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| 1 | Response regimes of nonlinear energy harvesters with a resistorinductor resonant circuit by complexification-averaging method显示文摘In this paper, the steady-state response regimes of nonlinear energy harvesters with a resistor-inductor resonant circuit are theoretically investigated. The complexification averaging(CA) method is used to theoretically analyze the energy harvesting performance and reduce the motion equations into a set of first-order differential equations. The amplitudes and phases of both the response displacement and the output voltage are derived, and the corresponding stability conditions are determined. The response regimes are studied with the variation of nonlinear stiffness coefficients and coupling parameters, which are verified by the time domain analysis. The frequency island phenomenon is found and analyzed. Additionally, the backbone curve for deducing the extreme vibration frequency and amplitude is derived. Simultaneously, the analytical expressions of the switching points(critical amplitude and frequency) to identify the hardening and softening properties are established. Accordingly, a criterion is given to determine the occurrence of the jump phenomenon, and its effectiveness is verified. Overall, this paper presents an in-depth theoretical analysis of nonlinear energy harvesters with a resistor-inductor resonant circuit. It presents the theoretical framework and guidance for more extensive evaluations and understanding the theoretical analysis of nonlinear energy harvesters with external circuits. | HUANG DongMei CHEN JiaYi ZHOU ShengXi FANG XueLai LI Wei | 2021 | Science China(Technological Sciences)2021，64，6： | 6 |
| 2 | 压电材料与路面材料一体化发电路面技术研究显示文摘为探索基于压电材料与路面材料一体化的发电路面,优选性能良好压电材料制备压电发电沥青混凝土并检验其路用性能,同时依据电极布设方式设计了d31,d33型两种压电沥青混凝土发电路面结构,通过对比分析绝缘处理、压电材料纤维化、极化处理3种处置措施下的电能输出效果,确定了压电材料与路面材料一体化发电路面较为合理的处置方法。结果表明:压电材料在沥青混凝土中可较好发挥压电性能,且压电发电沥青混凝土的路用性能满足规范要求;d31,d33型两种发电路面结构可较好实现路面电能收集;3种处置方式下的电能输出效果逐步提高,绝缘处理可较大程度减小感应电场影响,极化处理可有效改善输出状况,二者的综合作用对压电发电沥青混凝土压电性能的表征具有重要作用,可作为压电发电沥青混凝土电能测试的关键处置措施;最后提出未来压电发电沥青混凝土电能输出研究改进建议。 | 王朝辉 王海梁 李彦伟 刘志胜 封栋杰 | 2016 | 公路交通科技2016，33，11： | 5 |
| 3 | Design,modeling and experimental investigation of a magnetically modulated rotational energy harvester for low frequency and irregular vibration显示文摘Vibration energy harvesting is a promising approach for sustainable energy generation from ambience to meet the development of self-powered systems.Here,we propose a novel compact non-resonant magnetically modulated rotational energy harvester(MMR-EH)for low frequency and irregular vibration.Through the rational arrangement of multiple magnetic fields in space,a ring route with low potential energy is established.A movable magnet can be non-contact modulated by the magnetic force to move along the ring route under irregular vibration,which is instrumental in electromechanical energy conversion.A dynamic model of the MMR-EH is developed based on the energy method and verified experimentally.The effects of key parameters on the magnetically modulated route are analysed.The simulation and experimental results demonstrate that the MMR-EH can effectively harvest the energy from ultra-low frequency(3 Hz)and irregular vibration.At a reciprocating vibration frequency of 10 Hz and an amplitude of 20 mm,the harvester can produce an average power of 0.29 mW. | ZHAO LinChuan ZOU HongXiang GAO QiuHua YAN Ge WU ZhiYuan LIU FengRui WEI KeXiang YANG Bin ZHANG WenMing | 2020 | Science China(Technological Sciences)2020，63，10： | 5 |
