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IEEE International Conference on Industrial technology (ICIT)

作者： Qi Wu Binbin Mou Zhijian Li Wen-An Zhang Yao-Wei Wang Zhenbin Wang College of Information Engineering Zhejiang University of Technology Hangzhou China Department of Automation Zhejiang University of Technology Zhejiang Provincial United Key Laboratory of Embedded Systems Hangzhou China College of Information Science and Engineering Wuhan University of Science and Technology Wuhan China School of Information Science and Engineering Wuhan University of Science and Technology Wuhan China Engineering Research Center of Metallurgical Automation and Measurement Technology Wuhan University of Science and Technology Wuhan China

ISBN: (数字)9798331521950

ISBN: (纸本)9798331521967

Rotating machinery is critical in industries such as wind power, aerospace, and manufacturing. These machines often operate under high loads and intense conditions, leading to frequent failures in critical components like bearings and gears. Such failures can result in significant economic losses and safety concerns. Fault diagnosis technology, which uses operational data to analyze and identify fault types, is essential for maintaining reliable operation. Traditional vibration signal analysis is effective but costly and invasive, while acoustic analysis is non-invasive and cost-effective but vulnerable to environmental noise. In contrast, three-phase current signals, measured using current transformers, offer a low-cost, minimally invasive alternative with excellent noise resistance. This paper proposes a method for fault diagnosis using three-phase current signals. The method employs Butterworth filtering to improve the signal-to-noise ratio, followed by advanced data analysis techniques such as multi-scale feature extraction and a multi-channel attention mechanism to realized fault diagnosis of rotating machinery. Experimental results demonstrate the effectiveness of this approach in achieving accurate fault detection, with a diagnostic accuracy of 96.11%. The proposed method shows robust diagnostic capabilities across various operating conditions.

关键词： Fault diagnosis Vibrations Attention mechanisms Accuracy Filtering Working environment noise Wind power generation Feature extraction Machinery Signal to noise ratio

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A Novel Skin Model of Electrospun Membranes For Evaluation of Microneedles Insertion Performance

SSRN

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SSRN 2024年

作者： Zhang, Li Fu, Hongyang Su, Rui Li, Zhipeng Wang, Yuan Zhang, Yilong Ma, Fengsen Laboratory of Biologics and Biomaterials College of Pharmacy Zhejiang University of Technology Deqing313216 China Department of Dermatology The First Affiliated Hospital of Zhejiang Chinese Medical University Hangzhou310006 China College of Computer Science and Technology Zhejiang University of Technology Hangzhou310023 China Co. Ltd. Hangzhou310012 China Micro-nano Scale Biomedical Engineering Laboratory Institute for Frontiers and Interdisciplinary Sciences Zhejiang University of Technology Hangzhou310014 China Zhejiang Provincial Key Laboratory of Quantum Precision Measurement Hangzhou310023 China

The preparation of nanofiber materials by electrospinning and the fabrication of microneedle arrays patch for medical and cosmetic purposes using polymer materials are hotspots of basic and applied research in materials science in recent decades, showing a bright future. However, the mechanical strength of polymer microneedles is relatively weak, and the performance of piercing the skin determines their effectiveness and reliability. A more accurate, suitable, rapid and simple in vitro evaluation method is much needed for the development and pre-marketing quality assurance of such products. We used electrospinning to form nanofiber membranes mimicking the elastic fiber structure of the epidermis and dermis to prepare a novel multilayered skin model, and investigated its feasibility and applicability for microneedles insertion performance evaluation. © 2024, The Authors. All rights reserved.

关键词： Electrospinning

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Thermal and Magnetic Field Analysis of Temperature Control Module for Vcsel Chips

SSRN

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SSRN 2023年

作者： Li, Dezhao Cheng, Chuanguang Ruan, Yangtao Wang, Zixuan Lin, Qiang Li, Long Zhejiang Provincial Key Laboratory of Quantum Precision Measurement College of Science Zhejiang University of Technology Hangzhou310023 China Research Center for Quantum Sensing Research Institute of Intelligent Sensing Zhejiang Lab Zhejiang Hangzhou311100 China Department of Aeronautics and Astronautics Fudan University Shanghai200433 China

VCSEL chips with wavelengths in the range of 700nm~800nm, the same as the transition spectral lines of alkali atoms, can be used as light sources for novel miniaturized quantum sensors. The conventional temperature control module for VCSEL is based on a thermoelectric cooler (TEC) and temperature sensor. However, the package size is large, and the magnetic field noise is both too large for real applications. In this study, we proposed a chip-scale packaging method with an overall dimension of 6*4mm for VCSEL with 795nm output wavelength. With temperature uniformity and the magnetic field distribution profiles of the package, chips have been carefully evaluated. The generated magnetic field can decay to less than 100nT within 3mm. In all, we not only experimentally demonstrated an applicable thermal package structure, but also gave the magnitude and distance effects of the magnetic field caused by this structure. This study can provide an example and reference for the chip-scale temperature control packaging method of VCSELs and their application in quantum sensors. © 2023, The Authors. All rights reserved.

