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Enhancing output performance of triboelectric nanogenerator by increasing charge storage capacity of electrodes

Nano Research 2025年第1期18卷 395-403页

作者： Congcong Hao Zekun Wang Mingzhe Cai Shuaining Cheng Zhongxin Wang Cong Zhai Juan Cui Yongqiu Zheng Chenyang Xue Key Laboratory of Instrumentation Science and Dynamic Measurement Ministry of Education North University of ChinaTaiyuan 030051China

The practical application of rotating triboelectric nanogenerators is often limited by the wear of high-friction surface materials and low surface charge *** addition to the charge pump replenishment strategy,suppressing charge decay is also crucial for increasing surface charge ***,we present a high performance rotary triboelectric nanogenerator(HPR-TENG)based on a coplanar charge pumping strategy and polyvinyl chloride(PVC)*** has been demonstrated that applying PVC film to the surface of the storage electrode of the main TENG(M-TENG)significantly enhances the M-TENG’s output ***,the HPR-TENG with three layers of PVC film pasted achieved the best output performance,with a peak-topeak output voltage of 2828 V,a peak-to-peak output current of 327μA and a charge transfer of 0.81μC at 500 *** addition,the output improvement effects of different materials are *** TENG with 3 layers of PVC film pasted on it has a maximum output power of 748 mW at a load resistance of 4×10^(6)Ω.HPR-TENG’s output performance remains consistent after 100,000 cycles,which shows excellent *** excellent electrical performance of the HPR-TENG can be used as the energy supply for the tip high-voltage breakdown sensor system,which can achieve 14 breakdowns in 10 *** to its extraordinary electrical performance,HPRTENG can not only serve as an energy supply for cutting-edge high-voltage breakdown sensor systems,but also has the potential to serve as an energy supply for high-pressure sterilization,high-pressure vacuum and water electrolysis.

关键词： triboelectric nanogenerator coplanar charge pump enhancing charge density suppressing charge decay polyvinyl chloride(PVC)film

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Ultrasound Wireless Electricity Transmission Technology Based on the Double Matching Layers Ultrasonic Transducer

Ultrasound Wireless Electricity Transmission Technology Base...

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International Conference of Electrical, Electronic and Networked Energy Systems, EENES 2024

作者： Zhang, Bingrui Cui, Juan Qi, Bowen Wang, Zheng Zheng, Yongqiu Xue, Chenyang The Key Laboratory of Instrumentation Science & Dynamic Measurement Ministry of Education North University of China Taiyuan030051 China

ISBN: (纸本)9789819618514

Currently, ultrasound–based wireless electricity transmission (WET) is a very valuable research technology, but it has problems such as low electricity transfer efficiency and high safety hazards. In this manuscript, we propose the double matching layers structure–based ultrasound wireless electricity transmission system (DWET) with high efficiency and high safety, which can be used for internal condition monitoring of closed metal cavity equipment such as gas pipelines, submarines and gas storage tanks. According to the mason equivalent circuit model, the electricity–ultrasound–electricity conversion process of the system is converted into a circuit model of a two–port network, and the double matching layers structure of the ultrasonic transducer is introduced in this process for analysis. An experimental test system was built to test and analyze the input–output characteristics of the whole system, and the measured results have a high degree of fit with the simulation results. The final experimental results show that the electricity transfer efficiency of the system is improved from 29.3% to 36.5%, and the output capacity of the system is improved. And most importantly, the designed system has a high degree of safety, which accelerates the application of ultrasound wireless electricity transmission technology for wireless health monitoring of closed metal equipment. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Ultrasonic transducers

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dynamic Testing and Compensation for Marine Temperature Sensors Based on Fireworks Algorithm

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IEEE Sensors Journal 2025年第9期25卷 14696-14708页

作者： Zhang, Shiqiang Zhang, Zengxing Wang, Yonghua Guo, Yuzhen Jing, Junmin Yao, Bin Liu, Jianwei Li, Meng Qiao, Yanan Cui, Danfeng Xue, Chenyang North University of China Key Laboratory of Instrumentation Science and Dynamic Measurement Taiyuan030051 China Xiamen University Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen361002 China Tan Kah Kee Innovation Laboratory Xiamen361005 China

