The result shows that in order to obtain the strong echo signal, a suitable selection of the ultrasonic transducer operating frequency is necessary.
由此表明，选择合适的声发射换能器，有助于提高液位检测回波信号的强度。
The operating principle, the designing and fabricating method of optic fiber magnetostrictive transducer are introduced in the thesis.
本文介绍了磁致伸缩换能器的原理和设计制作方法。
The result shows, under different vibration mode, equivalent parallel capacitance and resistance are not constant value. There is negative damp effect in transducer system at the operating mode.
结果表明，在换能器不同振动模态下，等效并联电容电阻并非恒定值，而且实际支承工况下换能器系统工作时存在负阻尼效应。
The transducer has characteristics of good sensitivity, global and long range inspection, no coupled required, capable of operating with a substantial gap to the material surface and simple structure.
该传感器具有灵敏度和检测效率高、非接触检测和结构简单等主要特点，可广泛应用于各种工业管道、海洋平台结构、杆件、钢丝绳等构件的裂纹、腐蚀或者断丝等缺陷的检测。
Firstly according to the structure of feed, a new orthomode transducer (OMT)is designed, which is key component in feed system, and its operating principle is described.
根据馈源网络的建构方案，在比较过去各种OMT方案的基础上，论文提出了便于馈源各元件连接的OMT结构设计方案，并且简述了其基本工作原理。
Firstly according to the structure of feed, a new orthomode transducer (OMT)is designed, which is key component in feed system, and its operating principle is described.
根据馈源网络的建构方案，在比较过去各种OMT方案的基础上，论文提出了便于馈源各元件连接的OMT结构设计方案，并且简述了其基本工作原理。
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