| 周胜友,熊刚,史永刚.超声波多次回波反射法测量油料密度技术研究*[J].,2019,38(3):392-397 |
| 超声波多次回波反射法测量油料密度技术研究* |
| Technology research on oil density measurement based on ultrasonic multiple echo reflection method |
| 投稿时间：2019-01-03 修订日期：2019-04-25 |
| 中文摘要: |
| 本文通过同时测量油料的声阻抗和声速,来测量油料的密度。通过对超声波在不锈钢壁内的多次反射回波信号作快速傅里叶变换（FFT），取各次回波信号中心频率下的幅值在对数坐标系下作数据拟合，由拟合曲线斜率并结合多次反射理论求得油料的声阻抗；测量由聚苯乙烯壁面反射回来的二次回波信号计算油料的声速。实验中将温度控制在20℃，测量了8种油料的声阻抗和声速，进而求出8种油料的密度。实验结果表明8种油料密度测量结果的最大误差为1.2%。该方法适合油料密度在线、快速、准确测量。 |
| 英文摘要: |
| This paper presented an oil density measurement method by measuring the acoustic impedance and sound velocity of the oil. The amplitude at a certain frequency can be obtained by the fast Fourier transform of each echo. The velocity of sound in the solution was determined by the time-of-flight between the first echo reflected from the polystyrene-oil interface and the second echo which transmitted through the sample and reflected from the stainless steel-oil interface. In the experiment, the temperature was controlled at 20°C, and the acoustic impedance and sound velocity of the eight oils were measured, and the density of the oil in the eight oils was obtained. The experimental results show that the maximum error in the measurement of density of gasoline, diesel and jet fuel does not exceed 1.2%.This method is suitable for the on-line, rapid, and accurate measurement of the oil density. |
| DOI：10.11684/j.issn.1000-310X.2019.03.015 |
| 中文关键词: 超声波,声阻抗,油料, 密度 |
| 英文关键词: ultrasonic, acoustic, oil, density |
| 基金项目:军需能源局项目 (YX216J014) |
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