Packaged temperature sensors exhibit significant thermal hysteresis effects, which directly impact their dynamic performance and accuracy during rapid temperature variations in marine environments. This article focuses on platinum resistance thermometers (PRTs), which are commonly used in oceanic applications, and a dynamic testing method was proposed that employs temperature step excitation within a fully liquid environment, along with a full range dynamic error compensation approach based on the fireworks algorithm (FWA). Initially, a dynamic testing system was developed, and its testing repeatability was verified. Subsequently, a sample database for PRTs at various temperature steps was created. By optimizing the fitness function, the FWA was utilized on the sample database during the iterative process to design a dynamic error compensation filter. The resulting compensation filter demonstrated enhanced universality across various temperature step sizes within the sensor measurement range. Through the filter’s compensation, the rise time of the packaged PRT was reduced from an average of 477–121 ms within the measurement range. Furthermore, the dynamic response characteristics of the packaged PRT closely resembled those of the bare PRT. The dynamic testing method, which simulates heat transfer in real-world scenarios, in conjunction with the dynamic compensation method introduced in this article, can also be employed to achieve dynamic compensation for sensors operating under diverse testing principles. © 2001-2012 IEEE.

关键词： Temperature sensors

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Advanced Approaches to Immersion Nondestructive measurements of Ionic Conductivity Gradients in Multiphase Aqueous Environments: A Review

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IEEE Sensors Journal 2025年第9期25卷 14484-14504页

作者： Guo, Yuzhen Zhang, Zengxing Xue, Chenyang Zheng, Jianyi Hai, Zhenyin Zhang, Shiqiang Liu, Jianwei Zhang, Wenjun Jing, Junmin Yao, Bin Xu, Yanbo Ouyang, Weihong Song, Tianming Shi, Bowei North University of China Key Laboratory of Instrumentation Science and Dynamic Measurement Taiyuan030051 China Xiamen University Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen361002 China Xiamen University Department of Mechanical and Electrical Engineering Xiamen361005 China

The gradient of the ionic conductivity is a critical factor for assessing the spatial variability of ionic distributions, as evident in the complex dynamics that are characteristic of various aqueous environments. Accurate observations of the conductivity fluctuations resulting from ion movement in solutions are essential for determining the purity of the aqueous phase and the surrounding environment. This study presents a comprehensive overview of nondestructive immersion measurements of ionic conductivity gradients. The phenomena associated with these gradients arise from intrinsic differences in the medium physical properties, the wide variety of ion characteristics, the intricacies of interfacial conditions, and the interactions between chemical mass transport phenomena in aqueous settings. A thorough review of the latest advancements in ionic conductivity gradient detection methodologies based on electrical, optical, and acoustic principles is presented, highlighting the key milestones and breakthroughs achieved to date. Furthermore, the ionic conductivity gradient formation principles and underlying mechanisms are reviewed, and different electrode measurements, inductively coupled systems, optical refractometry systems, and acoustic velocity evaluation measurements are classified. Additionally, the applications of nondestructive immersion measurements in water quality monitoring, oceanographic research, chemical production, industrial process control, and other ion-involving electrochemical reactions are summarized. The prospects and future directions for enhancing the cost-effectiveness of field nondestructive testing and long-term stability of the equipment using new materials, structures, and AI technologies are also discussed. The technological innovation in nondestructive immersion measurements is expected to catalyze transformative changes in the optimization of chemical production, ushering in a new era of efficiency and control in industrial processes.

