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High-voltage output triboelectric nanogenerator with DC/AC optimal combination method

Nano Research 2022年第4期15卷 3239-3245页

作者： Yuqi Wang Tian Huang Qi Gao Jianping Li jianming wen Zhong Lin Wang Tinghai Cheng Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Mechatronic Engineering Changchun University of TechnologyChangchun 130012China The Institute of Precision Machinery and Smart Structure Key Laboratory of Intelligent Operation and Maintenance Technology&Equipment for Urban Rail Transit of Zhejiang ProvinceCollege of EngineeringZhejiang Normal UniversityJinhua 321004China CUSTech Institute of Technology Wenzhou 325024China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332-0245USA

The high-voltage power source is one of the important research directions of triboelectric nanogenerator(TENG).In this paper,a high-voltage output TENG(HVO-TENG)is proposed with direct current/alternating current(DC/AC)optimal combination method for wind energy harvesting.Through the optimal design of a direct current generation unit(DCGU)and an alternating current generation unit(ACGU),the HVO-TENG can produce DC voltage of 21.5 kV and AC voltage of 200 V,simultaneously.The HVOTENG can continuously illuminate more than 6,000 light emitting diodes(LEDs),which is enough to drive more possible applications of TENG.Besides,this paper explored application experiments on HVO-TENG.Demonstrative experiments indicate that the high-voltage DC output is used for producing ozone,while the AC output can light up ultraviolet(UV)LEDs.The HVOTENG can increase the ozone concentration(C)in an airtight container to 3 parts per million(ppm)after 7 h and continuously light up UV LEDs.All these demonstrations verify that the HVO-TENG has important guiding significance for designing high performance TENG.

关键词： triboelectric nanogenerator high voltage direct current/alternating current(DC/AC)optimal combination wind energy harvesting

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Enhanced performance of triboelectric mechanical motion sensor via continuous charge supplement and adaptive signal processing

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Nano Research 2023年第7期16卷 10263-10271页

作者： Zitang Yuan Xiaosong Zhang Hengyu Li Ping Shen jianming wen Zhong Lin Wang Tinghai Cheng Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China The Institute of Precision Machinery and Smart Structure Zhejiang Normal UniversityJinhua 321004China State Key Laboratory of Internet of Things for Smart City and Department of Civil and Environmental Engineering University of MacaoMacao 999078China Georgia Institute of Technology AtlantaGA 30332-0245USA

The development of automation industry is inseparable from the progress of sensing technology.As a promising self-powered sensing technology,the durability and stability of triboelectric sensor(TES)have always been inevitable challenges.Herein,a continuous charge supplement(CCS)strategy and an adaptive signal processing(ASP)method are proposed to improve the lifetime and robustness of TES.The CCS uses low friction brushes to increase the surface charge density of the dielectric,ensuring the reliability of sensing.A triboelectric mechanical motion sensor(TMMS)with CCS is designed,and its electrical signal is hardly attenuated after 1.5 million cycles after reasonable parameter optimization,which is unprecedented in linear TESs.After that,the dynamic characteristics of the CCS-TMMS are analyzed with error rates of less than 1%and 2%for displacement and velocity,respectively,and a signal-to-noise ratio of more than 35 dB.Also,the ASP used a signal conditioning circuit for impedance matching and analog-to-digital conversion to achieve a stable output of digital signals,while the integrated design and manufacture of each hardware module is achieved.Finally,an intelligent logistics transmission system(ILTS)capable of wirelessly monitoring multiple motion parameters is developed.This work is expected to contribute to automation industries such as smart factories and unmanned warehousing.

关键词： triboelectric mechanical motion sensor continuous charge supplement adaptive signal processing durability and stability multiple motion parameters monitoring

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A drawstring triboelectric nanogenerator with modular electrodes for harvesting wave energy

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Nano Research 2023年第8期16卷 10931-10937页

作者： Da Zhao Hengyu Li Jianlong Wang Qi Gao Yang Yu jianming wen Zhong Lin Wang Tinghai Cheng School of Mechatronic Engineering Changchun University of TechnologyChangchun 130012China Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 100049China College of Engineering Zhejiang Normal UniversityJinhua 321004China Georgia Institute of Technology AtlantaGA 30332-0245USA

The development and utilization of marine blue energy has become the focus of current research.A drawstring triboelectric nanogenerator with modular electrodes(DS-TENG)is proposed to harvest wave energy.Motion displacement and water wave adaptability are improved by using the drawstring structure in the DS-TENG.Furthermore,the modular electrode design is applied to improve the durability and replaceability of the generation units.The rationality of the structure is verified by theoretical analysis,and performance experiments on the fundamental output,displacement and frequency,durability and application are carried out.The DS-TENG can achieve output performance of 98.03 nC,3.63μA,238.50 V and 923.92µW at 150 mm and 1.0 Hz.In addition,the performance drops by 6.11%after 110,000 cycles for DS-TENG durability.This paper will provide reference for the design of TENG that adapts to a wide range of wave heights.

