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Miniaturization of mechanical actuators in skin-integrated electronics for haptic interfaces

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Microsystems & Nanoengineering 2021年第5期7卷 31-39页

作者： Dengfeng Li Jiahui He Zhen Song Kuanming Yao Mengge Wu Haoran Fu Yiming Liu Zhan Gao jingkun zhou Lei Wei Zhengyou Zhang Yuan Dai Zhaoqian Xie Xinge Yu Department of Biomedical Engineering City University of Hong KongHong Kong SARChina Hong Kong Centre for Cerebro-Cardiovascular Health Engineering(COCHE) Hong Kong SARChina State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering MechanicsDalian University of TechnologyDalianChina lnstitute of Flexible Electronic Technology of Tsinghua JiaxingChina Tencent Robotics X ShenzhenChina Ningbo Institute of Dalian University of Technology NingboChina

Skin-integrated electronics,also known as electronic skin(e-skin);are rapidly developing and are gradually being adopted in biomedical fields as well as in our daily lives.E-skin capable of providing sensitive and high-resolution tactile sensations and haptic feedback to the human body would open a new e-skin paradigm for closed-loop human-machine ***,we report a class of materials and mechanical designs for the miniaturization of mechanical actuators and strategies for their integration into thin,soft e-skin for haptic *** mechanical actuators exhibit small dimensions of 5 mm diameter and 1.45 mm thickness and work in an electromagnetically driven vibrotactile mode with resonance frequency overlapping the most sensitive frequency of human *** mini actuators can be integrated simultaneously in a small area of 2 cm×2 cm to form a 3×3 haptic feedback array,which is small and compact enough to mount on a thumb ***,the thin,soft haptic interface exhibits good mechanical properties that work properly during stretching,bending,and twisting and therefore can conformally fit onto various parts of the human body to afford programmable tactile enhancement and Braille recognition with an accuracy rate over 85%.

关键词： stretching properly mount

从城市发展水平与年均降雨量的关系探究我国雾霾污染问题研究-基于2013年73个主要城市截面数据的分析

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干旱区资源与环境 2017年第8期31卷 94-100页

作者：周景坤浙江大学中国非公有制经济人士统战研究基地杭州310058

文中基于2013年73个主要城市的截面数据,采用因子分析对城市发展水平进行了测量,采用相关分析探讨了城市发展水平与空气质量的关系,采用对比分析研究了不同年均降雨量下城市发展水平与空气质量的关系。研究发现:城市年均降雨极强的城市... 详细信息

文中基于2013年73个主要城市的截面数据,采用因子分析对城市发展水平进行了测量,采用相关分析探讨了城市发展水平与空气质量的关系,采用对比分析研究了不同年均降雨量下城市发展水平与空气质量的关系。研究发现:城市年均降雨极强的城市,不管其城市发展速度如何,城市空气质量都很好,极少有雾霾天气出现;城市年均降雨强度极低的城市,如果其城市发展速度较快,那么其空气质量非常不好,雾霾污染特别严重;城市年均降雨强度极低的城市,如果其城市发展速度不快和那些城市年均降雨强度一般的城市,不管其城市发展速度如何,城市空气质量的好坏与其高污染产业密集程度,煤炭使用量的多少、汽车拥有的数量和强度等因素密切相关。最后给出了我国应该加大城市空气污染自净能力研究的力度,科学划分出我国主要城市空气污染自净能力等级,并根据城市等级的不同有效控制其发展速度,规模,特别是其高污染产业如何发展等对策建议。

关键词：大气环境管理雾霾污染因子分析雾霾防治城市

Stretchable,skin-conformable neuromorphic system for tactile sensory recognizing and encoding

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InfoMat 2023年第12期5卷 87-99页

作者： Mengge Wu Qiuna Zhuang Kuanming Yao Jian Li Guangyao Zhao jingkun zhou Dengfeng Li Rui Shi Guoqiang Xu Yingchun Li Zijian Zheng Zhihui Yang Junsheng Yu Xinge Yu State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China(UESTC)Chengduthe People's Republic of China Department of Biomedical Engineering City University of Hong KongHong Kongthe People's Republic of China Laboratory for Advanced Interfacial Materials and Devices School of Fashion and TextilesThe Hong Kong Polytechnic UniversityHong Kongthe People's Republic of China Hong Kong Center for Cerebra-Cardiovascular Health Engineering Hong Kong Science ParkHong Kongthe People's Republic of China College of Science Harbin Institute of TechnologyShenzhenthe People's Republic of China Department of Pathology The Affiliated Hospital of Southwest Medical UniversityLuzhouthe People's Republic of China

