scholarly journals Research and Fabrication of High-Frequency Broadband and Omnidirectional Transmitting Transducer

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2347 ◽  
Author(s):  
Shaohua Hao ◽  
Hongwei Wang ◽  
Chao Zhong ◽  
Likun Wang ◽  
Hao Zhang
Keyword(s):  
Composite Material ◽  
High Frequency ◽  
Wide Band ◽  
Simulation Software ◽  
Piezoelectric Composite ◽  
Voltage Response ◽  
Forming Process ◽  
Composite Ring ◽  
Matching Layer ◽  
Acoustic Transducer

A wide-band cylindrical transducer was developed by using the wide band of the composite material and the matched matching layer for multimode coupling. Firstly, the structure size of the transducer’s sensitive component was designed by using ANSYS simulation software. Secondly, the piezoelectric composite ring-shaped sensitive component was fabricated by the piezoelectric composite curved-surface forming process, and the matching layer was coated on the periphery of the ring-shaped piezoelectric composite material. Finally, it was encapsulated and the electrodes were drawn out to make a high-frequency broadband horizontal omnidirectional water acoustic transducer prototype. After testing, the working frequency range of the transducer was 230–380 kHz, and the maximum transmission voltage response was 168 dB in the water.

scholarly journals Design and Fabrication of a Stacked Three-Phase Piezoelectric Composites Ring Array Underwater Ultrasound Transducer

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 5971
Author(s):  
Lili Xia ◽  
Hongwei Wang ◽  
Qiguo Huang
Keyword(s):  
Simulation Software ◽  
Piezoelectric Composite ◽  
Ultrasound Transducer ◽  
Voltage Response ◽  
Open Angle ◽  
Sound Waves ◽  
Forming Process ◽  
Piezoelectric Composites ◽  
Composite Ring ◽  
Three Phase

A stacked three-phase piezoelectric composites ring array underwater ultrasound transducer was developed in this paper. The circular structure of three-phase piezoelectric composite with a large open angle was improved based on the 1-3 piezoelectric composites. The structure size of the transducer’s sensitive component was designed by using ANSYS simulation software, and the single-ring samples of three-phase piezoelectric composites with different thicknesses were fabricated. Based on the bandwidth broadening theory of multimode coupled vibration, the piezoelectric composite ring-shaped sensitive component was fabricated by the piezoelectric composite curved-surface-forming process. According to the design structure of the transducer, the stacked three-phase piezoelectric composites ring array underwater ultrasound transducer was processed. The experimental results show that the maximum transmission voltage response is 154 dB, the open angle of the horizontal beam reaches 360°, and the bandwidth of −3 dB is 86 kHz. The developed transducers achieved a high frequency, broadband, and large open angle to radiate sound waves.

scholarly journals An Improved Equivalent Circuit Simulation of High Frequency Ultrasound Transducer

2021 ◽  
Vol 8 ◽  
Author(s):  
Zhitian Shen ◽  
Jie Xu ◽  
Zhangjian Li ◽  
Youwei Chen ◽  
Yaoyao Cui ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
High Frequency ◽  
Circuit Simulation ◽  
Simulation Software ◽  
Ultrasound Transducer ◽  
Ultrasound Transducers ◽  
High Frequency Ultrasound ◽  
Matching Layer ◽  
Backing Layer ◽  
Frequency Ultrasound

The equivalent circuit simulation plays an important role in the design of ultrasound transducer. However, the existing methods are difficult to achieve the effect of matching and backing layer, and not able to accurately simulate the transducer with cable. Especially in the application of high frequency ultrasound, the long cable has a great influence on the performance of the transducer. To overcome these limitations, this paper proposed an improved equivalent circuit method, which combined Leach model and transmission line model. It can realize the complete simulation of ultrasound transducer with a long cable, matching layer, and backing layer in PSPICE circuit simulation software when the parameters were measured. Its principles were briefly introduced, and ultrasound transducers with different frequencies (12 and 20 MHz), different matching layers, and different cable lengths (0.5–2.5 m) were designed and fabricated to verify the effectiveness of the method, which is also compared with the traditional KLM method using PiezoCAD. The experiment results showed that the long cable, matching layer, and backing layer have a significant impact on the performance of high frequency ultrasound transducers, and this proposed method has good agreement with these results. Moreover, for the simulation of the complete transducer, the effect of this method is better than KLM model. Besides, this method does not need to know the specific equivalent circuit of matching, backing layer, or cable wire, it can accurately predict the impedance and phase of the transducer through the material parameters, which is very helpful for the material selection and optimization of subsequent transducer design and fabrication. The study indicates that this improved equivalent circuit method is suitable to be applied in the general circuit simulation software and provides strong support for the high frequency transducer and system design.

scholarly journals A Thickness-Mode High-Frequency Underwater Acoustic Transducer with a Low Sidelobe Level

Actuators ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 226
Author(s):  
Hui Zhao ◽  
Haisen Li ◽  
Yan Wang ◽  
Zhenjun Liu ◽  
Jiacong Bian ◽  
...  
Keyword(s):  
High Frequency ◽  
Vibration Mode ◽  
Simulation Analysis ◽  
Simulation Method ◽  
Voltage Response ◽  
Sidelobe Level ◽  
Element Simulation ◽  
Low Sidelobe ◽  
Acoustic Transducer ◽  
High Frequency Transducer

Thickness vibration mode is commonly used for high-frequency transducers. For disc piezoelectric ceramics, there is no ideally pure thickness vibration mode because the coupling between the radial and thickness modes always exists. Furthermore, it also deteriorates the transmission voltage response and directivity of the high-frequency transducer. In this paper, based on the theoretical calculation and finite element simulation method, a new method was proposed, and the related experiment was carried out to convince this idea. Both the simulation analysis and experimental results show that drilling a hole at the center of piezoelectric vibration is a simple but effective method to obtain a pure thickness vibration mode of the disc piezoelectric ceramic, and then improve the transmitting ability and directivity of the high-frequency piezoelectric transducer. The sidelobe level is as low as −21.3 dB.

