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压电振动能量收集装置研究现状及发展趋势 总被引：2，自引：1，他引：1
摘要：随着无线技术及微机电技术的日益发展,以化学电池为主的供能方式的弊端日渐显露,压电振动能量收集装置以其结构简单、清洁环保及易于微型化等诸多优点而得到了极大重视。本文从振动能量收集常用的压电材料及其压电性入手,从压电振动能量收集装置的结构设计和能量收集电路设计两方面对其进行阐述。在结构设计方面,以压电振动能量收集结构的方向性和响应频带为主线,详细介绍了国内外研究者在压电振动能量收集装置结构设计上的变化与创新;在能量收集电路设计方面,以能量收集效率的提高为主线,介绍了电路结构的优化改进。最后,总结了压电振动能量收集装置未来的研究趋势和方向,为从事压电振动能量收集研究的人员提供参考。 相似文献
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Zhi Zhou Haixiong Tang Henry A. Sodano 《Advanced materials (Deerfield Beach, Fla.)》2014,26(45):7547-7554
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Shubhi Bansal Christabel Choi James Hardwick Biswajoy Bagchi Manish K. Tiwari Sriram Subramanian 《Advanced Engineering Materials》2023,25(4):2370017
Conventional energy sources are continuously depleting, and the world is actively seeking new green and efficient energy solutions. Enormous amounts of acoustic energy are dissipated daily, but the low intensity and limited efficiency of current harvesting techniques are preventing its adoption as a ubiquitous method of power generation. Herein, a strategic solution to increase acoustic energy harvesting efficiency using a specially designed metamaterial is implemented. A scalable transmissive labyrinthine acoustic metamaterial (LAM) is designed, developed, and employed to maximize ultrasound (40 kHz) capture over its large surface area (>27 k mm2), which is focused onto a piezoelectric film (78.6 mm2), thus magnifying incident sound pressure by 13.6 times. Three different piezoelectric films – two commercial and one lab-made nanocomposite film are tested with LAM in the acoustic energy harvesting system. An extraordinary voltage gain of 157–173% and a maximum power gain of 272% using the LAM compared to the case without the LAM are achieved. Multipoint focusing using holographic techniques, showcasing acoustic patterning to allow on-demand simultaneous harvesting in separate locations, is demonstrated. Our versatile approach for high-intensity acoustic energy harvesting opens future opportunities to exploit sound energy as a resource to contribute toward global sustainability. 相似文献
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Lin Dong Andrew B. Closson Congran Jin Ian Trase Zi Chen John X. J. Zhang 《Advanced Materials Technologies》2019,4(10)
Vibration‐based energy‐harvesting technology, as an alternative power source, represents one of the most promising solutions to the problem of battery capacity limitations in wearable and implantable electronics, in particular implantable biomedical devices. Four primary energy transduction mechanisms are reviewed, namely piezoelectric, electromagnetic, electrostatic, and triboelectric mechanisms for vibration‐based energy harvesters. Through generic modeling and analyses, it is shown that various approaches can be used to tune the operation bandwidth to collect appreciable power. Recent progress in biomechanical energy harvesters is also shown by utilizing various types of motion from bodies and organs of humans and animals. To conclude, perspectives on next‐generation energy‐harvesting systems are given, whereby the ultimate intelligent, autonomous, and tunable energy harvesters will provide a new energy platform for electronics and wearable and implantable medical devices. 相似文献
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Energy conversion based on vertically aligned piezoelectric nanowire (NW) arrays is of great interest because of their unusual properties originating from large surface area/high aspect ratio and excellent piezoelectric properties. Here, perovskite‐structured piezoelectric BaTiO3 NW arrays are vertically grown onto the flexible Ti substrates by a two‐step hydrothermal reaction to realize an aligned 1D nanostructures‐based flexible energy harvester. The BaTiO3 NW array‐based flexible piezoelectric energy harvester (PEH) successfully converts a maximum open‐circuit voltage of ≈15 V, a maximum short‐circuit current of ≈400 nA, and an effective power of ≈0.27 µW during repeated bending deformations. Under pressing with an external force of 49.57 N, the harvested output signals of the vertically aligned NW arrays‐based PEH are ≈20 V and ≈60 nA. Finite element analysis with multiphysics simulation supports the hypothesis of effective potential generation by the NW arrays‐based flexible PEH. These results can aid in the further development of high‐output 1D nanostructures‐based flexible PEHs. 相似文献