关键词： Photodissociation

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A wearable flexible humidity sensor with high-density and large-thickness interdigital electrodes and sensitive CQD bundles for urination monitoring in diapers

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science China Materials 2025年第4期68卷 1154-1161页

作者： Yuefang Zhao Huabin Yang Qirui Zhang Cheng Lei Na Zhou Rongrui Shi Lei Shi Jintao Wu Houming Luo Haiyang Mao Institute of Microelectronics of the Chinese Academy of Sciences Beijing 100029China College of Future Technology Peking UniversityBeijing 100091China University of Chinese Academy of Sciences Beijing 100049China North University of China Key Lab of Instrumentation Science&Dynamic MeasurementTaiyuan 030051China

This work proposes a fabrication technique that can achieve wafer-level preparation of flexible interdigital electrodes(IDEs)with high-density and large-thickness(HD&LT).Utilizing these HD&LT flexible IDEs,we ... 详细信息

This work proposes a fabrication technique that can achieve wafer-level preparation of flexible interdigital electrodes(IDEs)with high-density and large-thickness(HD<).Utilizing these HD< flexible IDEs,we developed a flexible humidity sensor that employs a composite material made of nanowire bundles with carbon quantum dots(CQDBs)for humidity *** this device,the composite material facilitates high absorption and capillary condensation of water molecules across various relative humidity(RH)conditions,while the HD< IDEs enhance the effective sensing ***,we achieve a flexible humidity sensor with exceptional *** sensor not only boasts key attributes such as low cost,easy fabrication,and straightforward operation but also establishes a foundation for extensive humidity sensing *** comparison to other devices utilizing small-thickness and low-density IDEs,our sensor demonstrates remarkable 2.5-fold and 5.8-fold increase in sensitivity across humidity ranges of 7%-59%RH and 59%-97%RH,*** explore the practical applications of the device,we demonstrate its functionality in diaper humidity *** characteristics of wearability and durability,the sensor shows significant potential for humidity monitoring in wearable electronics.

关键词： flexible interdigital electrodes nanowire bundles with carbon quantum dots electroplating nanoforests flexible humidity sensors

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IoT-based cloud monitoring system for building fires

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International Journal of Metrology and Quality Engineering 2025年 16卷

作者： Pan, Guanhong Xie, Yanzhang Yang, Qingping Department of Mechanical and Aerospace Engineering Brunel University London United Kingdom Key Laboratory of Instrumentation Science & Dynamic Measurement Ministry of Education North University of China Taiyuan030051 China

This paper presents an IoT (Internet of Things) based smart building fire cloud monitoring system to enhance fire safety in smart buildings. It integrates low-cost sensors and real-time video surveillance for real-time environmental data collection. Data are uploaded to the cloud for remote monitoring via a custom web interface. The system features an artificial neural network model that reduces computational complexity and response time, achieving >95% accuracy in fire prediction. It assists in planning evacuation routes based on fire location, enhancing safety and efficiency. laboratory and field tests confirm reliable performance, and the novel system will find applications in smart fire detection and prevention. © G. Pan et al., Published by EDP sciences, 2025.

关键词： Fires

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A novel wearable device integrating ECG and PCG for cardiac health monitoring

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Microsystems & Nanoengineering 2025年第1期11卷 173-185页

作者： Junbin Zang Qi An Bo Li Zhidong Zhang Libo Gao Chenyang Xue College of Information Engineering Shanxi College of TechnologyShuozhou 036000China Key Laboratory of Instrumentation Science and Dynamic Measurement Ministry of Education North University of China030051 TaiyuanChina Department of Mechanical and Electrical Engineering Xiamen University361102 XiamenChina

The alarming prevalence and mortality rates associated with cardiovascular diseases have emphasized the urgency for innovative detection *** methods,often costly,bulky,and prone to subjectivity,fall short of meeting the need for daily *** and portable wearable monitoring devices have emerged as a promising research *** study introduces a wearable system that integrates electrocardiogram(ECG)and phonocardiogram(PCG)*** ingeniously pairing a contact-type PZT heart sound sensing structure with ECG electrodes,the system achieves the acquisition of high-quality ECG and PCG ***,the signal-to-noise ratios(SNR)for ECG and PCG signals were measured at 44.13 dB and 30.04 dB,respectively,demonstrating the system’s remarkable stability across varying *** collected signals were subsequently utilized to derive crucial feature values,including electromechanical delay(EMD),left ventricular ejection time(LVET),and pre-ejection period(PEP).Furthermore,we collected a dataset comprising 40 cases of ECG and PCG signals,enabling a comparative analysis of these three feature parameters between healthy individuals and coronary heart disease *** research endeavor presents a significant step forward in the realm of early,non-invasive,and intelligent monitoring of cardiovascular diseases,offering hope for earlier detection and more effective management of these life-threatening conditions.

