Finite Element Analysis of Lead-Free Ceramic Based Cymbal Transducer for Energy Harvesting

Sahi, Yashwardhan; Chandan, Swet

doi:10.1080/10584587.2020.1819037

Cited by 8 publications

(3 citation statements)

References 6 publications

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“…In the reciprocating motion of the mass, the piezoelectric transducer intermittently outputs electric energy. The piezoelectric transducer adopts cymbal structure to improve the electromechanical conversion efficiency [5,6]. The structural diagram is shown in the figure1.…”

Section: Structural Designmentioning

confidence: 99%

Study on a collecting structure for impact energy and its dynamic characteristics

2021

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The impact energy harvesting technology is studied in this paper, a piezoelectric harvesting structure with additional resonant structure including spring mass components is proposed, and the system dynamics model of the structure is studied. The influence of the structural parameters of spring mass block on the system output voltage is studied by using the model. The research results have certain application value for impact energy harvesting.

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Section: Structural Designmentioning

confidence: 99%

Study on a collecting structure for impact energy and its dynamic characteristics

2021

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“…Teng Duo fabricated a circular tube hydroacoustic transducer (Dou et al , 2018) with a maximum receiving sensitivity of −179.1 dB based on tangentially polarized piezoelectric ceramics. Sashi Yashwardhan developed a dual piezoelectric ceramic plate cymbal transducer with two piezoelectric ceramic plates of lead-free and leaded types (Sahi and Chandan, 2020) and studied the characteristics of the two piezoelectric ceramics based on ensuring the high sensitivity of the cymbal transducer, which is an important reference value for the subsequent research on cymbal transducer materials. However, the structure of previous types of hydroacoustic transducers is complicated, the cost is high and the receiving sensitivity of hydroacoustic transducers made of piezoelectric ceramics can be further improved.…”

Section: Introductionmentioning

confidence: 99%

Research on a stacked high-sensitivity hydroacoustic transducer

Tian

Wang

2023

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Purpose Island attack and defense, emergency rescue, scientific research, civilian fisheries and other fields are inseparable from timely, high-quality underwater communications. However light and other electromagnetic waves are severely attenuated in water, acoustic is currently the only energy carrier that can transmit signals over long distances in water. However, the complex water environment and serious interference bring serious challenges to underwater activities using underwater acoustic sensors-hydroacoustic transducers. Thus, this paper aims to develop a class of high reception sensitivity hydroacoustic transducer structures to provide research and utilization ideas for related scholars. Design/methodology/approach The electromechanical coupling coefficient is improved by converting the thickness vibration mode of the piezoelectric ceramic into the longitudinal vibration mode of the piezoelectric pillars array, and no polymer is added between the piezoelectric pillars array to reduce lateral coupling as well as internal friction, which can thus reduce the energy losses. Radial stacking in parallel can also enhance the charge generated through the positive piezoelectric effect. The optimal parameters of the structure are determined by equivalent circuit method and finite element analysis, and a hydroacoustic transducer of this structure is fabricated finally. Findings According to the standard test procedure, the hydroacoustic transducer was tested in water. The tests show that the conductance curve of the stacked high-sensitivity hydroacoustic transducer tested in the air is in good agreement with the simulation results. The resonant frequency is about 118 kHz, and the receiver sensitivity is −166 dB. The stacked material hydroacoustic transducer is in the high-frequency range and has a much higher sensitivity (−166 dB) than many types of hydroacoustic transducers fabricated by piezoelectric ceramic (less than −200 dB). Research limitations/implications Although the stacked high-sensitivity hydroacoustic transducer that the authors have fabricated has a performance improvement, it has a limitation. The hollow design of the pillar arrays increases the reception stress on each pillar, and the imposed pressure comes from water also increases simultaneously, so the depth of water that the stacked high-sensitivity hydroacoustic transducer can operate in may be slightly shallower than that made of a pure piezoelectric ceramic block or a piezoelectric ceramic material with polymer added. This will be a problem to be solved in a future deployment. Practical implications Whether it is marine scientific research or in various fields such as civil recreation and fishing, hydroacoustic communication and necessary underwater exploration are indispensable for acoustic waves. The hydroacoustic transducer is the sensor that sends and receives sound waves, so a lot of water equipment, such as yachts, sonar buoys, and so on, cannot be separated from the hydroacoustic transducer. In addition, the complexity of the water environment also requires a good performance of the hydroacoustic transducer to facilitate the convenience and effectiveness of subsequent signal processing. Therefore, hydroacoustic transducers have great market and commercial value. Social implications Hydroacoustic transducers are not only of great commercial value but also have a significant impact on the military as well as on people’s livelihood. As we all know, in the area of submarine communication and underwater exploration, sonar is the main force. The performance of the hydroacoustic transducer directly affects the performance of the hydroacoustic signal processing system, and ultimately directly determines the success or failure of the mission. In addition, the large-scale replacement of hydroacoustic transducers on equipment requires the concerted efforts of a large number of practitioners, such as material scientists, structural scientists, mathematicians and so on. Therefore, the rise of hydroacoustic transducers has given rise to a large number of learning positions as well as employment positions. Originality/value To enhance the reception sensitivity of the hydroacoustic transducer, the authors have optimized the existing hydroacoustic transducer materials and structures to propose a stacked sensitive element, which can effectively enhance the electromechanical conversion coefficient of the piezoelectric material. Furthermore, the authors have manufactured a hydroacoustic transducer using the proposed stacked sensitive element. The test results of the hydroacoustic transducer also show that the designed stacked sensitive element is of great help to enhance the reception sensitivity of the hydroacoustic transducer.

