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A highoutput PDMS-MXene/gelatin triboelectric nanogenerator with the petal surface-microstructure

Nano Research 2024年第5期17卷 4151-4162页

作者： Zekun Wang Congcong Hao Mingzhe Cai Juan Cui Yongqiu Zheng chenyang xue Key Laboratory of Instrumentation Science&Dynamic Measurement Ministry of Education North University of ChinaTaiyuan 030051China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 611731China

Triboelectric nanogenerator(TENG)has a promising future in the field of energy harvesting and self-powered sensing due to their simplicity in structure,low cost,and efficient energy harvesting from the surrounding *** output electrical performance of TENG can be improved by doping the friction material with functional materials and modifying the surface of the friction ***,the current method of adding functional materials to friction materials is costly and wasteful,and the method of modifying the surface structure of friction materials is cumbersome and not easy to *** this work,we present a polydimethylsiloxane(PDMS)-MXene/gelatin triboelectric nanogenerator(PMMG-TENG)based on petal surface-microstructures,which has the advantages of low cost,simple preparation,high output performance,and ecological *** doping 0.03 wt.%of MXene in PDMS,the output electrical performance of TENG can be significantly improved,with an output current increase of up to 139.7%.Four different petals are used as natural molds to prepare *** results show that PMMG-TENG with peony petal surface microstructure has the best electrical performance,and the output current increase of up to 228.17%compared with PMMG-TENG without *** PMMG-TENG with peony petal surface-microstructure exhibits excellent electrical performance,demonstrating a maximum open-circuit voltage of 417.39 V and a maximum short-circuit current of 12.01μA at a size of 3 cm×3 cm,and a maximum power density of 170μW/cm^(2) at a load resistance of 107Ω.The PMMG-TENG’s output performance after 10,000 cycles is consistent with the initial state,highlighting excellent output *** PMMG-TENG can easily light up at least 100 light emitting diodes(LEDs).(operating voltage 3V.)Gelatin film exhibits excellent degradation performance,with complete degradation time of only 150 s in water at a constant temperature of 75℃.PMMG-TENG not only shows excellent performance in

关键词： triboelectric nanogenerator(TENG) petal surface-microstructure gelatin MXene energy harvesting

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Wearable multichannel-active pressurized pulse sensing platform Yunlong

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Microsystems & Nanoengineering 2024年第3期10卷 283-292页

作者： Zhao Qingxia Sun Shixuan Mei Libo Gao Xikuan Zhang Zekun Yang xueli Nan Haiyan Zhang chenyang xue Junyang Li Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen University361102 XiamenChina Discipline of Intelligent Instrument and Equipment Xiamen University361102 XiamenChina Department of Electronic Engineering Ocean University of China266000 QingdaoChina School of Automation and Software Engineering Shanxi University030006 TaiyuanChina Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) 361005 XiamenChina Key Laboratory of Instrumentation Science and Dynamic Measurement Ministry of Education North University of China030051 TaiyuanChina Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou Institute of PhysicsChinese Academy of Space Technology730000 LanzhouChina

With the modernization of traditional Chinese medicine(TCM),creating devices to digitalize aspects of pulse diagnosis has proved to be *** currently available pulse detection devices usually rely on external pressure devices,which are either bulky or poorly integrated,hindering their practical *** this work,we propose an innovative wearable active pressure three-channel pulse monitoring device based on TCM pulse diagnosis *** combines a flexible pressure sensor array,flexible airbag array,active pressure control unit,advanced machine learning approach,and a companion mobile application for human–computer *** to the high sensitivity(460.1 kPa^(−1)),high linearity(R^(2)>0.999)and flexibility of the flexible pressure sensors,the device can accurately simulate finger pressure to collect pulse waves(Cun,Guan,and Chi)at different external pressures on the *** addition,by measuring the change in pulse wave amplitude at different pressures,an individual’s blood pressure status can be successfully *** enables truly wearable,actively pressurized,continuous wireless dynamic monitoring of wrist pulse *** innovative and integrated design of this pulse monitoring platform could provide a new paradigm for digitizing aspects of TCM and other smart healthcare systems.