关键词： triboelectric nanogenerator wave energy harvesting drawstring modular electrodes motion displacement

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A Novel Bionic Piezoelectric Actuator Based on the Walrus Motion

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Journal of Bionic Engineering 2021年第5期18卷 1117-1125页

作者： Jianping Li Junjie Cai Nen Wan Yili Hu jianming wen Junwu Kan Song Chen Hongwei Zhao Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology and Equipment of Zhejiang Provincial The Institute of Precision Machinery and Smart StructureCollege of EngineeringZhejiang Normal UniversityJinhua 321004China School of Mechanical and Aerospace Engineering Jilin UniversityChangchun 130025China

A novel bionic piezoelectric actuator based on the walrus motion to achieve high performance on large working stroke for micro/nano positioning systems is first proposed in this study.The structure of the proposed walrus type piezoelectric actuator is described,and its motion principle is presented in details.An experimental system is set up to verify its feasibility and explore its working performances.Experimental results indicate that the proposed walrus type piezoelectric actuator could realize large working stroke with only one driving unit and one coupled clamping unit;the maximum stepping displacement isΔL max=19.5μm in the case that the frequency f=1 Hz and the voltage U=120 V;the maximum speed V max=2275.2μm·s^(-1) when the frequency f=900 Hz and the voltage U=120 V;the maximum vertical load m max=350 g while the voltage U=120 V and the frequency f=1 Hz.This study shows the feasibility of mimicking the bionic motion of the real walrus animal to the design of piezoelectric actuators,which is hopeful for the real application of micro/nano positioning systems to achieve large working stroke and high performance.

关键词： Piezoelectric actuator Bionic actuator Walrus motion Flexure mechanism

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基于Hadamard product优化多层神经网络的胸部电阻抗成像研究

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生物医学工程学杂志 2024年第3期41卷 439-446,454页

作者：宋振忠李建平温建明万嫩马继杰张昱胡意立高增锋浙江师范大学工学院浙江省城市轨道交通智能运维技术与装备重点实验室精密机械与智能结构研究所浙江金华321004 千叶大学融合理工学府日本千叶263-8522

电阻抗成像(EIT)是一种无辐射、非侵入式的可视化诊断技术。为提高胸部电阻抗成像技术重建算法的成像分辨率和去伪影能力,本研究提出了一种利用Hadamard product优化多层神经网络(MANN)的HMANN算法。将HMANN算法的重建图像与广义矢量模... 详细信息

电阻抗成像(EIT)是一种无辐射、非侵入式的可视化诊断技术。为提高胸部电阻抗成像技术重建算法的成像分辨率和去伪影能力,本研究提出了一种利用Hadamard product优化多层神经网络(MANN)的HMANN算法。将HMANN算法的重建图像与广义矢量模式匹配(GVSPM)算法、截断奇异值分解(TSVD)算法、反向传播(BP)神经网络算法和传统MANN算法的重建图像进行对比,仿真结果表明:相对于MANN算法,HMANN算法重建图像的相关系数在圆截面模型中可以提高17.30%,在肺截面模型中可以提高13.98%。虽然肺截面模型中HMANN算法重建图像的部分相关系数会有所下降,但在所有模型中,HMANN算法保留了MANN算法的图像信息,同时HMANN算法重建图像的伪影更少,检测目标与背景的可识别度比传统MANN算法高。本研究可以提升重建图像的相关系数,有效去除重建图像的伪影,为EIT成像技术提供了一种有效提升重建图像质量的新思路。

关键词：电阻抗成像多层神经网络 Hadamardproduct 伪影

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A non-smooth model of gear vibration

A non-smooth model of gear vibration

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23rd International Congress of Theoretical and Applied Mechanics

作者： jianming wen Xiangrong Zhou Yiqiang Sun School of Aerospace Engineering and Applied Mechanics Tongji University Shanghai Marine Equipment Research Institute

＜正＞Gear transmission is extensively used in all kinds of mechanical system because of its high efficiency and reliability.In fact,the transmission produces noise and vibration.In this paper,marine gear rubber coupling was as the engineering background.The rubber sheet was put in the gear teeth on both sides of the exper-

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Weak measurement correlation spectroscopy for magnetic field sensing

Weak measurement correlation spectroscopy for magnetic field...