Expanding wearable technologies to artificial tactile perception will be of significance for intelligent human-machine interface,as neuromorphic sensing devices are promising candidates due to their low energy consumption and highly effective operating ***-compatible and conformable features are required for the purpose of realizing wearable artificial tactile ***,we report an intrinsically stretchable,skin-integrated neuromorphic system with triboelectric nanogenerators as tactile sensing and organic electrochemical transistors as information *** integrated system provides desired sensing,synaptic,and mechanical characteristics,such as sensitive response(~0.04 kPa^(-1))to low-pressure,short-and long-term synaptic plasticity,great switching endurance(>10000 pulses),symmetric weight update,together with high stretchability of 100%*** neural encoding,demonstrations are capable of recognizing,extracting,and encoding features of tactile *** work provides a feasible approach to wearable,skin-conformable neuromorphic sensing system with great application prospects in intelligent robotics and replacement prosthetics.

关键词： neural encoding neuromorphic sensing system organic electrochemical transistors tactile sensation triboelectric nanogenerators

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中国雾霾防治的政策创新

科技管理研究 2016年第11期36卷 205-210页

作者：周景坤浙江大学∥中国非公有制经济人士统战研究基地浙江杭州310058

改革开放30多年来,中国经济得到了快速发展,但随之而来的是生态环境的不断恶化,特别是近年来雾霾污染的危害日趋严重。通过文献资料分析和比较研究等方法,划分出雾霾防治政策的类型和中国雾霾防治政策的萌芽、起步、发展及完善等几个发... 详细信息

改革开放30多年来,中国经济得到了快速发展,但随之而来的是生态环境的不断恶化,特别是近年来雾霾污染的危害日趋严重。通过文献资料分析和比较研究等方法,划分出雾霾防治政策的类型和中国雾霾防治政策的萌芽、起步、发展及完善等几个发展演进阶段;指出如何创新中国雾霾防治政策的几点思考,以期为中国雾霾防治政策的优化与完善提供借鉴。

关键词：雾霾防治政策创新发展阶段

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基于消费者需求视角的创新机会挖掘研究

科技管理研究 2015年第23期35卷 20-24页

作者：周景坤北京师范大学北京100875

从消费者需求视角出发,以从顾客角度重新定义顾客价值链为出发点,探讨挖掘创新机会的基本方法,提出企业成功进行产品或技术创新的一些基本策略,并结合具体实例对这些策略进行适度验证。旨在帮助企业提升创新能力,增强市场竞争力。

关键词：消费者需求创新机会顾客价值链

Soft,body conformable electronics for thermoregulation enabled by kirigami

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Bio-Design and Manufacturing 2024年第4期7卷 453-462页

作者： Lung Chow Guangyao Zhao Pengcheng Wu Xingcan Huang Jiyu Li Jian Li Wanying Wang Guihuan Guo Zhiyuan Li Jiachen Wang jingkun zhou Yawen Yang Yuyu Gao Binbin Zhang Qiang Zhang Dengfeng Li Ya Huang Kuanming Yao Jian Lu Xinge Yu Department of Biomedical Engineering City University of Hong KongHong Kong 999077China Hong Kong Centre for Cerebro-Cardiovascular Health Engineering Hong Kong 999077China Department of Biomedical Sciences City University of Hong KongHong Kong 999077China Department of Mechanical Engineering City University of Hong KongHong Kong 999077China

The application of thermoelectric devices(TEDs)for personalized thermoregulation is attractive for saving energy while balancing the quality of *** that directly attach to human skin remarkably minimized the energy wasted for cooling the entire ***,facing the extreme dynamic geometry change and strain of human skin,conventional TEDs cannot align with the contour of our bodies for the best thermoregulation ***,we designed a kirigami-based wearable TED with excellent water vapor permeability,flexibility,and *** analysis and experimental results reveal that our product can withstand various types of large mechanical deformation without circuit *** stated outcome and proposed facile approach not only reinforce the development of wearable TEDs but also offer an innovative opportunity for different electronics that require high conformability.

关键词： Thermoregulation Thermoelectric Kirigami Body conformable Wearable

Thin,soft,3D printing enabled crosstalk minimized triboelectric nanogenerator arrays for tactile sensing

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Fundamental Research 2023年第1期3卷 111-117页

作者： Jian Li Yiming Liu Mengge Wu Kuanming Yao Zhan Gao Yuyu Gao Xingcan Huang Tsz Hung Wong jingkun zhou Dengfeng Li Hu Li Jiyu Li Ya Huang Rui Shi Junsheng Yu Xinge Yu Department of Biomedical Engineering City University of Hong KongHong Kong 999077China Hong Kong Center forCerebra-Cardiovascular Health Engineering Hong Kong Science ParkNew TerritoriesHong KongChina State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China(UESTC)Chengdu 610054China Shenzhen Research Institute City University of Hong Kong Shenzhen 518057China