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“…At present, there are many studies on piezoelectric energy harvesters. The common energy harvesters are cantilever beam type [11][12][13][14][15], cymbal type [16][17][18], multilayer stack type [19,20], bridge type [21,22], arch type [23][24][25], etc., and there are new energy harvesters [26][27][28][29] 2,201,2424 made of composite materials, such as piezoelectric fiberboard (MFC), polyvinylidene fluoride (PVDF), and piezoelectric film.…”

Section: Introductionmentioning

confidence: 99%

Design of an Energy Harvester Based on a Rubber Bearing Floating Slab Track

Yu,

Li,

Jin

et al. 2023

Applied Sciences

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It is known that a large amount of vibration mechanical energy will be generated during train operation. If the mechanical energy can be obtained from the track structure, it can greatly optimize the energy configuration of the metro. Currently, most sensors are limited to disk or cymbal structures and are not used in the track bed; different from existing structures, this paper designs a spherical energy harvester based on a rubber bearing floating slab track, wherein the size range of the spherical energy harvesting structure was approximately determined based on the geometric spatial relationships of the actual track bed internal structure. Compared to the traditional disk and cymbal energy harvesters, the mechanical and electrical properties of the spherical energy harvesting structure was studied by a numerical simulation method, and the optimal size of the spherical energy was determined by calculation. The main conclusions are as follows: (1) Compared with the traditional disk harvester and cymbal harvester, the spherical harvester had better mechanical and electrical properties. (2) By calculating the output power of energy harvesters under load matching, we found that the output power of the spherical harvester was two orders of magnitude higher than that of the disk harvester and 53% higher than that of the cymbal harvester. (3) The optimum size of the spherical harvester was when the thickness of piezoelectric layer was 2 mm, the radius was 16 mm, the axial ratio of the spherical shell was 0.4, and the thickness of the spherical shell was 4 mm.

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Finite Element Analysis of Lead-Free Ceramic Based Cymbal Transducer for Energy Harvesting

Cited by 8 publications

References 6 publications

Study on a collecting structure for impact energy and its dynamic characteristics

Study on a collecting structure for impact energy and its dynamic characteristics

Research on a stacked high-sensitivity hydroacoustic transducer

Design of an Energy Harvester Based on a Rubber Bearing Floating Slab Track

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