基于流-固交界面上的伪瑞利波衰减依赖半空间流体性质这一特点,提出了一种利用伪瑞利波幅度测量液位的声学方法,并设计实验对其可行性进行了探讨。首先简要介绍了该方法的理论基础,回顾了前一篇文章的数值模拟工作所得到的重要结论;而后在水槽内进行实验,使用两个源距固定的横波换能器分别激发和接收铝制柱体表面的伪瑞利波,测量了不同液面高度下的脉冲伪瑞利波幅度及其主频偏移,并与数值模拟结果进行了比较。实验结果表明,测量所得的伪瑞利波幅度变化范围略小于数值模拟所得到的结果,但二者在反映变化规律上具有较好的一致性,即:随着液面高度的升高,脉冲伪瑞利波幅度近似呈指数下降,与此同时主频向低频偏移,偏移量近似呈线性规律增大。本文的研究结果从实验上验证了这一检测方法的可行性和有效性。 Based on the fact that the pseudo-Rayleigh wave attenuation at the interface of flow-solid interface depends on the properties of half-space fluid, an acoustic method of measuring the liquid level based on the pseudo Rayleigh wave amplitude is proposed. The feasibility of the experiment is also discussed in the design experiment. First of all, the theoretical basis of the method is briefly introduced. The important conclusions obtained from the numerical simulation of the previous article are reviewed. After that, experiments are conducted in the water tank. Two sources of constant shear wave transducers are used to excite and receive aluminum respectively Pseudo Rayleigh waves on the surface of the cylinder were measured, and the amplitude and the frequency offset of the impulsive Rayleigh waves at different liquid levels were measured. The results were compared with the numerical simulation results. The experimental results show that the range of variation of the pseudo-Rayleigh wave obtained by the measurement is slightly smaller than that obtained by the numerical simulation. However, both of them show good consistency in reflecting the variation law, that is, as the liquid level increases, the pulse The pseudo-Rayleigh amplitude decreases approximately exponentially, while the dominant frequency shifts to low frequency, and the offset increases approximately linearly. The results of this paper verify the feasibility and effectiveness of this method.