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2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)最新文献

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Formation of a field emission array for the efficient conversion of electron energy into X-ray radiation for the maskless X-ray lithography 用于无掩模x射线光刻的电子能量有效转换为x射线辐射的场发射阵列的形成
I. D. Evsikov, G. Demin, P. Glagolev, N. Djuzhev, M. A. Makhiboroda, N. Chkhalo, N. Salashchenko, A. G. Kolos’ko, E. O. Popov
This paper discusses the technological prospects for creating a field emitter array for the efficient conversion of electron energy to X-ray radiation in a portable X-ray source. Fabrication process of a field emission array and X-ray transparent beryllium membrane is proposed. Three-dimensional model of field emission array combined with beryllium membrane was created in COMSOL Multiphysics. Dependence of X-ray conversion coefficient vs. voltage between a field-emission array and beryllium membrane was calculated and dependence of electron energy vs. electron beam radius was obtained as a result of electron transport simulation.
本文讨论了在便携式x射线源中为有效地将电子能量转换为x射线而制造场发射阵列的技术前景。提出了一种场发射阵列和x射线透明铍膜的制备工艺。在COMSOL Multiphysics中建立了场发射阵列与铍膜结合的三维模型。计算了场发射阵列与铍膜之间的x射线转换系数与电压的关系,并通过电子输运模拟得到了电子能量与电子束半径的关系。
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引用次数: 0
Design And Implementation of an Opamp Based Interface Circuit for Improving the Output Power of Frequency Up Conversion Piezoelectric Energy Harvester 基于Opamp的提高变频压电能量采集器输出功率接口电路的设计与实现
Qifan Gao, L. Bu, Sixing Xu, X. Wang
This paper proposes an interface circuit for a frequency up conversion piezoelectric energy harvester with OPAMP as core controller, which can increase output power by over 400% compared with full bridge circuit. Because of differential amplification characteristics of OPAMP, the failure of traditional logic gates zero-crossing detection circuit in low voltage is overcome. The advantage of frequency up conversion energy harvester is suitable for wide frequency bands, but output waveform is attenuating and oscillating, making circuit design difficult to detect zero-crossing point, causing low power efficiency. Innovations include: (1) Theoretical modeling method of frequency up conversion energy harvester (2) Power management circuit design method suitable for frequency up conversion energy harvester is proposed for the first time. Using OPAMP, control logic is effective in the case of harvester output attenuating and oscillating and current is low. (3) Method about how to choose device parameters.
本文提出了一种以OPAMP为核心控制器的变频压电能量采集器接口电路,其输出功率比全桥电路提高400%以上。由于OPAMP的差分放大特性,克服了传统逻辑门过零检测电路在低压下的失效。上变频能量采集器的优点是适用于较宽的频段,但输出波形有衰减和振荡,使得电路设计难以检测过零点,导致功率效率低。创新包括:(1)上变频能量采集器的理论建模方法(2)首次提出了适用于上变频能量采集器的电源管理电路设计方法。使用OPAMP,在收割机输出衰减振荡和电流较低的情况下,控制逻辑是有效的。(3)设备参数的选择方法。
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引用次数: 1
Low-Cost, Fully 3D-Printed, Magnetically Actuated, Miniature Valve-Less Liquid Pumps 低成本,完全3d打印,磁力驱动,微型无阀液体泵
Anthony P. Taylor, L. Velásquez-García
We report the design, fabrication, and characterization of the first fully 3D-printed, multi-material, magnetically driven, valve-less miniature liquid pumps in the literature. Extending our work on 3D-printed liquid pumps [1] and magnetic actuators [2], the new devices are driven by a rotating magnet and employ valve-less diffusers [3]. Our leak-tight, miniature liquid pumps are microfabricated using 150 $mu$ m layers in pure Nylon 12 and NdFeB-embedded Nylon 12 via fused filament fabrication (FFF) [4] –an inexpensive additive manufacturing method for thermoplastics capable of monolithically creating multi-material objects. The fabrication of the pumps employs a novel multi-material printing process that monolithically creates all features with <13 $mu$ m in-plane misalignment. The new pumps occupy 4.3X less volume than our FFF printed embedded magnet pumps, while sustaining 20% larger flow rates and actuating 14X faster [1].