关键词： Finite element method

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Biomass Ppower generation: A pathway to carbon neutrality

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Science of the Total Environment 2024年 933卷

作者： Du, Wei Cui, Zhanpeng Wang, Jinze Qin, Yiming Ye, Jianhuai Lin, Nan Chen, Yuanchen Duan, Wenyan Chang, Zhaofeng Li, Hao Zhang, Peng Pan, Bo Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control Faculty of Environmental Science & Engineering Kunming University of Science & Technology Kunming650500 China Key Laboratory for Earth Surface Processes College of Urban and Environmental Sciences Peking University Beijing100871 China School of Energy and Environment City University of Hong Kong SAR 999077 Hong Kong Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks School of Environmental Science and Engineering Southern University of Science and Technology Guangdong Shenzhen China Department of Environmental Health School of Public Health Shanghai Jiao Tong University Shanghai200025 China Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province College of Environment Zhejiang University of Technology Zhejiang Hangzhou310032 China

In light of the pressing need to reduce carbon emissions, the biomass power generation industry has gained significant attention and has increasingly become a crucial focus in China. However, there are still considerable gaps in the historical background, status, and prospects of biomass power generation. Herein, the historical and current status of biomass power generation in China are systematically reviewed, with a particular emphasis on supportive policies, environmental impacts, and future projections. By 2022, the newly installed capacity for biomass power generation reached 3.34 MW with a total installed capacity of 41 MW. The power produced from biomass power generation is 182.4 billion kWh in China. The total installed capacity and generated power in 2022 were 1652 and 1139 folds higher than in 2006 when the first biomass generation plant was established. However, disparities in the distribution of biomass resources and power generation were observed. key drivers of the industry development include tax, finance, and subsidy policies. Under the implementation of the 14th Five-Year Plan for renewable energy development and the goal of carbon neutrality, biomass power generation may achieve great success through more targeted policy support and advanced technologies that reduce air pollutant emissions. If combined with Bioenergy with Carbon Capture and Storage (BECCS) technology, biomass power generation will make its contribution to carbon neutrality in China. © 2024 Elsevier B.V.

关键词： Greenhouse gases

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Non-Invasive measurement and Multi-Channel Attention Network for Fault Diagnosis of Rotating Machinery Under Variable Operating Conditions 26

Non-Invasive Measurement and Multi-Channel Attention Network...

引用

26th International Conference on Industrial technology, ICIT 2025

作者： Wu, Qi Mou, Binbin Li, Zhijian Zhang, Wen-An Wang, Yao-Wei Wang, Zhenbin College of Information Engineering Zhejiang University of Technology Hangzhou China Department of Automation Zhejiang University of Technology Hangzhou310023 China Zhejiang Provincial United Key Laboratory of Embedded Systems Hangzhou310023 China College of Information Science and Engineering Wuhan University of Science and Technology Wuhan China School of Information Science and Engineering Wuhan University of Science and Technology Wuhan430064 China Engineering Research Center of Metallurgical Automation and Measurement Technology Wuhan University of Science and Technology Wuhan430064 China

ISBN: (纸本)9798331521950

关键词： Bearings (machine parts)

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Coupling of Magnetic Field Noise in Multilayer Magnetic Shields for Atomic Magnetometer

TechRxiv

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TechRxiv 2023年

作者： Wang, Zixuan Zhang, Mengshi Yang, Ke Yu, Tingting Lv, Bihu Zhang, Ning Guo, Jia Chen, Yao Li, Dezhao Wang, Xiaolong The Research Center for Quantum Sensing Research Institute of Intelligent Sensing Zhejiang Lab Zhejiang Hangzhou311100 China The Zhejiang Provincial Key Laboratory of Quantum Precision Measurement College of Science Zhejiang University of Technology Hangzhou310023 China The Zhejiang Lab Zhejiang Hangzhou311100 China The Xi’an Modern Control Technology Research Institute Xi’an710065 China The School of Instrument Science and Techonology Xi’an Jiaotong University Xi’an710049 China

