变换 衰减谱 声速谱 |
Study on measurement of ultrasonic attenuation and velocity spectra in superfine particle suspensions |
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| Hou Huaishu,Su Mingxu,Cai Xiaoshu.Study on measurement of ultrasonic attenuation and velocity spectra in superfine particle suspensions[J].Chinese Journal of Scientific Instrument,2010,31(2). |
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| Authors: | Hou Huaishu Su Mingxu Cai Xiaoshu |
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| Abstract: | Short-time fourier Transform (STFT) method is applied in the joint time-frequency analysis of ultrasonic signals in superfine particle suspensions. With ultrasonic path-variation measurement, a method of simultaneous ultrasonic attenuation spectrum and velocity spectrum measurement of superfine particle suspensions is put forward. The ultrasonic attenuation and velocity spectra of aqueous ZnO suspensions with mean particle size 281 nanometer have been drawn by a variable sound-path ultrasonic experimental facility. |
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| Keywords: | ultrasonic short-time Fourier transform (STFT) attenuation spectrum velocity spectrum |
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