我们在文献中报告了第一个完全3d打印,多材料,磁力驱动,无阀微型液体泵的设计,制造和表征。将我们在3d打印液体泵[1]和磁性执行器[2]上的工作扩展,新设备由旋转磁铁驱动,并采用无阀扩散器[3]。我们的密封性微型液体泵是通过熔融长丝制造(FFF)(一种廉价的热塑性塑料增材制造方法,能够单片制造多材料物体),使用150 $ $ μ $ m的纯尼龙12和ndfeb嵌入尼龙12层进行微制造的。泵的制造采用了一种新型的多材料打印工艺,整体上产生了小于13 $ $ $ m的平面内偏差的所有特征。与我们的FFF印刷嵌入式磁铁泵相比,新泵的体积减少了4.3倍,但流量增加了20%,驱动速度提高了14倍[1]。
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引用次数: 1
An Efficient Electromagnetic Wind Energy Harvester for Self-Powered Wireless Sensor Node 一种用于自供电无线传感器节点的高效电磁风能采集器
Yan Fang, Yunfei Li, Manjuan Huang, Huicong Liu, Tao Chen, Gang Tang, Lining Sun
In this paper, an efficient wind energy harvester (WEH) which simultaneously possesses both the advantages of simple structure and easy manufacture is designed. Proved by the simulation results, the WEH with air outlet at the top side not only effectively increases the rotational speed of the turbine but also obviously enhances the rotation stability of the blades, which eventually turn to improve the output performance of the device. According to experimental analysis, when the wind speed is 15 m/s, the proposed WEH can generate maximum output power of 40.7 mW, with corresponding power density of 0.3 mW/cm3. Last but not least, integrated with a switch-controlled circuit module and a low-powered angle sensor module, a self-powered wireless sensor node (WSN) is successfully established.
本文设计了一种结构简单、制造方便的高效风能采集器。仿真结果证明,顶部出气口的WEH不仅有效地提高了涡轮的转速,而且明显增强了叶片的旋转稳定性,最终提高了装置的输出性能。根据实验分析,当风速为15 m/s时,所提出的WEH最大输出功率为40.7 mW,对应的功率密度为0.3 mW/cm3。最后,结合开关控制电路模块和低功耗角度传感器模块,成功构建了自供电无线传感器节点(WSN)。
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引用次数: 4
Position Independent Wearable 6.78 MHz Near-Field Radiative Wireless Power Transfer using Electrically-Small Embroidered Textile Coils 独立于位置的可穿戴式6.78 MHz近场辐射无线电力传输,使用电小刺绣纺织线圈
M. Wagih, A. Komolafe, B. Zaghari
Coupled wireless power transfer (WPT) has been widely used for near-field high-efficiency WPT applications. However, the efficiency of the WPT link is highly sensitive to separation and alignment, and is prone to over-coupling, making it unsuitable for mobile systems with unknown or loose coupling such as wearables. While ultra-high frequency (UHF) and microwave radiative WPT (0.3-3 GHz) enables meters-long separation between the transmitter and the receiver, free space propagation losses, and rectification inefficiencies, adversely limit the end-to-end efficiency of the WPT link. This work proposes radiative WPT, in the 6.78 MHz license-free band, based on resonant electrically small antennas fabricated using embroidered textile coils, tuned using L-matching networks. The proposed WPT system achieves a stable forward transmission of $mathrm{S}_{21} gt$ – 17 dB and $mathrm{S}_{21} gt$ – 28 dB, independent of coil, separation on the XZ and XY planes respectively, in a $27 mathrm{m}^{3}$ volume space. The presented approach demonstrates the highest WPT-link efficiency, and promises higher end-to-end efficiency, compared to UHF WPT.
耦合无线功率传输(WPT)在近场高效无线功率传输中得到了广泛的应用。然而,WPT链路的效率对分离和对齐高度敏感,并且容易过度耦合,因此不适合具有未知或松散耦合的移动系统,例如可穿戴设备。虽然超高频(UHF)和微波辐射WPT (0.3-3 GHz)在发射器和接收器之间实现了数米长的距离,但自由空间传播损失和整流效率低下,限制了WPT链路的端到端效率。这项工作提出了在6.78 MHz免许可频段的辐射WPT,基于使用刺绣纺织线圈制造的谐振电小天线,使用l匹配网络进行调谐。所提出的WPT系统在$27 mathrm{m}^{3}$的体积空间内实现了$mathrm{S}_{21} gt$ - 17 dB和$mathrm{S}_{21} gt$ - 28 dB的稳定前向传输,分别与XZ和XY平面上的线圈分离无关。与UHF WPT相比,该方法展示了最高的WPT链路效率,并承诺更高的端到端效率。
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引用次数: 2
Multi-Functional Human-Machine Interface (HMI) Using Flexible Wearable Triboelectric Nanogenerator for Diversified Interacting Applications 基于柔性可穿戴摩擦电纳米发电机的多功能人机界面(HMI
Qiongfeng Shi, Zixuan Zhang, Chengkuo Lee
A triboelectric interacting patch with only four sensing electrodes is presented as flexible and multifunctional human-machine interface for the detection of various human-machine interactions. By leveraging the predefined operation areas, position detection under finger operations can be achieved through the output relationship of the four electrodes. The accurate sensing capability of the triboelectric patch is compatible with common finger motions such as finger tapping and sliding, opening up broad application in various interacting areas, e.g., writing interface, security code system, intuitive intelligent control, virtual/augmented reality, and robotics, etc.
