研究了产生超声波的机理及器件性能，分析了超声源驱动电路的组成和工作原理。
Studied the mechanism of how to produce ultrasonic and the functions of the machine, analyzed the ultrasonic driven circuit and its principle of working.
但由于传统的压电传感器存在着空气与普通的压电材料之间严重不耦合现象，所以压电传感器并不是高效率的超声源。
The traditional PZT, however, is not the ultrasonic source with high efficiency because of the serious non-coupling phenomena between air and ordinary piezoelectric material.
本文主要介绍了超声多普勒胎心仪超声源检定项目、技术要求及检定方法并介绍了所需要的测量装置，对测量过程进行了阐述。
This paper mainly introduces ultrasonic Doppler baby's heart instrument verification item and technical requirement and verification technique, introduces the equipment and process for determination.
本文提出一种利用脉冲激光产生可重复的宽带标准声源、对超声换能器的速度灵敏度进行标定的新方法—激光超声法。
A new method for calibration of velocity sensitivity of ultrasonic transducers with a wide band standard acoustic source generated by a pulsed laser is proposed.
这里发生相对运动的是血中的红细胞和超声换能器的声源。
Here the relative moving is between the RBC (red blood cell) in the blood and the source of the ultrasound transducer.
幅射瞬态脉冲波的圆形活塞声源在超声检测中得到广泛应用。
The acoustic source of plane circular pistons with the radiating transient pulse wave finds wide application in the ultrasonic inspection and test.
为了解超声清洗等应用中常用超声换能器激励的板声源的振动特性，使用有限元方法对其进行了研究，并通过实验验证了仿真结果。
In this paper, vibration characteristics of plate sound source driven by transducer commonly used in ultrasonic cleaning are analyzed with the finite element method.
为了解超声清洗等应用中常用超声换能器激励的板声源的振动特性，使用有限元方法对其进行了研究，并通过实验验证了仿真结果。
In this paper, vibration characteristics of plate sound source driven by transducer commonly used in ultrasonic cleaning are analyzed with the finite element method.
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