A graphene-coated silk-spandex fabric strain sensor for human movement monitoring and recognition

Song, Xian; Liu, Xiaoting; Peng, Yuxin; Xu, Zhen; Liu, Wenming; Pang, Kai; Wang, Jianxiang; Liu, Zhong; Yang, Qiang; Meng, Jun

doi:10.1088/1361-6528/abe788

Cited by 36 publications

(36 citation statements)

References 26 publications

(28 reference statements)

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“…In general, strain sensors are made from functional materials integrated into flexible substrates. For resistive sensors, these materials include carbon (carbon nanotubes (CNT) [ 19 ], graphene [ 20 ], carbon black [ 21 ], etc. ), metals (metal particles [ 22 ], nanowires [ 23 ], films [ 24 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Flexible Strain-Sensitive Silicone-CNT Sensor for Human Motion Detection

et al. 2022

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This article describes the manufacturing technology of biocompatible flexible strain-sensitive sensor based on Ecoflex silicone and multi-walled carbon nanotubes (MWCNT). The sensor demonstrates resistive behavior. Structural, electrical, and mechanical characteristics are compared. It is shown that laser radiation significantly reduces the resistance of the material. Through laser radiation, electrically conductive networks of MWCNT are formed in a silicone matrix. The developed sensor demonstrates highly sensitive characteristics: gauge factor at 100% elongation −4.9, gauge factor at 90° bending −0.9%/deg, stretchability up to 725%, tensile strength 0.7 MPa, modulus of elasticity at 100% 46 kPa, and the temperature coefficient of resistance in the range of 30–40 °С is −2 × 10−3. There is a linear sensor response (with 1 ms response time) with a low hysteresis of ≤3%. An electronic unit for reading and processing sensor signals based on the ATXMEGA8E5-AU microcontroller has been developed. The unit was set to operate the sensor in the range of electrical resistance 5–150 kOhm. The Bluetooth module made it possible to transfer the received data to a personal computer. Currently, in the field of wearable technologies and health monitoring, a vital need is the development of flexible sensors attached to the human body to track various indicators. By integrating the sensor with the joints of the human hand, effective movement sensing has been demonstrated.

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Section: Introductionmentioning

confidence: 99%

Flexible Strain-Sensitive Silicone-CNT Sensor for Human Motion Detection

et al. 2022

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“…With this technological advancement, physicians can evaluate the dynamics of disease progression, early health risk prognosis, tailor spersonalisedtherapeutic tools, and in turn, effectively cut the expenses that are encumbering medical care systems globally [13]. There are several techniques that have been explored to monitor motions of the human body, such as strain sensing [14], ultrasound [15], doppler sensor [16], piezoelectricdevices [17], hybrid devices [18], triboelectric nanogenerators [19] etc. However, most of the methods used to date are quite expensive and complex.…”

Section: Introductionmentioning

confidence: 99%

Wearable Human Motion Monitoring Using Vertical Contact Separation Mode Triboelectric Nanogenerator

Kaur

Ying

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Wearable human motion monitoringhas become an integral part of the paradigm shift that is on the horizon in the field of healthcare for a wide variety of biomedical applications. In recent years, there has been incessant advancement in smart wearable technology capable of human motion monitoring ranging from strain sensors to piezoelectrics. This paper proposes to fabricate a Triboelectric Nanogenerator based on Vertical Contact Separation (VCS) mode with design characteristics offlexibility, low cost, simple and easy to fabricate design for real - time monitoring of human body movements. The output performance of fabricated VCS - TENG is analysed by finger tapping. In order to conduct human motion monitoring, VCS - TENG is affixed on different body parts, and the corresponding signal is analysed. The developed prototype can be further integrated with advanced electronics to deliver promising technology in the field of healthcare diagnostics and monitoring.

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“…Many works have also been carried out, such as silk spandex fabric strain sensor by coating reduced graphene oxide in which performance was measured by performing a cyclic test which remained constant for 1000 cycles [ 29 ]. Even some interesting work in gait monitoring has also been reported, where the knee region was monitored by two identical sensors made out of graphene [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Smart Graphene Nanoplatelet Strain Sensor for Natural Frequency Sensing of Stainless Steel (SS304) and Human Health Monitoring

Sethy

Balasubramaniam

2022

Materials

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The main purpose of this article is to monitor the natural frequency of stainless steel (SS304) with and without defect by spray-coated smart graphene nanoplatelet (GNPs)-doped poly (methyl methacrylate) (PMMA) nanocomposite strain sensor and human health by smart Lycra denim textile sensor. Methods such as impact hammer test and NI-daq, finite element method (FEM) simulation by abacus 6.12, and fast Fourier transform (FFT) study were applied for frequency monitoring of SS304. For human health monitoring, edema disease inspection, cough, and biceps locomotion were studied by graphene sol–gel textile sensor. We report eight sensors fabricated by scotch tape exfoliation method and their sensitivity was checked in terms of gauge factor (GF). The highest and lowest GF-based sensors were checked for sensitivity in the defect (hole) specimen. These sensors were used to sense the natural frequency of SS304 at three different positions in the cantilever beam. The same quantity of GNPs was used for making Lycra denim textile sensors for human health monitoring. The Lycra denim textile sensor showed a 216% change in resistance in the left calf muscle, which is less than right leg flexibility, indicating good sensitivity. In addition, the textile sensor helped in sensing coughing and biceps monitoring. The ease in fabrication and high sensitivity demonstrate the potential ability of GNPs for futuristic smart material for structural and human health monitoring.

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A graphene-coated silk-spandex fabric strain sensor for human movement monitoring and recognition

Cited by 36 publications

References 26 publications

Flexible Strain-Sensitive Silicone-CNT Sensor for Human Motion Detection

Flexible Strain-Sensitive Silicone-CNT Sensor for Human Motion Detection

Wearable Human Motion Monitoring Using Vertical Contact Separation Mode Triboelectric Nanogenerator

Smart Graphene Nanoplatelet Strain Sensor for Natural Frequency Sensing of Stainless Steel (SS304) and Human Health Monitoring

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