提出了一种仅包含四个传感电极的摩擦电交互贴片作为灵活的多功能人机界面,用于检测各种人机交互。利用预定义的操作区域,通过四个电极的输出关系实现手指操作下的位置检测。该摩擦电贴片具有准确的传感能力,兼容手指轻敲、滑动等常见的手指动作,在编写界面、安全编码系统、直观智能控制、虚拟/增强现实、机器人等各种交互领域具有广阔的应用前景。
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引用次数: 1
PDMS-ZNO Composite Textile Ferroelectret For Human Body Energy Harvesting 用于人体能量收集的PDMS-ZNO复合纺织铁驻极体
J. Shi, S. Beeby
This research presents a flexible, low cost ferroelectret integrated into a piece of ordinary textile. The textile ferroelectret is made of PDMS (polydimethylsiloxane)-ZnO (Zinc oxide) nanoparticle mixture that spin cast on both side of a textile. The PDMS-ZnO textile ferroelectret achieved 55% piezoelectric coefficient d33 remaining, compared with 35% of pure PDMS textile ferroelectret. The measured piezoelectric coefficient d33 of the PDMS-ZnO textile ferroelectret is maintained at 220 pC/N after two weeks.
本研究提出了一种柔性的、低成本的铁驻极体集成到一块普通纺织品中。纺织铁驻极体是由PDMS(聚二甲基硅氧烷)-ZnO(氧化锌)纳米颗粒混合物制成的,该混合物在纺织品的两侧旋转铸造。PDMS- zno纺织铁驻极体的压电系数为55%,而纯PDMS纺织铁驻极体的压电系数为35%。两周后,PDMS-ZnO纺织铁驻极体的压电系数d33保持在220 pC/N。
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引用次数: 2
Low-Cost, Rugged Microfluidics via Silver Clay Extrusion 低成本,坚固的微流体通过银粘土挤压
E. Segura-Cárdenas, L. Velásquez-García
We report novel, low-cost, high-temperature compatible, high-pressure compatible, and chemically resistant 3D printed microfluidics suitable for microreactors, heat exchangers, and other PowerMEMS applications. The devices are manufactured via silver clay extrusion; optimization of the printing method results in linearity between printed and computer-aided design (CAD) features, with ~11% (printed positive features, i.e. solid) and ~12% (printed negative features, i.e. voids) shrinking from CAD values after firing. Printed gaps as narrow as 200 μm were demonstrated, which are adequate to implement closed-channel microfluidics. A proof-of-concept microreactor that decomposes hydrogen peroxide was designed, fabricated, and characterized, demonstrating 86% efficiency with initial 30% hydrogen peroxide (w/w) in water concentration.
我们报告了新颖,低成本,高温兼容,高压兼容,耐化学腐蚀的3D打印微流体,适用于微反应器,热交换器和其他PowerMEMS应用。该装置是通过银粘土挤压制造的;打印方法的优化导致打印和计算机辅助设计(CAD)特征之间的线性关系,在烧制后,与CAD值相比,打印的正片特征(即固体)和打印的负片特征(即空隙)分别缩小了11%和12%。结果表明,打印间隙窄至200 μm,足以实现封闭通道微流体。设计、制造并表征了一个概念验证型微反应器,该反应器分解过氧化氢的效率为86%,初始过氧化氢(w/w)浓度为30%。
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引用次数: 0
Lab-on-chip platform as a nanosatellite payload solution for biomedical experiments in outer space 芯片实验室平台作为外层空间生物医学实验的纳米卫星有效载荷解决方案
A. Podwin, A. Graja, Dawid Przystupski, D. Lizanets, P. Śniadek, R. Walczak, J. Dziuban
Growing interest in outer space exploration with the use of small scale (1-10 kg), so called, CubeSat nanosatellites can be recently observed. Special attention is paid here mainly to the investigation of widely understandable life development in diverse and harsh space environments [1] –[3]. Application of a miniature lab-on-chip (LOC) instrumentation in this regard appears to be reasonable solution to conduct different and relatively inexpensive biomedical tests in microgravity. As a response, this work presents a multi-functional and full-featured LOC platform ready for the integration with the dedicated nanosatellite system.