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压电振动能采集器是无线传感节点的一种理想电源,近年来受到广泛关注．考虑质量块和逆压电效应影响,建立了在基础激励作用下的悬臂梁压电振动能采集器的集总参数运动微分方程,得到了采集器固有频率的解析表达式．引入了2个反映压电层连接方式的常数,建立了对单压电层、双压电层并联和双压电层串联的悬臂梁压电振动能采集器均适用的耦合电路方程．求解以上方程,得到了简谐基础激励下的输出电压表达式．实验结果表明,固有频率和输出电压表达式的相对误差分别小于10％和20％． 相似文献
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Peter C. Sherrell;Anna Šutka;Martin Timusk;Andris Šutka; 《Small (Weinheim an der Bergstrasse, Germany)》2024,20(32):2311570
Fluoropolymers, including polytetrafluoroethylene (PTFE, Teflon), polyvinylidene difluoride (PVDF), and fluorine kautschuk materials (FKMs, Viton) are critical polymers for applications ranging from non-stick coatings, corrosion resistant seals, semiconductor manufacturing, membranes, and energy harvesting technologies. However, the synthesis of these fluoropolymers requires the use of per- and polyfluorinated alkyl substances (PFAS) known colloquially as “forever chemicals,” and as such there is a pressing need to develop alternative technologies that can serve the end-use of fluoropolymers without the environmental cost of using PFAS. Further, fluoropolymers themselves fall under the PFAS umbrella. Here, alternative mechanical-to-electrical energy harvesting polymers are reviewed and benchmarked against the leading fluoropolymer energy harvesters. These alternative technologies include nonfluoropolymer piezoelectric polymers, triboelectric nanogenerators (TENGs), ferroelectric elastomers, and flexoelectric polymers. A vision towards sustainable, non-fluoropolymer-based energy harvesting is provided. 相似文献
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设计基于同步电感及buck-boost转换器的接口技术—SCEI(Synchronous Charge Extraction and Inversion),完成该接口技术在恒定激振位移、恒定激振力情况下回收功率的理论分析及计算。理论计算表明,在恒定激振位移下忽略buck-boost转换效率时SCEI的回收功率大于Parallel-SSHI技术最大回收功率,且该回收功率与负载无关;在恒定激振力下SCEI回收功率与SECE技术特性相似;通过实验比较设计的SCEI技术与4种经典技术在相同激振位移下的回收功率。实验结果表明,SCEI技术回收功率约为SECE的1.5倍,且与负载无关。 相似文献
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Srivathsan Ravi Andreas Zilian 《International journal for numerical methods in engineering》2017,112(12):1828-1847
The successful design of piezoelectric energy harvesting devices relies upon the identification of optimal geometrical and material configurations to maximize the power output for a specific band of excitation frequencies. Extendable predictive models and associated approximate solution methods are essential for analysis of a wide variety of future advanced energy harvesting devices involving more complex geometries and material distributions. Based on a holistic continuum mechanics modeling approach to the multi‐physics energy harvesting problem, this article proposes a monolithic numerical solution scheme using a mixed‐hybrid 3‐dimensional finite element formulation of the coupled governing equations for analysis in time and frequency domain. The weak form of the electromechanical/circuit system uses velocities and potential rate within the piezoelectric structure, free boundary charge on the electrodes, and potential at the level of the generic electric circuit as global degrees of freedom. The approximation of stress and dielectric displacement follows the work by Pian, Sze, and Pan. Results obtained with the proposed model are compared with analytical results for the reduced‐order model of a cantilevered bimorph harvester with tip mass reported in the literature. The flexibility of the method is demonstrated by studying the influence of partial electrode coverage on the generated power output. 相似文献
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Zhuzhu Shao Xuan Zhang Zihan Song Jingfeng Liu Xingang Liu Chuhong Zhang 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(38):2303285