关键词： pulse diagnosis enable

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基于介电特性的含冰月壤含水率反演方法研究

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机械工程学报 2024年第2期60卷 313-322页

作者：段骁航张伟伟薛晨阳姜生元迟关心哈尔滨工业大学宇航空间机构及控制研究中心哈尔滨150001

水冰勘探是地外天体采样与原位资源利用领域的研究热点之一,探地雷达和就位阻抗测量是基于介电特性的典型手段,通过对星壤介电系数数据反演可以获取水冰组分的质量占比。月球水冰的特殊赋存环境和赋存状态使介电类水冰勘探手段与地球水... 详细信息

水冰勘探是地外天体采样与原位资源利用领域的研究热点之一,探地雷达和就位阻抗测量是基于介电特性的典型手段,通过对星壤介电系数数据反演可以获取水冰组分的质量占比。月球水冰的特殊赋存环境和赋存状态使介电类水冰勘探手段与地球水资源勘探有所差异。此研究通过搭建深低温真空条件下的介电参数测量装置,采用低含水率损耗的特殊真空低温样本制备规程,制备标准尺寸介电测量试样块。获取宽温度范围100~250 K、含水率范围0~10%的含冰模拟月壤20 Hz~1 MHz介电谱,分析含冰模拟月壤混合介质的介电特性与温度、频率间相关性,并拟合不同温度、频率条件下的含水率与介电系数实部间函数关系,探究不同温度、频率条件下含水率反演的灵敏度。根据试验结论,提出一种基于低频介电系数实部的月球极区含冰月壤的含水率就位数据反演方法,通过试验验证反演方法的可行性和精度。

关键词：月球水冰含水率介电系数介电弛豫灵敏度

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超声波无线电能传输的声电通道设计

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中国测试 2024年第4期50卷 90-96,108页

作者：臧俊斌李瑜祁博文崔娟薛晨阳山西工学院信息工程学院山西朔州036000 中北大学省部共建动态测试技术国家重点实验室山西太原030051

为了解决磁耦合方式无线电能传输技术在金属障碍环境下因涡流效应而效率低下问题,该文开展了金属障碍环境下超声无线电能传输技术研究。首先从声学的角度分析能量传输通道参数对声波透射系数的影响规律,并指导完成通道参数的配置。然后... 详细信息

为了解决磁耦合方式无线电能传输技术在金属障碍环境下因涡流效应而效率低下问题,该文开展了金属障碍环境下超声无线电能传输技术研究。首先从声学的角度分析能量传输通道参数对声波透射系数的影响规律,并指导完成通道参数的配置。然后,采用同时共轭阻抗匹配技术完成通道输入端口与输出端口的阻抗匹配网络设计,并通过实验验证阻抗匹配网络的有效性。测试结果表明,该文所设计的超声波无线电能传输系统透11 mm厚304不锈钢障碍的理论最佳传输效率为68%,进行同时共轭阻抗匹配后通道的实际能量传输效率为56.25%,传输功率达51.53 W。该研究所达到的能量传输效率和传输功率均能满足绝大部分使用需求。该技术在军事、航天等领域具有较好的应用前景。

关键词：超声波无线电能传输声学通道设计共轭阻抗匹配

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A stretchable triboelectric generator with coplanar integration design of energy harvesting and strain sensing

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Science China(Technological Sciences) 2022年第1期65卷 221-230页

作者： WU Bin ZHANG ZengXing xue XiaoBin HAO CongCong ZHANG WenJun BI RuiYu WANG Qiang xue chenyang Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China

The rapid development of flexible triboelectric nanogenerators(TENGs)has become an alternative to batteries for wearable ***,multifunctional,and low-cost are the primary development directions for these wearable devices based on ***,a stretchable triboelectric generator with coplanar integration was designed for energy harvesting and force *** industrial conductive silicone and silicone were used to fabricate the TENG with a thickness of less than 0.9 *** the elongation was less than 150%,TENG exhibited excellent linear characteristics in the resistance-tensile strain correspondence,and the coefficient of determination was *** stretchable TENG with a sufficient contact area of 9 cm^(2) could generate a short-circuit current of 2μA when it was in contact with the ***,an intelligent tension monitoring wearable device that can effectively measure the tensile force was *** a stretchable,coplanar integration-based,and low-cost wearable device has excellent applicability in wearable electronics.

