A flexible, adhesive and self-healable hydrogel-based wearable strain sensor for human motion and physiological signal monitoring

2019 ◽  
Vol 7 (30) ◽  
pp. 4638-4648 ◽  
Author(s):  
Shan Xia ◽  
Shixin Song ◽  
Fei Jia ◽  
Guanghui Gao
Keyword(s):  
Strain Sensor ◽  
Human Motion ◽  
Joint Motion ◽  
Wearable Sensor ◽  
Physiological Signal ◽  
Signal Monitoring ◽  
Human Motions

A flexible and wearable sensor is prepared to monitor human motions such as joint motion, speaking, breathing, and slight blood pulsation.

A transparent, stretchable, stable, self-adhesive ionogel-based strain sensor for human motion monitoring

2019 ◽  
Vol 7 (36) ◽  
pp. 11244-11250 ◽  
Author(s):  
Jingxian Sun ◽  
Yixin Yuan ◽  
Guoqiang Lu ◽  
Lingfeng Li ◽  
Xiaoqun Zhu ◽  
...  
Keyword(s):  
Strain Sensor ◽  
Human Motion ◽  
Human Motion Monitoring ◽  
Human Motions

A multi-functional ionogel-based strain sensor was synthesized to detect various human motions.

A multifunctional wearable sensor based on a graphene/inverse opal cellulose film for simultaneous, in situ monitoring of human motion and sweat

Nanoscale ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 2090-2098 ◽  
Author(s):  
Hua Xu ◽  
Yi Fei Lu ◽  
Jian Xin Xiang ◽  
Ming Kun Zhang ◽  
Yuan Jin Zhao ◽  
...  
Keyword(s):  
Human Motion ◽  
In Situ Monitoring ◽  
Inverse Opal ◽  
Wearable Sensor ◽  
Cellulose Film ◽  
Human Motions

A multifunctional, wearable sensor based on a rGO/IOAC film has been developed and can perform simultaneous monitoring of human motions and sweat.

Fibrous strain sensor with ultra-sensitivity, wide sensing range, and large linearity for full-range detection of human motion

Nanoscale ◽  
2018 ◽  
Vol 10 (37) ◽  
pp. 17512-17519 ◽  
Author(s):  
Hanguang Wu ◽  
Qiang Liu ◽  
Hongwu Chen ◽  
Gaoquan Shi ◽  
Chun Li
Keyword(s):  
Full Range ◽  
Strain Sensor ◽  
Human Motion ◽  
Good Linearity ◽  
Sensing Range ◽  
Comprehensive Properties ◽  
Human Motions ◽  
Excellent Stability

The FPC strain sensor exhibits superior comprehensive properties integrating extraordinary sensitivity, wide sensing range, low hysteresis, good linearity, and excellent stability. It can detect full-range human motions.

scholarly journals Preparing Polypyrrole-Coated Stretchable Textile via Low-Temperature Interfacial Polymerization for Highly Sensitive Strain Sensor

Micromachines ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 788 ◽  
Author(s):  
Chen ◽  
Li ◽  
Qiao ◽  
Lu
Keyword(s):  
Low Temperature ◽  
Real Time ◽  
Dynamic Range ◽  
Interfacial Polymerization ◽  
Strain Sensor ◽  
Human Motion ◽  
Gauge Factor ◽  
Infrared Spectrometry ◽  
Highly Sensitive ◽  
Human Motions

The stretchable sensor has been considered as the most important component in a wearable device. However, it is still a great challenge to develop a highly sensitive textile-based strain sensor with good flexibility, excellent skin affinity, and large dynamic range. Herein, polypyrrole (PPy) was immobilized on a stretchable textile knitted by polyester and spandex via low-temperature interfacial polymerization to prepare a conductive strain sensor for human motion and respiration measurements. Scanning electron microscopy, Fourier transform infrared spectrometry, and thermal gravimetric data verify that a thin layer of PPy has been successfully coated on the textile with a high density and very uniform distribution. The resistance of the as-prepared textile is 21.25 Ω/cm2 and the PPy-coated textile could be used as an electric conductor to light up a LED lamp. Moreover, the textile could tolerate folding at an angle of 180° and 500 times of bending-twisting cycles without significant changes on its resistance. A negative correlation between the resistance change and the applied strain is observed for the textile-based sensor in the strain ranging from 0 to 71% with the gauge factor of −0.46. After more than 200 cycles of stretching-releasing under the strain of 26%, there is no obvious alteration on the sensing responses. The sensors were attached on volunteers’ body or clothes for the real-time measurement of human motions and respiration, demonstrating that the textile-based sensor could sensitively detect finger, elbow, and knee bending and differentiate deep, normal, and fast breath. This work may provide an approach to uniform and dense coating conductive polymers on textiles for highly sensitive and stretchable sensors, which possess great potentials in practical applications for real-time monitoring human motions and physiological signs.

scholarly journals Flexible Metal/Polymer Composite Films Embedded with Silver Nanowires as a Stretchable and Conductive Strain Sensor for Human Motion Monitoring

Micromachines ◽  
2019 ◽  
Vol 10 (6) ◽  
pp. 372 ◽  
Author(s):  
Jinjin Luan ◽  
Qing Wang ◽  
Xu Zheng ◽  
Yao Li ◽  
Ning Wang
Keyword(s):  
Polymer Composite ◽  
Silver Nanowires ◽  
Composite Films ◽  
Strain Sensor ◽  
High Sensitivity ◽  
Human Motion ◽  
Applied Strain ◽  
Potential Candidate ◽  
Flexible Metal ◽  
Metal Polymer

To avoid conductive failure due to the cracks of the metal thin film under external loads for the wearable strain sensor, a stretchable metal/polymer composite film embedded with silver nanowires (AgNWs) was examined as a potential candidate. The combination of Ag film and AgNWs enabled the fabrication of a conductive film that was applied as a high sensitivity strain sensor, with gauge factors of 7.1 under the applied strain of 0–10% and 21.1 under the applied strain of 10–30%. Furthermore, the strain sensor was demonstrated to be highly reversible and remained stable after 1000 bending cycles. These results indicated that the AgNWs could act as elastic conductive bridges across cracks in the metal film to maintain high conductivity under tensile and bending loads. As such, the strain sensor engineered herein was successfully applied in the real-time detection and monitoring of large motions of joints and subtle motions of the mouth.

Cellulose nanocrystalline hydrogel based on a choline chloride deep eutectic solvent as wearable strain sensor for human motion

2021 ◽  
Vol 255 ◽  
pp. 117443
Author(s):  
Huiqiang Wang ◽  
Jiachen Li ◽  
Xin Yu ◽  
Guihua Yan ◽  
Xing Tang ◽  
...  
Keyword(s):  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Strain Sensor ◽  
Human Motion

scholarly journals Flexible and wearable strain sensor based on electrospun carbon sponge/polydimethylsiloxane composite for human motion detection

RSC Advances ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 4186-4193
Author(s):  
He Gong ◽  
Chuan Cai ◽  
Hongjun Gu ◽  
Qiushi Jiang ◽  
Daming Zhang ◽  
...  
Keyword(s):  
Motion Detection ◽  
Strain Sensor ◽  
Human Motion ◽  
Gauge Factor ◽  
Human Motion Detection ◽  
Tensile Strains

Electrospun carbon sponge was used to measure tensile strains with a high gauge factor.

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