关键词： wearable device portable wearable monitoring devices phonocardiogram wearable system electromechanical delay cardiovascular diseases electrocardiogram cardiac health monitoring

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Adaptive Critic Attitude Learning Control for Hypersonic Morphing Vehicles without Backstepping

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IEEE Transactions on Aerospace and Electronic Systems 2025年

作者： Li, Shihong Shao, Xingling Wang, Hongyu Liu, Jun Zhang, Qingzhen School of Instrument and Electronics North University of China Taiyuan030051 China State Key Laboratory of Instrumentation Science & Dynamic Measurement Taiyuan030051 China School of Electrical and Control Engineering North University of China Taiyuan030051 China School of Automation Science and Electrical Engineering Beihang University Beijing100191 China

This paper proposes an adaptive critic attitude learning control for hypersonic morphing vehicles (HMVs) under large uncertainties and deformation. Firstly, to remove the recursive design complexity caused by backstepping, an attitude-morphing coupled model in Brunovsky form is created by introducing a coordinate transformation. Secondly, a disturbance compensation controller is designed without using backstepping, wherein a resource-saving yet efficient unknown system dynamics estimator (USDE) is introduced to estimate the lumped uncertainties by a simple filtering operation. Then, a near optimal regulator capable of online learning is developed under a critic-only adaptive © 2022 IEEE.

关键词： Backstepping

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Tsaeeg-Cl: A Tempo-Spatial Attention Eeg Model with Contrastive Learning for Vrms Susceptibility Detection

SSRN

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SSRN 2025年

作者： Hua, Chengcheng Dai, Zhian Chen, Yuechi Tao, Jianlong Yang, Wenqing Chen, Dapeng Liu, Jia Fu, Rongrong School of Automation C-IMER CICAEET Nanjing University of Information Science & Technology Nanjing210044 China Measurement Technology and Instrumentation Key Lab of Hebei Province Department of Electrical Engineering Qinhuangdao066000 China

The Virtual Reality Motion Sickness (VRMS) has hindered the development of virtual reality technology. One of the key factors determining the severity of a user's VRMS symptoms is the VRMS susceptibility. In order to explore how the susceptibility modulate the brain activity, and detect the VRMS susceptibility through the EEG, this paper designs a simulated flight mission and adaptive training experiment to obtain the different susceptibility from the same experimental conditions. And we propose an end-to-end model to detect the VRMS susceptibility based on EEG. The proposed model first compresses the EEG time dimension through convolution and pooling. Then it performs time embedding and lead embedding, and uses the multi-head self-attention layer on the time and lead dimensions respectively to extract their intra-dimensional correlation features. In final, the temporal and spatial features are fused to do the classification. In addition, in order to enhance the features, we also introduce a contrastive learning to compare the features of the target and benchmark data. The results show that the accuracy of the proposed model in recognizing the resting EEG data before and after the adaptive training reached 99.48%, which prove that the proposed model can be used to identify the VRMS susceptibility. This method provides a new idea for unified processing of spatial and temporal information of EEG and is expected to optimize the virtual reality technology and improve the user experience as an objective indicator of VRMS susceptibility. © 2025, The Authors. All rights reserved.

关键词： Contrastive Learning

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Coupled-resonator-induced transparency in two microspheres as the element of angular velocity sensing

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Chinese Physics B 2016年第11期25卷 283-287页

作者：钱坤唐军郭浩张伟刘建华刘俊薛晨阳张文栋 Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education North University of China

We proposed a two-coupled microsphere resonator structure as the element of angular velocity sensing under the Sagnac *** analyzed the theoretical model of the two coupled microspheres,and derived the coupled-resonatorinduced transparency（CRIT） transfer function,the effective phase shift,and the group *** were also carried out to demonstrate the CRIT phenomenon in the two-coupled microsphere resonator *** calculated that the group index of the two-coupled sphere reaches n_g = 180.46,while the input light at a wavelength of 1550 nm.

关键词： resonator transparency microsphere angular tunable reaches gallery coupler waveguide spheres

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