该波形发生器已经成功地应用于超声波发射换能器中。
This waveform generator has been successfully applied in ultrasonic sen - sor to generate high-frequency ultrasonic wave.
文中简要叙述了换能器的工作原理与构成，给出了测量系统的设计与工作流程，并对主要的超声波发射与接收电路作了说明。
The principle and construction of the transducer are briefly presented and the working principle, design of the system as well as the main generator and detector circuit are introduced in the paper.
通过超声波测试仪发射和接收换能器信号，输出的电压信号送入计算机的A/D卡。
We emit and receive signals fromtransducers by using Measuring Ultrasound Equipment, and then put continent voltages to the A/D card in the computer.
该换能器发射不平行于穿过该容器的主要流体流的超声波进入流体。
The transducer emits ultrasonic waves into the fluid that are not parallel to the primary flow of fluid through the tank.
一声频定向换能器，以定向发射超声波给接听者，其中该超声频段部分经空气自解调而还原为原音频信号。
Because the ultrasonic wave has the directivity, the audible audio frequency demodulated from the interior of the ultrasonic wave also has the directivity and forms a directional audible sound.
一声频定向换能器，以定向发射超声波给接听者，其中该超声频段部分经空气自解调而还原为原音频信号。
Because the ultrasonic wave has the directivity, the audible audio frequency demodulated from the interior of the ultrasonic wave also has the directivity and forms a directional audible sound.
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