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第十八届全国量子光学学术会议

作者： Weizhi Qu Jian Sun 金沈超 Eugeniy Mikhailov Liang Jiang jianming wen Yanhong Xiao Department of Physics State Key Laboratory of Surface Physicsand Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education)Fudan University 复旦大学 Department of Physics College of William and Mary Department of Applied Physics Yale University Department of Physics Kennesaw state University Collaborative Innovation Center of Advanced Microstructures

Weak measurement(WM) can amplify an otherwise invisible small signal and holds great potential for precision measurements [1, 2]. We propose a weak measurement resonance spectroscopy method to achieve narrow linewidth near 0.1 Hz. By tuning the overlap between the output optical state and the nearly perpendicular input state, the resonance linewidth, as well as the signal to noise can be optimized. Utilizing this narrow resonance, we experimentally demonstrated a magnetic field sensitivity of 13 fT/Hz(near DC), in a room-temperature Rb vapor cell and using only one laser beam with power as low as 11 μW. Our results extend the theoretical framework of weak measurement to classical regime(frequency post-selection), and provides new insights in precision measurement techniques.

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工科特色理论力学课程育人的三维融合模式建设

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力学季刊 2022年第1期43卷 190-195页

作者：汤可可王华宁温建明同济大学航空航天与力学学院上海200092

课程思政是提升工科人才培养质量,落实立德树人根本任务的重要途径.人才培养目标的高要求给工科课程思政带来较大挑战.本文以同济大学的工科人才培养为背景,探讨了具有同济标志工科特色的理论力学课程思政内容建设.课程教学中以时间尺... 详细信息

课程思政是提升工科人才培养质量,落实立德树人根本任务的重要途径.人才培养目标的高要求给工科课程思政带来较大挑战.本文以同济大学的工科人才培养为背景,探讨了具有同济标志工科特色的理论力学课程思政内容建设.课程教学中以时间尺度上经典力学的发展脉络为纵线,融合力学支撑的科学和工程前沿研究以及同济大学参与的国家重大工程等维度元素,实现理论力学课程思政的协同育人目标.

关键词：课程思政工科特色理论力学经典力学史三维融合

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E型梁结构尾涡振动式压电流体俘能器的分析与试验

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实验力学 2022年第6期37卷 911-920页

作者：胡意立葛程鹏刘景全温建明浙江师范大学浙江省城市轨道交通智能运维技术与装备重点实验室浙江金华321004 上海交通大学微米/纳米制造国家重点实验室上海200240

在真实的管道应用场景中,压电流体俘能器需具备较宽的工作频带,以便适应复杂多变的流场环境。针对该需求,本文提出了一种新型尾涡振动式压电流体俘能器。俘能器主体采用E型梁结构,该结构主要由起振板、主梁和两个副梁共同构成,通过调节... 详细信息

在真实的管道应用场景中,压电流体俘能器需具备较宽的工作频带,以便适应复杂多变的流场环境。针对该需求,本文提出了一种新型尾涡振动式压电流体俘能器。俘能器主体采用E型梁结构,该结构主要由起振板、主梁和两个副梁共同构成,通过调节起振板和副梁尾端的质量块,可使俘能器的前三阶谐振频率相互靠近从而实现俘能频带拓宽和可调。本研究采用建模仿真和试验的方法,分析所提出俘能器的振动特性、输出性能以及水下真实环境中的工作性能。研究结果表明,所提出的基于E型梁结构的尾涡振动式压电流体俘能器具备结构紧凑、空间和能量利用率高、宽频带和频带可调、可多梁同时高效工作的能力,当水的流速为0.55m/s时,俘能器的最大输出功率为115μW。相关结果可为阵列式流体俘能技术的研究和发展提供了参考。

关键词：尾涡振动压电俘能器阵列多频

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大型钢结构多机器人协同焊接控制虚拟仿真实验设计

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实验室研究与探索 2022年第2期41卷 202-207,218页

作者：兰虎温建明邵金均潘睿鄂世举浙江师范大学工学院浙江金华321004

大型钢结构多机器人协同焊接是制造业先进基础工艺的重要组成部分,对传统产业高端化、智能化、绿色化转型发展起到重要支撑作用。针对构件尺寸大、质量重,焊接高危性和系统参数调控复杂等现实条件制约,通过以研哺教、虚拟不虚,设计单—... 详细信息

大型钢结构多机器人协同焊接是制造业先进基础工艺的重要组成部分,对传统产业高端化、智能化、绿色化转型发展起到重要支撑作用。针对构件尺寸大、质量重,焊接高危性和系统参数调控复杂等现实条件制约,通过以研哺教、虚拟不虚,设计单—双—多机器人协同焊接“三层递进”模块;流程再造、仿真真仿,打造大型港口机械箱梁钢结构多机器人协同焊接孪生版;系统生成的知识短板、个性化资源,构建以学生为中心的多元评价持续学习机制。实验再现企业的生产流程、融入企业的创新要素,聚焦多机器人协同焊接运动控制、安全控制和质量控制等共性关键技术,促进高校教学、行业应用与技术创新融合发展,实现了工业机器人技术及应用传统教学的时空延伸与模式创新。

关键词：大型钢结构焊接多机器人协同控制虚拟仿真实验产教融合

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