With the requirements of self-powering sensors in flexible electronics,wearable triboelectric nanogenerators(TENGs)have attracted great attention due to their advantages of excellent electrical outputs and low-cost processing *** crosstalk effect between adjacent sensing units in TENGs significantly limits the pixel density of sensor ***,we present a skin-integrated,flexible TENG sensor array with 100 sensing units in an overall size of 7.5 cm×7.5 cm that can be processed in a simple,low-cost,and scalable way enabled by 3D *** the sensing units show good sensitivity of 0.11 V/kPa with a wide range of pressure detection from 10 to 65 kPa,which allows to accurately distinguish various tactile formats from gentle touching(as low as 2 kPa)to hard *** 3D printing patterned substrate allows to cast triboelectric layers of polydimethylsiloxane in an independent sensing manner for each unit,which greatly suppresses the cross talk arising from adjacent sensing units,where the maximum crosstalk output is only 10.8%.The excellent uniformity and reproducibility of the sensor array offer precise pressure mapping for complicated pattern loadings,which demonstrates its potential in tactile sensing and human-machine interfaces.

关键词： Tactile sensor Triboelectricnanogenerators Self-powering sensors Crosstalk suppression Human-machine interfaces

Soft,stretchable,wireless intelligent three-lead electrocardiograph monitors with feedback functions for warning of potential heart attack

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SmartMat 2022年第4期3卷 668-684页

作者： Chunki Yiu Yiming Liu Chao Zhang jingkun zhou Huiling Jia Tsz H.Wong Xingcan Huang Jian Li Kuanming Yao Ming K.Yau Ling Zhao Hu Li Binbin Zhang Wooyoung Park Yuanting Zhang Zuankai Wang Xinge Yu Department of Biomedical Engineering City University of Hong KongHong KongChina Hong Kong Center for Cerebra-Cardiovascular Health Engineering Hong KongChina Department of Mechanical Engineering City University of Hong KongHong KongChina

Cardiovascular diseases(CVDs)are fatal chronic diseases,where electrocardiography(ECG)monitoring could be a prominent solution for early *** spite of available commercialized,multilead ECG devices,bulky formats,discontinuous monitoring,and no safety alarm system significantly limit their practical ***,we present a soft,and stretchable,three-lead ECG device allowing continuous monitoring and wireless transmission of ECG signals.A newly developed organohydrogel patch with a strong adhesive ability(~9.9 kPa)and higher conductivity(~6.5 kΩ)is applied for high-quality ECG signals *** a long operation duration(6.5 h)and wireless transmission distance(20.9 m),it could fulfill most of the daily *** learning algorithms and the graphical user interface are used for real-time ECG monitoring and cardiac abnormalities *** vibratory flexible actuator,which is triggered by cardiac abnormalities that need immediate medical treatment,is also integrated as a warning system for the *** a newly reported stretchable multi-lead ECG device for long-term ECG signal monitoring,there is a high potential for improving users'life quality with the high-risk population of CVDs.

关键词： 3-lead electrocardiograph safety alarm system skin electronics stretchable electronics wireless charging and communication

Garment embedded sweat-activated batteries in wearable electronics for continuous sweat monitoring

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npj Flexible Electronics 2022年第1期6卷 107-114页

作者： Xingcan Huang Yiming Liu jingkun zhou Sina Khazaee Nejad Tsz Hung Wong Ya Huang Hu Li Chun Ki Yiu Wooyoung Park Jian Li Jingyou Su Ling Zhao Kuanming Yao Mengge Wu Zhan Gao Dengfeng Li Jiyu Li Rui Shi Xinge Yu Department of Biomedical Engineering City University of Hong KongHong Kong 999077China Hong Kong Center for Cerebra-Cardiovascular Health Engineering Hong Kong Science ParkNew TerritoriesHong KongChina

Thin,soft,and skin-integrated electronic system has great advantages for realizing continuous human healthcare ***,we report an ultra-thin,flexible,and garment-based microelectronics powered by sweat-activated batteries(SABs)and applications of powering biosensors and microelectronic systems for real time sweat *** SAB cell is ultra-thin(1.25 mm)with excellent *** SAB has good electricity output with high capacity(14.33 mAh)and maximum power density(3.17 mW cm^(−2))after being activated by the sweat volume of 0.045 mL cm^(−2),which could continuously power 120 light emitting diodes over 3 *** outputs could maintain stable after repeatable *** microelectronics system could be continuously powered by the SABs for 3 h to monitor sweat and physiological information,including sweat Na+concentration,pH,and skin *** reported integrated system provides a potential for solving the power issues of flexible wearable electronics and realizing personalized medicine.

关键词： continuously system maintain