Electrospun polyvinylidene fluoride (PVDF) piezoelectric fibers have high potential applicability in mechanical energy harvesting and self-powered sensing owing to their high electromechanical coupling capabilities. Strategies for tailoring fiber morphology have been the primary focus for realizing enhanced piezoelectric output. However, the relationship between piezoelectric performance and fiber structure remains unclear. This study fabricates PVDF hollow fibers through coaxial electrospinning, whose wall thickness can be tuned by changing the internal solution concentration. Simulation analysis demonstrates an increased effective deformation of the hollow fiber as enlarging inner diameter, resulting in enhanced piezoelectric output, which is in excellent agreement with the experimental results. This study is the first to unravel the influence mechanism of morphology regulation of a PVDF hollow fiber on its piezoelectric performance from both simulation and experimental aspects. The optimal PVDF hollow fiber piezoelectric energy harvester (PEH) delivers a piezoelectric output voltage of 32.6 V, ≈3 times that of the solid PVDF fiber PEH. Furthermore, the electrical output of hollow fiber PEH can be stably stored in secondary energy storage systems to power microelectronics. This study highlights an efficient approach for reconciling the simulation and tailoring the fiber PEH morphology for enhanced performances for future self-powered systems. 相似文献
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为更好的预测驰振压电能量收获机的性能,首先建立了等效电路仿真模型（ECM）并通过实验验证,最大误差不超过10%。采用该方法分析了被动湍流控制（PTC）下圆柱驰振压电能量收集的仿真模型,且该方法可将驰振能量转化系统的质量-弹簧-阻尼（M-C-K）控制方程中各参数用等效电路的电子元件来表示,从而可以分析过往仿真手段所不能解决的直流电路耦合问题。其次,从能量收集效率角度分析了交流-直流等效电路中临界风速(Ucr)随外接载荷的变化规律,及输出电压与功率随不同风速和外界载荷的变化规律。结果表明,交流电路中Ucr随载荷的增大先增大后减小,直流电路中Ucr随载荷的增大逐渐减小。当风速达到Ucr的最大值时,驰振在任一电阻下均会发生。U≥Ucr时,驰振出现锁定现象,输出电压和功率均随着风速的增大而增大。当风速过大时,增长率有减小趋势。输出电压均随着电阻的增大而增大,功率随电阻的增大先增大后减小。相比于交流电路,直流电路的最佳负载由1.1 MΩ提高到2.0 MΩ,同时功率峰值从0.08 mW降低到0.04 mW。 相似文献
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Gang Jian Yong Jiao Qingzhen Meng Hui Shao Fengwei Wang Zhaoyu Wei 《Advanced Materials Interfaces》2020,7(16)
Piezoelectric nanogenerators (PENGs) with good flexibility and high outputs have promising applications in harvesting mechanical energy and powering electronics. In this study, a synthesis of hierarchical BaTiO3 flowers (BTFs) and their filling into the polydimethylsiloxane (PDMS) matrix to obtain composites with excellent energy harvesting properties is reported. The BTF‐based PENG possesses a voltage of 260 V, a current of 50 µ A, and a power of 1728 µ W under a compression of 50 N at 3.5 Hz, which output power is two orders higher than that of polymer composites filled with BT nanoparticles. Simulation indicates that the high local stress at petals of BTFs is the main reason for the enhanced performances. The PENG shows good durability under 5000 cycles and lights up 58 commercial light emitting diodes and a display. The PENG generates 30–100 V in harvesting human motions of hand slapping and foot stepping and ≈50 V in harvesting the sport kinetic energy of basketball bouncing. This research presents a BTF‐based PENG with significantly enhanced energy harvesting performances for applications in micro/nanoenergy systems. 相似文献
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Energy harvesting technology may be considered an ultimate solution to replace batteries and provide a long‐term power supply for wireless sensor networks. Looking back into its research history, individual energy harvesters for the conversion of single energy sources into electricity are developed first, followed by hybrid counterparts designed for use with multiple energy sources. Very recently, the concept of a truly multisource energy harvester built from only a single piece of material as the energy conversion component is proposed. This review, from the aspect of materials and device configurations, explains in detail a wide scope to give an overview of energy harvesting research. It covers single‐source devices including solar, thermal, kinetic and other types of energy harvesters, hybrid energy harvesting configurations for both single and multiple energy sources and single material, and multisource energy harvesters. It also includes the energy conversion principles of photovoltaic, electromagnetic, piezoelectric, triboelectric, electrostatic, electrostrictive, thermoelectric, pyroelectric, magnetostrictive, and dielectric devices. This is one of the most comprehensive reviews conducted to date, focusing on the entire energy harvesting research scene and providing a guide to seeking deeper and more specific research references and resources from every corner of the scientific community. 相似文献
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Caixia Hu Li Cheng Zhe Wang Youbin Zheng Suo Bai Yong Qin 《Small (Weinheim an der Bergstrasse, Germany)》2016,12(10):1315-1321