Ferrite materials are used as magnetic shielding to reduce ultra-low magnetic field noise and interference in ultra-high precision magnetic measurement instruments, including atomic magnetometers. However, there was a shielding coupling between the inner and outer layer of magnetic shields, which affected the shielding effect of the magnetic shields. This study analyzed the magnetic field noise coupling between magnetic shields, and measured the residual magnetic field. Then, after demagnetizing and compensating the coil to remove residual magnetic field, a SERF atomic magnetometer was used to study the coupling magnetic field noise on ferrite. A thermal magnetic noise of 210 ƒ-1/2·fT had a significant impact on the magnetic field noise of low-frequency Mn-Zn ferrite shield. The sensitivity decreased from 0.737 fT/Hz1/2 to 9.223 fT/Hz1/2@30Hz, and the magnetic field noise raised to 70.05 ƒ-1/2·fT. The study indicated that the secondary outer layer has a significant impact on the coupling magnetic field noise and magnetic shielding performance of ferrite, while the impact of thermal magnetic noise on the magnetic field noise of ferrite is related to frequency and bandwidth. The research provides a reference for the application of ferrite magnetic shields in atomic magnetometers and the development of shielding devices with wide-frequency electromagnetic shields. © 2023, CC BY-NC-SA.

关键词： Ferrite

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High-throughput separation of microplastic particles using a biomimetic filter in a serpentine microchannel

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Separation and Purification technology 2025年

作者： Xiao Hu Longfei Yu Zuchao Zhu Chengxu Tu Fubing Bao Peifeng Lin Jianzhong Lin Zhejiang Key Laboratory of Multiflow and Fluid Machinery Zhejiang Sci-Tech University Hangzhou Zhejiang 310018 PR China Zhejiang Provincial Key Laboratory of Flow Measurement Technology China Jiliang University Hangzhou Zhejiang 310027 PR China Department of Mechanics State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang University 310027 Hangzhou PR China

Currently, how to quickly and efficiently separate microplastic particles is a hot research topic in water purification and microfluidic chips. In light of this, a structure bioinspired by the filter-feeding organ of manta rays is proposed. It achieves rapid, efficient, and convenient separation of microplastic particles by leveraging the continuous direction changes of Dean secondary flow in the serpentine channel. This biomimetic microfluidic filter is capable of filtering particles smaller than the minimum spacing between the filtering lobes, while high throughput is maintained. The optimal flow rate reaches up to 7 mL min −1 (corresponding to a Reynolds number of 893). The maximum filtration efficiencies for 5, 10, 15, and 20 μm particles are 70.46 %, 96.29 %, 97.44 %, and 97.82 %, respectively. Meanwhile, by simulating the complex flow field within the microfluidic chip, we elucidate three underlying working principles: “attraction”, “ricochet”, and “collision”. Subsequently, the effect of curvature of the serpentine channel on the filtration efficiency, flow rate ratio and energy consumption are discussed. Finally, a polydisperse suspension containing 10 μm particles and yeast cells is separated. This demonstrates that the biomimetic microfluidic filter can handle complex environmental samples. This portable biomimetic micro-fluidic filter features simple operation, high throughput, high efficiency, and self-cleaning capabilities, providing an innovative platform for the continuous filtration of microplastic particles.

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Transient dynamics of magneto-optic rotation with elliptically polarized light

引用

Results in Physics 2024年 60卷

作者： Zhao, Binbin Tang, Junjian Li, Lin Zhang, Yaohua Zhai, Yueyang Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology Ministry of Education School of Instrumentation and Optoelectronic Engineering Beihang University Beijing 100191 China Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology Hangzhou Innovation Institute Beihang University Hangzhou 310051 China School of Physics Beihang University Beijing 100191 China Hefei National Laboratory Hefei 230088 China

In this paper, we analyze the transient behavior of nonlinear magneto-optical rotation in a 87Rb vapor cell. Our focus is on optimizing the optical rotation signal by identifying influential factors. We investigate th... 详细信息