关键词： wearable device stretchable force monitoring multifunctional materials

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Coil-levitated hybrid generator for mechanical energy harvesting and wireless temperature and vibration monitoring

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Science China(Technological Sciences) 2021年第6期64卷 1325-1334页

作者： xue XiaoBin ZHANG ZengXing WU Bin HE ShanShan WANG Qiang ZHANG WenJun BI RuiYu CUI Juan ZHENG YongQiu xue chenyang Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China

The development of wireless monitoring is currently restricted by the short lifetime of batteries,requiring frequent *** of abundant mechanical energy from the surrounding environment has attracted increasing attention in real-time ***,a coil-levitated hybrid generator was developed for the efficient harvesting of mechanical energy from mechanical *** novel coil-levitated structure adapted to the metal and magnetic *** output currents were systematically analyzed at different operation modes based on the unique combination of triboelectrification,electromagnetic induction,and piezoelectric *** the excitation of vibration frequency and amplitude of 8 Hz and 5 mm respectively,the as-constructed triboelectric nanogenerator delivered a peak power density of 11.40 W/m3 at 10 MΩ.Meanwhile,the middle electromagnetic part and bottom piezoelectric generator provided peak power densities of 6.97 and 79.93 W/m2 at 10000Ω,*** importantly,the battery charging experiment was verified,in which a 30 mA h Li-ion battery can be charged from 2.57 to 3.27 V in about 90 *** sum,a self-powered temperature and vibration monitoring system was successfully developed based on hybrid generator,promising for realizing wireless monitoring of mechanical equipment without any external power supply.

关键词： hybrid generator coil levitation self-powered wireless monitoring

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AUV终端对接的单目视觉导引方法研究

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Journal of Measurement Science and Instrumentation 2024年第2期15卷 216-223页

作者：王秋生齐向东薛晨阳刘丹王永华王景楠中北大学仪器科学与动态测试教育部重点实验室山西太原030051

在水下复杂环境中高效回收自主潜水器(AUV)是一项重大的技术挑战。本文提出了一种利用单目视觉检测和跟踪对接站上光环标识进行终端对接的方法。为了提高光源特征识别,本文改进了Canny边缘检测算法,采用自适应阈值方法动态调整光源轮廓... 详细信息

在水下复杂环境中高效回收自主潜水器(AUV)是一项重大的技术挑战。本文提出了一种利用单目视觉检测和跟踪对接站上光环标识进行终端对接的方法。为了提高光源特征识别,本文改进了Canny边缘检测算法,采用自适应阈值方法动态调整光源轮廓,并在阈值最优时采用最小外接圆方法确定光源中心。此外,利用几何位置和面积约束消除水面反射的干扰。在视觉定位和跟踪方面,采用张氏标定法获取相机的内部参数和畸变参数,通过比较光环中心和图像中心来估计AUV的航向和俯仰偏差,然后利用位置-姿态PID控制器进行快速跟踪。水池实验结果表明,该方法简单实用,鲁棒性强,能够为未来水下机器人的可靠回收提供一定技术参考。

关键词：自主潜水器(AUV) 终端对接单目视觉位姿估计图像处理

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Coupled resonator-induced transparency on a three-ring resonator

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Chinese Physics B 2018年第7期27卷 371-375页

作者： Xinquan Jiao Haobo Yu Miao Yu chenyang xue Yongfeng Ren Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China Key Laboratory of Instrumentation Science ＆ Dynamic Measurement（Ministry of Education） North University of ChinaTaiyuan 030051China

The coupled resonator-induced transparency （CRIT） phenomenon, which is analogous to electromagnetically induced transparency in atomic systems, can occur in an original integrated optical resonator system due to the coherent interference of the coupled optical resonators. The system was composed of three ring resonators on silicon, each with the same cavity size, and the optical coupling to the input and output ports was achieved using grating with a power coupling efficiency of 36%. A CRIT resonance whose spectrum shows a narrow transparency peak with a low group velocity was demonstrated. The quality factor of the ring resonator can attain a value up to 6x 104, and the harmonic wavelength can be controlled by adjusting the temperature. The through and drop transmission spectra of the resonator are reconciled well with each other and also consistent well with the theoretical analysis.

