Page 110 - 201903

第 38 卷 第 3 期 Vol. 38, No. 3
2019 年 5 月 Journal of Applied Acoustics May, 2019

⋄ 研究报告 ⋄

超声波多次回波反射法测量油料密度技术研究 ∗

周胜友 1 熊 刚 1† 史永刚 2

(1 陆军勤务学院油料系 重庆 401331)
(2 陆军勤务学院大型仪器装备管理中心 重庆 401331)

摘要 该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，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 C，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
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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。
关键词 超声波，声阻抗，油料，密度
中图法分类号: TB559 文献标识码: A 文章编号: 1000-310X(2019)03-0392-05
DOI: 10.11684/j.issn.1000-310X.2019.03.015

Technology research on oil density measurement based on ultrasonic multiple
echo reflection method

ZHOU Shengyou 1 XIONG Gang 1 SHI Yonggang 2

(1 Department of Oil, Army Logistic University of PLA, Chongqing 401331, China)
(2 Administration Center of Instruments & Equipment Army Logistic University of PLA, Chongqing 401331, China)

Abstract 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 oil 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,
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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.
Key words Ultrasonic, Acoustic impedance, Oil, Density

2019-01-03 收稿; 2019-03-08 定稿
军需能源局项目 (YX216J014)
∗
作者简介: 周胜友 (1994- ), 男, 四川盐源人, 硕士研究生, 研究方向: 精密测试与油品质量控制。
† 通讯作者 E-mail: xg-gh@sina.com