最近可以观察到,人们对利用小型(1-10公斤)所谓立方体纳米卫星进行外层空间探索的兴趣日益浓厚。这里特别关注的是在多样和恶劣的空间环境中广泛理解的生命发展[1]-[3]。在这方面,应用微型芯片实验室(LOC)仪器似乎是在微重力下进行不同且相对廉价的生物医学试验的合理解决方案。作为回应,这项工作提出了一个多功能和全功能的LOC平台,准备与专用纳米卫星系统集成。
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引用次数: 3
CuAg electrode for creatinine microfluidic fuel cell based self-powered electrochemical sensor. CuAg电极用于肌酐微流体燃料电池自供电电化学传感器。
M. García-Barajas, A. M. Trejo-Dominguez, J. Ledesma-García, L. Arriaga, L. Á. Contreras, J. Galindo-de-la-Rosa, N. Arjona, M. Guerra‒Balcázar
Fuel cell-based self-powered electrochemical sensors have attracted considerable attention because contrary to conventional electrochemical sensors, they do not need external power supplies and complex devices due to they operate through the use of electrical output as sensing signal provided by redox reactions in fuel cells. Creatinine has been considered as an indicator of renal function specifically after dialysis, thyroid malfunction and muscle damage. The development of a suitable catalytic material for creatinine sensing able to generate electrical energy from its oxidation is still a challenge. Creatinine can form complexes with different transition metals due to the number of binding sites that coordinate with the metal donor groups such as copper. However, Cu suffers fast oxidation under environmental conditions and thus, the development of Cu alloys is needed. In this work, we developed an electrode with a catalytic ink containing a CuAg bimetallic material as an electrocatalyst for creatinine oxidation. The electrode was evaluated in a fuel cell and creatinine sensing.
基于燃料电池的自供电电化学传感器与传统的电化学传感器不同,不需要外部电源和复杂的器件,其工作原理是利用燃料电池中氧化还原反应提供的电输出作为传感信号。肌酐被认为是透析、甲状腺功能障碍和肌肉损伤后肾功能的指标。开发一种适合肌酐感应的催化材料,使其能够从其氧化中产生电能,仍然是一个挑战。肌酐可以与不同的过渡金属形成配合物,这是由于与铜等金属供体基配合的结合位点的数量。然而,铜在环境条件下氧化快,因此需要开发铜合金。在这项工作中,我们开发了一种含有CuAg双金属材料的催化油墨电极,作为肌酸酐氧化的电催化剂。该电极在燃料电池和肌酐传感中进行了评估。
{"title":"CuAg electrode for creatinine microfluidic fuel cell based self-powered electrochemical sensor.","authors":"M. García-Barajas, A. M. Trejo-Dominguez, J. Ledesma-García, L. Arriaga, L. Á. Contreras, J. Galindo-de-la-Rosa, N. Arjona, M. Guerra‒Balcázar","doi":"10.1109/PowerMEMS49317.2019.61547401764","DOIUrl":"https://doi.org/10.1109/PowerMEMS49317.2019.61547401764","url":null,"abstract":"Fuel cell-based self-powered electrochemical sensors have attracted considerable attention because contrary to conventional electrochemical sensors, they do not need external power supplies and complex devices due to they operate through the use of electrical output as sensing signal provided by redox reactions in fuel cells. Creatinine has been considered as an indicator of renal function specifically after dialysis, thyroid malfunction and muscle damage. The development of a suitable catalytic material for creatinine sensing able to generate electrical energy from its oxidation is still a challenge. Creatinine can form complexes with different transition metals due to the number of binding sites that coordinate with the metal donor groups such as copper. However, Cu suffers fast oxidation under environmental conditions and thus, the development of Cu alloys is needed. In this work, we developed an electrode with a catalytic ink containing a CuAg bimetallic material as an electrocatalyst for creatinine oxidation. The electrode was evaluated in a fuel cell and creatinine sensing.","PeriodicalId":6648,"journal":{"name":"2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)","volume":"116 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77977608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS)
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