In this paper, we analyze the transient behavior of nonlinear magneto-optical rotation in a ⁸⁷Rb vapor cell. Our focus is on optimizing the optical rotation signal by identifying influential factors. We investigate the impact of cell temperature on alkali atom density and consider characteristics of the light field, such as polarization direction, frequency, intensity, and beam diameter. Low scanning magnetic field rates produce the usual absorption signal, whereas high rates show an asymmetric transient response with oscillatory decay. To further investigate this phenomenon, we evaluate signal amplitude and resonant peaks along the x-, y-, and z-axis directions. Notably, we establish a one-dimensional quadratic equation that describes the relationship between magnetic field scan rate and signal amplitude/peak value. Our findings facilitate the quick evaluation of cell performance, provide insights into the dynamics of ground-state coherence generation, and have potential applications in detecting transient spin coupling or monitoring magnetic fields. © 2024 The Author(s)

关键词： Nonlinear magneto-optical rotation Scanning magnetic field rate Transient behavior

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Search for New Particles with Flying Quantum Sensors in Space

arXiv

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arXiv 2024年

作者： Huang, Xingming Wang, Yuanhong Jiang, Min Kang, Xiang Su, Haowen Wang, Zehao Lin, Qing Zheng, Wenqiang Sun, Yuan Liu, Liang Peng, Xinhua Zhao, Zhengguo Du, Jiangfeng CAS Key Laboratory of Microscale Magnetic Resonance School of Physical Sciences University of Science and Technology of China Anhui Hefei230026 China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Anhui Hefei230026 China Hefei National Laboratory University of Science and Technology of China Hefei230088 China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei230026 China Deep Space Exploration Laboratory Department of Modern Physics University of Science and Technology of China Hefei230026 China Zhejiang Provincial Key Laboratory Collaborative Innovation Center for Quantum Precision Measurement College of Science Zhejiang University of Technology Hangzhou310023 China Key Laboratory of Quantum Optics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai201800 China Institute of Quantum Sensing School of Physics Zhejiang University Hangzhou310027 China

Recent advancements in space science and technologies offer exciting prospects for investigating novel research that is unattainable within terrestrial laboratories. Here we propose the implementation of space-based quantum sensing to explore ultralight new particles beyond the standard model. The central idea involves probing long-range interactions between spin ensembles of space quantum sensors and the particles residing within Earth, mediated by ultralight particles. We show that such interactions can be substantially enhanced in space platforms and thus increase the search sensitivity. In contrast to their terrestrial counterparts, space-based quantum searches exhibit remarkable velocity enhancements, approaching the first cosmic speed, and thus enables the exploration of unexplored parameter space concerning ultralight new particles. Furthermore, the substantial abundance of electrons and nucleons within Earth plays a crucial role in extending the scope of our mission. Our projected search sensitivity can surpass the sensitivities of both terrestrial experiments and proposals by up to approximately 7 orders of magnitude. We also briefly discuss other space mission, including "space-ground integrated" network of quantum sensors for dark matter searches. Copyright © 2024, The Authors. All rights reserved.

关键词： Dark Matter

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Analysis of Comprehensive Magnetic Shielding and Optimization Design of High-Conductive Layers in Magnetic Shielding Devices for Atomic Magnetometer

SSRN

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SSRN 2023年

作者： Sun, Jinji Ren, Jianyi Xu, Xueping Zhou, Weiyong Qian, Jiang Wang, Hanmou Wang, Haofan Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology Ministry of Education School of Instrumentation and Optoelectronic Engineering Beihang University Beijing100191 China Zhejiang Provincial Key Laboratory of Ultra-Weak Magnetic-Field Space and Applied Technology Hangzhou Innovation Institute Beihang University Hangzhou310051 China Hangzhou Extremely Weak Magnetic Field Major Science and Technology Infrastructure Research Institute Hangzhou310051 China

Since the frequency of the biological magnetic field is DC to 500Hz, it is important to improve the ability of the magnetic shielding device within this range for the measurement of the biological magnetic field and the reduction of the magnetic noise of the SERF magnetometer. At present, the optimization of AC magnetic field shielding in the frequency range of 0.01 to 500 Hz is rarely considered. To optimize the AC shielding factor, this paper analyzed the influence of the position and structure of the high-conductive layer in the magnetic shielding device and proposed an optimized structure of the high conductive layer. What’s more, the theoretical formula was improved by introducing frequency coefficients, solving the problem of significant differences between theoretical calculation results, FEM results and measurement results. Finally, it was verified by experiments that the optimized high-conductivity layer structure can improve the AC shielding factor of magnetic shielding device. © 2023, The Authors. All rights reserved.

关键词： Magnetic shielding

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