| 4 | 微型压电及磁电式能量采集器的研究进展显示文摘无线传感器网络是二十一世纪影响人们生活的关键技术之一,具有广阔的应用前景,而微型能量采集器因最有可能代替传统电池为其节点供电,已成为国内外的研究热点。重点介绍了国内外压电式及磁电式微型能量采集器的研究进展;分析了其结构设计、器件性能,包括器件固有频率、输出电压以及输出功率等关键性参数,总结了其能量收集模块与能量储存模块的优缺点,对未来研究工作所面临的挑战及发展趋势进行了讨论。 | 罗元 万沙浪 | 2016 | 重庆邮电大学学报(自然科学版)2016，28，1： | 5 |
| 5 | Mechanics of flexible and stretchable piezoelectrics for energy harvesting显示文摘As rapid development in wearable/implantable electronic devices benefit human life in daily health monitoring and disease treatment medically, all kinds of flexible and/or stretchable electronic devices are booming, together with which is the demanding of energy supply with similar mechanical property. Due to its ability in converting mechanical energy lying in human body into electric energy, energy harvesters based on piezoelectric materials are promising for applications in wearable/implantable device's energy supply in a renewable, clean and life-long way. Here the mechanics of traditional piezoelectrics in energy harvesting is reviewed, including why piezoelectricity is the choice for minor energy harvesting to power the implantable/wearable electronics and how. Different kinds of up to date flexible piezoelectric devices for energy harvesting are introduced, such as nanogenerators based on Zn O and thin and conformal energy harvester based on PZT. A detailed theoretical model of the flexible thin film energy harvester based on PZT nanoribbons is summarized, together with the in vivo demonstration of energy harvesting by integrating it with swine heart. Then the initial researches on stretchable energy harvesters based on piezoelectric material in wavy or serpentine configuration are introduced as well. | CHEN Ying LU BingWei OU DaPeng FENG Xue | 2015 | Science China(Physics,Mechanics & Astronomy)2015，58，9： | 5 |
| 6 | 低频振动能量收集技术研究进展显示文摘振动能量收集技术能够将环境中广泛存在的低频振动能转化为电能,促进无线传感网络技术发展与应用。文中介绍了低频振动能量收集技术的国内外研究现状,详细介绍了磁力调节法、结构拓展法与非共振法等的低频振动能量收集方法的实现途径,并归纳了用于提升能量收集效率的频带拓宽法。分析了低频振动能量收集器存在的问题,并对低频振动能量收集器的发展趋势进行了展望。 | 张坤 赵毫杰 冯伟 武照云 常永 刘宗尧 刘保国 | 2022 | 仪表技术与传感器2022，，8： | 3 |
| 7 | A cubic triboelectric generator as a self-powered orientation sensor显示文摘Recently, triboelectric generator(TEG) has attracted a lot of attention due to its high output voltage and low-cost fabrication process. Here, a novel cubic TEG box is designed, which has separated electrodes on different surfaces. Thanks to the specially designed structure, it can scavenge vibration energy from all directions. Firstly the device is investigated through finite element method(FEM) simulation. Then the device is evaluated by experiments. The measuremental results show that this device can generate an amount of 25 n C charge during once shake by charging a 10 n F capacitor. Besides, an output voltage about 100 V is obtained, which is