发射换能器

一种3-3连结复合压电宽带发射换能器的研究

The Investigation on a Wide-Band 3-3 Connective Composite Piezoelectric Transmitting Transducer

一种新型的压电多层环发射换能器已研制成功。

A new transmitting transducer with piezoelectric layered ring is developed .

以Euler梁为波导耦合的超声发射换能器与接收换能器输入-输出理论分析

Theoretical Analysis of the Input Output of Ultrasonic Transmitting and Receiving Transducers Coupled to Euler Beam Waveguide

压电陶瓷发射换能器的Butterworth匹配定理

A theorem on Butterworth matching for piezoelectric ceramic emission transducer

提出并证明了压电陶瓷发射换能器的Butterworth匹配定理。

A theorem on Butterworth matching for piezoelectric ceramic emission transducer is presented and proved .

介绍了PVDF圆柱型水听器、大面积平板PVDF水听器、钹式换能器、弛豫铁电单晶换能器、小体积低频大功率发射换能器等方面的研究进展。

Much progress has been made in transducers , including cylindrical PVDF hydrophone , plane type PVDF hydrophone , cymbal transducer , relaxor-based piezoelectric single crystals transducer , and low frequency and high power small transducer .

运用设计的声学特性测量系统，以40KHz的平面发射换能器和两个声波探针为传感器，进行了海底沉积物声学特性小距离测量实验。

Based on the acoustic properties measurement system , the seabed sediment acoustic properties on small-gap measurement experiment was carried out using the two probes to be sensors .

发射换能器指向性现场测试仪的设计与实现

The design and realization of projecting transducer directivity pattern field-testing instrument

圆柱形压电陶瓷发射换能器设计

The Design of Underwater Sound Projector of Cylindrical Piezoelectric Ceramic Ring

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 .

弯曲式换能器是一种常用的低频发射换能器，具有小尺寸发射的优点。

The bender transducer is a common low-frequency transducer , which has the advantages of small size .

水声发射换能器及基阵的辐射声场建模与计算声矢量阵指向性

Sound Field Modeling and Calculation for Underwater Acoustic Projecting Transducer and Array Directivity of acoustic vector array

因此，小尺寸化是目前低频大功率发射换能器亟待解决的问题。

Accordingly , small size is the problem of the current low-frequency high-power transmitter that must to be solved .

根据实验研究结果，分析影响声波传输特性的因素，确定载波的最佳传输频率点，为设计合适的井下声波发射换能器及研究合理的声波传输方法提供了依据和指导。

Based on these results , factors were analyzed which affected the acoustic transmission characteristics , the carrier optimal frequencies were determined .

众所周知，低频大功率发射换能器已经成为国内外研究的热点。

As is known to all , low-frequency , high-power transmitter had been the hot point of corresponding researches all over the world .

本文用边界元的方法计算了阵形任意的水声发射换能器共形阵的辐射声场。

The boundary element method is used to calculate the radiated acoustic field of a complicated conformal array of underwater acoustic projecting transducers .

正交偶极子声波测井仪器中的发射换能器是最关键的部件，它决定着该仪器的性能和测量结果。

The transmitting transducer is the most important part of the orthogonal dipole sonic logging tool , which affects the performance and waveforms .

由于声波发射换能器功率有限，提出了使用变幅杆放大声波发射能量的结构设计。

Considering difficult power situation of acoustic emission transducer , the design of horn structure was proposed to use to amplify acoustic emission energy .

实验表明，在相同条件下接收换能器与发射换能器的电性特征一致时接收到的波形基本一致。

Experiments show that , the received waveform shape will be basical same when the launch transducer and receive transducer have the same electronic characteristics .

这种声场计算方法可用于发射换能器阵设计阶段对设计结果进行预报。

The technique presented in this paper can be used to predict the performance of a projecting transducer array at the stage of preliminary design .

然后我需要有人设计发射换能器，同时我也需要有人来设计接收换能器。

Then I needed someone to design the transmitter transducer , but I also needed someone else to design the receiver transducer , which would capture the energy .

浅地层剖面探测是一种基于水声学原理，连续走航式探测方法，可利用高频小能量的声发射换能器震源对应高频声接收换能器获得较高分辨率的剖面。

The shallow profile prospecting is a continuous walking and sailing detection method based on acoustic principles . It can get high resolution profiles with high frequency source .

用边界元理论结合优化方法计算了水声发射换能器共形阵在期望辐射方向性下的振速加权向量，提出了振速的2种加权方式，并给出了计算实例。

The boundary element theory together with optimization method is used to calculate the vibration velocity weighting vector of a complicated conformal array of underwater acoustic projecting transducers for an expected beam pattern .

为了能有效地减小信息窗区域的尺寸，本文为发射换能器和接收换能器分别加装了平凹透镜和方向选择透镜，以此来提高各换能器对声波的指向性。

In order to decrease the area of information windows and improve the directivity of each transducer , the emitter and the receiver are respectively installed with the plano concave lens and the choice direction lens .

超声波发射换能器发射超声波束穿过被测流体，超声波接收换能器把接收到的信号经过放大、滤波处理后转换为电信号，供积算系统积算，最终实现流量的检测。

Ultrasonic transmitter transducer transmitting ultrasonic beams through the test fluid , ultrasonic transducer receiving the signal received and amplified , filtered and converted to electrical signals , the system integrator for integrating , and ultimately flow detection .

通过引入简化假设首先建立起问题的方程，然后借助于多重积分变换方法获得了发射换能器与接收换能器输入－输出关系的频域显式表达式。

Introducing some assumptions , the equations of motion of the problem are first developed . Then , by using multiple integral transform method , the explicit expression for the input output of the transmitting and receiving transducers is obtained in the frequency domain .

用边界元方法，给出了水声发射换能器共形阵各阵元的单元指向性以及基阵的自然波束指向性和束控波束指向性。

The radiation directivity of a complicated conformal array of underwater acoustic transducers is presented based on the boundary element method . It includes the element directivity of each transducer , the natural beam pattern and the controlled beam pattern of the transducer array .

根据声-超声基本原理，以普通压电陶瓷传感器替代商用声发射超声换能器，采用传感器对称布置方式，对具有预冲击脱层损伤的碳-碳复合材料薄板做了声-超声测试。

Acousto ultrasonic ( AU ) measurements were performed on impact damaged carbon carbon composites by using plain piezoelectric transducers putting on thin strips symmetrically , instead of commercial acoustic emission ones .

如果保持发射和接受换能器之间的距离不变，那么不需要测量距离就可以应用声弹性公式。

If we hold the distance unchanged between the emitting transducer and receiving transducer , the acousto-elasticity equation can be used without measuring the distance .

采用多个发射、接收换能器，让声束的交叉域分布在描述流场特性的地方，实现了流场的分区流速测量。

Several transmitter and receiver of acoustic transducers are used to sample the velocity information from the region of intersection of ultrasonic rays which yield typical flow field characteristics .