A 300 kHz High-Frequency Underwater Transducer

2009 ◽  
Vol 79-82 ◽  
pp. 259-262
Author(s):  
Gang Wang ◽  
Lei Qin ◽  
Li Kun Wang
Keyword(s):  
High Frequency ◽  
Piezoelectric Ceramic ◽  
Ultrasonic Transducer ◽  
Piezoelectric Composite ◽  
Radial Vibration ◽  
Ceramic Tube ◽  
Acoustic Transducer ◽  
Underwater Transducer ◽  
Working Frequency ◽  
Ceramic Cylinder

A new type of piezoelectric composite ultrasonic transducer with high frequency in radial vibration is studied. A high-frequency acoustic transducer has been designed and prepared with pzt-5-type piezoelectric ceramic cylinder. When the piezoelectric ceramic cylinder vibrates along the direction of its radial direction, the working frequency is high. It is composed of a piezoelectric ceramic tube and a steel bracket which is inserted in the inner of the ceramic tube. Use the finite element method by ANSYS for analyzing the radial vibration of a piezoelectric tube. On that basis, through managing ANSYS simulation the vibration mode of transducer system is obtained, and analyzed the working frequency of transducer. According to the simulation, the high-frequency cylindrical acoustic transducer has been produced. Comparing the products and the traditional cylindrical transducers, the products haven’t only a good all-round circle directional, but it also has a high working frequency (300 kHz).

scholarly journals Optimizing the Directionality and Minimizing the Reflections using Lenses

2019 ◽  
Vol 9 (2) ◽  
pp. 5146-5151
Keyword(s):  
High Frequency ◽  
Parallel Plate ◽  
Wide Band ◽  
Ultra Wide Band ◽  
Frequency Range ◽  
Leaky Waves ◽  
Matching Layer ◽  
Directional Radiation ◽  
Parallel Plate Waveguide ◽  
Minimum Bandwidth

In antenna propagation waves should be guided from leakages and directionality which has became more essential now a days due to number of hurdles which scatters the signal. In this paper we design a leaky lens antenna of UWB frequency and simulate that using CST tool in parallel plate waveguide that works efficiently in high frequency range of 6-30GHz. This approach is totally based on propagation of leaky waves by focusing on the lenses properties. Eventually we increase the gap between the lens and slot for optimal directivity in antenna and then for optimizing the transmission coefficient and minimizing the reflection we use the Matching layer in it. As a result directional radiation will be obtained which is much more achieved than any other antenna of Ultra Wide Band Range and the minimum bandwidth is required which is less than -10dB for radiation

scholarly journals Study on Underwater Performance of Underwater Transducer Manufactured by 1-1-3 Piezoelectric Composite

2019 ◽  
Vol 37 (2) ◽  
pp. 386-392
Author(s):  
Haibo Du ◽  
Lei Qin ◽  
Chao Zhong ◽  
Likun Wang
Keyword(s):  
Sound Source ◽  
Piezoelectric Composite ◽  
Voltage Response ◽  
Voltage Sensitivity ◽  
The Finite Element Method ◽  
Vibration Displacement ◽  
Matching Layer ◽  
Underwater Transducer ◽  
High Frequency Transducer ◽  
Source Level

A novel kind of underwater transducer with trapezoidal matching layer manufactured by 1-1-3 piezoelectric composite has been proposed to improve the underwater performance of high frequency transducer. In this paper, the finite element method has been used to analyze the influence of the matching layer on the electrical properties of the composite materials and vibration displacement of the radiation area. Two kinds of underwater transducers with and without matching layers have been fabricated. The experimental results show that the transmission voltage response of the underwater transducer with matching layer reaches 169.4 dB at 360 kHz, and the receiving voltage sensitivity reaches-190 dB, the bandwidth is up to 70 kHz and the maximum sound source level is 208 dB. Comparing with transducer without matching layer, the transmission voltage response is increased by 3.8 dB. Meanwhile the sound source level is increased by 6 dB. The received bandwidth is increased by 1.45 times.

Development of Underwater Acoustic Transducer Using 1-3-2 Piezoelectric Composite

2013 ◽  
Vol 433-435 ◽  
pp. 211-216
Author(s):  
Li Li ◽  
Li Kun Wang ◽  
Lei Qin
Keyword(s):  
Beam Width ◽  
Piezoelectric Composite ◽  
Voltage Response ◽  
Voltage Sensitivity ◽  
Frequency Range ◽  
Element Analysis ◽  
Rigid Foam ◽  
Acoustic Transducer ◽  
Source Level ◽  
Copper Shell

The flat transducer is composed of 1-3-2 piezoelectric composite and copper shell. The structure of transducer was determined according to design requirement and finite element analysis by ANSYS. The transducer was prepared by using a 25mm×25mm×4.8mm 1-3-2 composite chip, rigid foam backing, copper shell, polyurethane layer and acoaxial cable. The voltage response, source level, receiving voltage sensitivity and other performance were measured. The resonant frequency of transducer is 294kHz, the maximum transmitting voltage response is 159.6dB, 3dB bandwidth is 32kHz, source level is 208dB, receiving voltage sensitivity of the transducer is -203 ± 3dB in the frequency range of 50-250kHz frequency, the beam width of -3dB is 11º in the directivity.

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