able to directly light up several light-emitting diodes(LEDs) simultaneously. At last, the device is utilized as a self-powered orientation sensor, which shows explicit directivity. This work extends the applications of TEG for ambient vibration energy harvesting techniques and the self-powered orientation sensor. | QIU GuoLin LIU Wen HAN MengDi CHENG XiaoLiang MENG Bo SMITHA Ankanahalli Shankaregowda ZHAO JiangMing ZHANG HaiXia | 2015 | Science China(Technological Sciences)2015，58，5： | 2 |
| 8 | 一种基于MEMS的新型镂空压电悬臂梁能量采集器显示文摘在经典的矩形悬臂梁结构基础上进行改进,设计了一种新型的基板与压电膜镂空的微悬臂梁能量采集器。在悬臂梁基板与压电膜上添加镂空,分析其结构尺寸(即镂空的长度、宽度、厚度以及数量)与压电振子固有频率和开路输出电压之间的关系,并通过调节其结构尺寸,使压电能量采集器具有更低的振动频率与更高的开路输出电压。实验结果表明,在镂空长度为200μm,宽度为165μm,数量为12时,该结构振子的固有频率可达到399.7Hz,开路输出电压可达0.271V。 | 罗元 万沙浪 甘如饴 王兴龙 | 2016 | 微电子学2016，46，3： | 1 |
| 9 | 基于卡门涡街的水下振动能量采集器的设计与研究(英文)显示文摘针对传统的单自由度压电能量采集器工作带宽窄的现状,提出了在水下流激振动环境下的一种基于卡门涡街的二自由度宽频压电能量采集器来提高压电能量采集器的带宽。3种二自由度压电能量采集器分别被设计、制造,并且测试了能量采集性能。结果表明,采用二自由度能量采集器比采用传统的单自由度能量采集器具有更好的采集效率。根据仿真和实验结果,H型压电能量采集器具有更好的振动能量采集效率。 | 王海 金标 姚刚 杨春来 郑衍畅 文莉 | 2019 | 传感技术学报2019，32，3： | 1 |
| 10 | Commentary on the special topic: nanoenergy and nanosystem显示文摘In the internationally renowned journal—Science China Technological Sciences—a good selection of articles dedicated to the field of micro-/nanotechnologies have reported several advanced technologies in nanoenergy and nanosystems.Five papers written with great care by international experts are targeting to address technical challenges in self-powered chaotic signal generators | Lijie Li | 2015 | Science Bulletin2015，60，18： | 0 |
| 11 | 低频不规则振动能量采集的磁调制轨道设计、动力学建模与实验研究显示文摘无线传感器网络的迅速发展,改变人们生活的方方面面[1].传统上,这些小型化、低功耗电子器件的供能依赖于化学电池.然而,化学电池需要定期更换,并且电池材料对自然环境有一定的危害[2].振动能量广泛存在于环境中,将环境中被耗散的振动能量转换为电能,为微小电子器件供电,实现自供能传感系统,成为国际研究的热点问题.然而,环境中的振动大部分是低频、不规则的,不利于机电能量转换. | 赵林川 邹鸿翔 高秋华 颜格 吴志渊 刘丰瑞 魏克湘 杨斌 张文明 | 2020 | 中国科学:技术科学2020，50，12： | 0 |
| 12 | 三稳态压电-电磁复合能量采集器性能研究显示文摘为了提高双稳态压电电磁复合能量采集器(BPEEH)的能量转换性能和转换效率,该文在典型BPEEH的基础上,提出了一种新颖的三稳态压电电磁复合能量采集器(TPEEH)。与传统的BPEEH相比,其兼有一个新颖的电磁发电装置,进一步构成三稳态系统。该文通过对TPEEH结构装置建立数学模型,进行了数值分析,并得到该采集器系统的势能变化函数。在此基础上,通过实验验证了外界激励频率、磁铁间距及电路负载电阻对该采集器输出电压和功率的影响。实验结果表明,当磁距为16 mm,外部磁间距为26 mm,外部激励频率为10.2 Hz时,TPEEH采集器有最大的输出电压(为6.3489 V),同时在外部负载电阻为500Ω时,采集器获得最大输出功率(为0.08 W)。与传统的BPEEH采集器相比,TPEEH采集器的采集谐振频率低,采集频带宽,输出电压和功率高,从而提高了能量转换性能和效率。 | 彭召洋 宋芳 熊玉仲 | 2023 | 压电与声光2023，45，6： | 0 |
| 13 | 悬臂梁压电俘能器结构设计与电学性能有限元分析显示文摘为探明压电俘能器结构参数和不同压电材料对其电学输出性能的影响,基于压电效应,运用有限元仿真分析方法,采用COMSOL Multiphysics软件中的结构力学模块和AC/DC模块,建立悬臂梁压电俘能器初始结构模型,并对使用不同压电材料的俘能器进行电学输出性能分析。研究结果表明:根据汽车在路面行驶的速度,得出路面振动频率为6.67~13.33 Hz,不超过20 Hz。路面振动频率为0~18 Hz时使用PZT-5H的俘能器电学输出性能较高,路面振动频率为19~20 Hz时使用PZT-5A的俘能器电学输出性能较好,根据路面实际振动频率范围建议选用PZT-5H;根据电学性能输出效果,对初始俘能器进行结构优化,得到优化后的结构参数[支撑结构尺寸(长×宽×高)为(1×20×1)mm^(3)、压电材料尺寸为(30×20×0.06)mm^(3)、金属基板尺寸为(30×20×0.1)mm^(3)、质量块尺寸为(4×20×1)mm^(3)];振动频率为10 Hz、振动加速度为1g条件下,计算得到悬臂梁压电俘能器的最佳外接负载为35 kΩ,对应的输出电压为0.30 V、输出功率为1.24×10^(-6)W,相对于优化前的俘能器输出电压(0.19 V)和输出功率(0.22×10^(-6)W)分别提升了58%和463%;对悬臂梁压电俘能器进行特征频率分析,计算得到其1阶特征频率为76.9 Hz;而悬臂梁压电俘能器在频率为0~20 Hz工作时,输出电压和输出功率均随着路面振动频率增加而增加;此时路面振动频率远离1阶特征频率,不会对使用寿命产生影响,证明所设计的俘能器模型在路面振动频率范围内使用是合理的。 | 李辉 许龙舟 毛鹏 谢正阳 赵信博 王振军 | 2023 | 长安大学学报(自然科学版)2023，43，6： | 0 |
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