That properties of noncontacted measured liquid made liquid level measurement by lamb wave can be used for accurate measurement of liquid level in sealed container.
利用兰姆波进行液位测量，有不接触待测液体的特点，可用于密封容器内液位的准确测量。
The transmission rule of the lamb wave in the structure of the flexible joint is discussed, and the ultrasonic pulse echo is analyzed in the time-field and frequency-field.
本文首先分析了板波诱发纵波在柔性接头构件中的传播规律，对原始回波信号进行时域和频域分析。
In the experiment, both the normal probe and variable Angle probe are used to receive broadband Lamb wave signals.
实验中，采用直探头与可变角探头作为超声波换能器做了接收宽带兰姆波信号的对比。
The mathematical model of the Lamb wave sensor was established on the basis of the partial wave theory and the surface effective permittivity method.
以部分波理论和表面有效介电常数方法为基础，建立了兰姆波传感器的数学模型。
The sensitivity of Lamb wave was analyzed and the working theory of a novel density sensor for liquid based on the Lamb wave technology was presented.
分析了兰姆波对液体密度变化的敏感情况，提出了一种基于兰姆波技术的测量液体密度微小变化声传感器。
The sensor was applied to detect several kinds of laser ultrasonic, such as surface acoustic wave, Lamb wave and longitudinal wave, well-defined waveforms were obtained.
采用该传感器测试了激光超声表面波、兰姆波和纵波，获得了很好的波形。
A low frequency multi mode ultrasonic Lamb wave method suitable for characterizing shear and longitudinal wave velocities, thickness and density of ultra thin elastic layers is presented.
提出了用低频多模式超声兰姆波定征方法来估计超薄弹性层的纵波声速、横波声速、厚度和密度等参数。
To solve these problems, the properties of Lamb wave excited by interdigital transducer in the piezoelectric substrate covered by liquid were studied based on its piezoelectricity and anisotropy.
在考虑晶体的压电性和各向异性基础上，从声的波动理论出发，对叉指换能器在液体-压电晶片界面上兰姆波的激发理论及其性质进行了研究。
To solve these problems, the properties of Lamb wave excited by interdigital transducer in the piezoelectric substrate covered by liquid were studied based on its piezoelectricity and anisotropy.
在考虑晶体的压电性和各向异性基础上，从声的波动理论出发，对叉指换能器在液体-压电晶片界面上兰姆波的激发理论及其性质进行了研究。
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