关键词： coupled resonator-induced transparency three-ring resonator coupling efficiency transmission spectra quality factor

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Design and implementation of a jellyfish otolith-inspired MEMS vector hydrophone for low-frequency detection

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Microsystems & Nanoengineering 2021年第1期7卷 41-50页

作者： Renxin Wang Wei Shen Wenjun Zhang Jinlong Song Nansong Li Mengran Liu Guojun Zhang chenyang xue Wendong Zhang State Key Laboratory of Dynamic Testing Technology North University of ChinaTaiyuanChina College of Underwater Acoustic Engineering Harbin Engineering UniversityHarbinChina Hubei Key Laboratory of Modern Manufacturing Quantity Engineering School of Mechanical EngineeringHubei University of TechnologyWuhanHubeiChina

Detecting low-frequency underwater acoustic signals can be a challenge for marine *** by the notably strong response of the auditory organs of pectis jellyfish to ultralow frequencies,a kind of otolith-inspired vector hydrophone(OVH)is developed,enabled by hollow buoyant spheres atop *** parametric analysis is performed to optimize the cilium structure in order to balance the resonance frequency and *** the structural parameters of the OVH are determined,the stress distributions of various vector hydrophones are simulated and *** shock resistance of the OVH is also ***,the OVH is fabricated and *** receiving sensitivity of the OVH is measured to be as high as−202.1 dB@100 Hz(0 dB@1 V/μPa),and the average equivalent pressure sensitivity over the frequency range of interest of the OVH reaches−173.8 dB when the frequency ranges from 20 to 200 *** 3 dB polar width of the directivity pattern for the OVH is measured as 87°.Moreover,the OVH is demonstrated to operate under 10 MPa hydrostatic *** results show that the OVH is promising in low-frequency underwater acoustic detection.

关键词： underwater spheres hydrostatic

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Magnetically levitated/piezoelectric/triboelectric hybrid generator as a power supply for the temperature sensor

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Science China(Technological Sciences) 2017年第7期60卷 1068-1074页

作者： ZHANG ZengXing HE Jian HAN JianQiang XU HongYan MU JiLiang WEN Tao WANG DaWei TIAN ZhuMei CHEN ZeTian xue chenyang Science and Technology on Electronic Test and Measurement Laboratory North University ofChina Taiyuan 030051China School of Materials Science and Engineering North University of ChinaTaiyuan 030051China

The combination of new intelligent materials and structure technology is becoming an effective way in energy havesting and self-powered sensing. In this work, we demonstrate a magnetically levitated/piezoelectric/triboelectric hybrid generator, which does not use complex structure and has high steady output performance. It includes three parts: magnetically levitated generator(MLG), piezoelectric generator(PNG), triboelectric nanogenerator(TENG). The peak power of each is 135 μW, 22 mW and3.6 mW, which are obtained at 1 MΩ, 10 kΩ and 1 kΩ, respectively. The hybrid generator can completely light up light-emitting diodes(LEDs) under the vibration frequency of 20 Hz and the vibration amplitude of 10 mm. It also can charge a 470 μF *** this basis, we have integrated the hybrid generaor as a power supply into a self-powered tempreature sensing system. The combination of three generators can not only broaden the operating range, but also increase the operating length and *** work will extend the application of self-powered sensor in automatic production line and promote the development of industrial control technology.

关键词： triboelectric nanogenerator piezoelectric magnetically levitated generator energy harvesting self-powered sensing

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