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Research on human gait sensing based on triboelectric nanogenerator

Nanotechnology and Precision Engineering 2024年第2期7卷 32-40页

作者： Gang Yang Lifang Wang Jiayun Tian School of Communication and Information Engineering Xi’an University of Posts and TelecommunicationsXi’an 710121China

To address the problem of frequent battery replacement for wearable sensors applied to fall detection among the elderly,a portable and lowcost triboelectric nanogenerator(TENG)-based self-powered sensor for human gait monitoring is *** main fabrication materials of the TENG are polytetrafluoroethylene(PTFE)film,aluminum(Al)foil,and polyimide(PI)film,where PTFE and Al are the friction layer materials and the PI film is used to improve the output *** the ability of TENGs to monitor changes in environmental conditions,a self-powered sensor based on the TENG is placed in an insole to collect gait *** a TENG does not require a power source to convert physical and mechanical signals into electrical signals,the electrical signals can be used as sensing signals to be analyzed by a computer to recognize daily human activities and fall *** results show that the accuracy of the TENG-based sensor for recognizing human gait is 97.2%,demonstrating superior sensing performance and providing valuable insights for future monitoring of fall events in the elderly population.

关键词： Triboelectric nanogenerator Sensor gait monitoring

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Washable and Multifunctional Electronic Textiles Via In Situ Lamination for Personal Health Care

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Advanced Fiber Materials 2024年第2期6卷 458-472页

作者： Xinghua Hong Wei Sun Songlin Zhang Zhaogang Tang Mengjuan Zhou Shuai Guo Xingkui Guo Weili Zhao Xiaolin Wang Haiming Chen Ziquan Zhang Dongsheng Mao Chaobin He Swee Ching Tan College of Textiles(International Silk Institute) Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang ProvinceZhejiang Sci-Tech UniversityHangzhou 310018China Department of Materials Science and Engineering National University of SingaporeSingapore 117575Singapore Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Key Laboratory of Bio‑Based Polymeric Materials Technology and Application of Zhejiang Province Laboratory of Polymers and CompositesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China BCA Academy Singapore 579700Singapore Institute of Materials Research and Engineering Singapore 138634Singapore

Limitations of current electronic textiles(e-textiles),including poor washability,instability,and inferior sensing capability,are concerns hindering their broad and practical applications in personal health care management,virtual games,sports,and ***,we report an RGO/PANI e-textile via alternative coatings of in situ reduced graphene oxides(RGO)and in situ polymerized polyaniline(PANI),establishing a laminated structure on a knitted textile *** a result of an in situ lamination strategy,our e-textile exhibits excellent breathability(1428 mm s^(-1),greater than that of bare cotton fabric)and outstanding sensitivity(gage factor of 39.7)over a wide strain range(~0.0625–200%).Importantly,we observed exceptional sensing durability even after severe mechanical disturbance of stretching,bending,or twisting(>1500 cycles)and daily machine *** analysis revealed that our proposed in situ lamination approach enabled the physical and chemical interactions between sensing active materials and the textile ***,the electromechanical behavior of our RGO/PANI e-textile was thoroughly analyzed based on an equivalent electrical circuit,which agreed well with the experi-mental *** applications of the e-textile were demonstrated for personal health care management,including body motion monitoring,emotional sensing,and flatfoot gait *** RGO/PANI e-textile presented in this study holds significant implications for the evolution of health care applications utilizing smart e-textiles.

关键词： Reduced graphene oxide(RGO) Polyaniline(PANI) In situ lamination Washable e-textile gait monitoring

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