Echo Sounder is a kind of acoustic measuring depth equipment, which can measure depth with the time between transmitted wave and echo on condition in which the speed of ultrasonic is fixed.
回声测深仪是用来测量水深的一种声学测量设备，其以水中超声波的传播速度为确定条件，利用发射波与反射回波时间差来测量水深。
Ultrasonic method for oil film thickness measurement is discussed in this paper, including the pulse echo method and the continuous wave method.
本文对超声波油膜厚度测量法进行了探讨。它包括脉冲反射法和连续波法。
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。
An instrument for measuring ultrasonic attenuation by means of comparing the ultrasonic pulse echo with a calibrated exponential decay wave-form is described.
本装置用超声脉冲回波与定标指数波形比较的方法测量超声衰减。
This paper presents the development of a pulse-echo measurement method, based on the use of a phase spectrum to determine the ultrasonic wave velocity. A detailed descripsion of the theory is given.
本文报道了一种基于脉冲回波相位谱的超声波速度测量方法，并给出了它的详细理论推导过程。
This paper presents the development of a pulse-echo measurement method, based on the use of a phase spectrum to determine the ultrasonic wave velocity. A detailed descripsion of the theory is given.
本文报道了一种基于脉冲回波相位谱的超声波速度测量方法，并给出了它的详细理论推导过程。
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