scholarly journals Structure-Property Relationships in Graphene-Based Strain and Pressure Sensors for Potential Artificial Intelligence Applications

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1250 ◽  
Author(s):  
Zewei Luo ◽  
Xiaotong Hu ◽  
Xiyue Tian ◽  
Chen Luo ◽  
Hejun Xu ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Motion Detection ◽  
Flexible Electronics ◽  
Pressure Sensors ◽  
Human Motion ◽  
Structure Property ◽  
Human Machine Interaction ◽  
Structure Property Relationships ◽  
Human Motion Detection ◽  
Potential Applications

Wearable electronic sensing devices are deemed to be a crucial technology of smart personal electronics. Strain and pressure sensors, one of the most popular research directions in recent years, are the key components of smart and flexible electronics. Graphene, as an advanced nanomaterial, exerts pre-eminent characteristics including high electrical conductivity, excellent mechanical properties, and flexibility. The above advantages of graphene provide great potential for applications in mechatronics, robotics, automation, human-machine interaction, etc.: graphene with diverse structures and leverages, strain and pressure sensors with new functionalities. Herein, the recent progress in graphene-based strain and pressure sensors is presented. The sensing materials are classified into four structures including 0D fullerene, 1D fiber, 2D film, and 3D porous structures. Different structures of graphene-based strain and pressure sensors provide various properties and multifunctions in crucial parameters such as sensitivity, linearity, and hysteresis. The recent and potential applications for graphene-based sensors are also discussed, especially in the field of human motion detection. Finally, the perspectives of graphene-based strain and pressure sensors used in human motion detection combined with artificial intelligence are surveyed. Challenges such as the biocompatibility, integration, and additivity of the sensors are discussed as well.

scholarly journals Facile Preparation of Highly Stretchable TPU/Ag Nanowire Strain Sensor with Spring-Like Configuration

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 339
Author(s):  
Wei Pan ◽  
Juan Wang ◽  
Yong-Ping Li ◽  
Xiao-Bo Sun ◽  
Jin-Ping Wang ◽  
...  
Keyword(s):  
Motion Detection ◽  
Flexible Electronics ◽  
Strain Sensor ◽  
Dip Coating ◽  
Human Motion ◽  
Free Standing ◽  
Weight Percentage ◽  
Human Motion Detection ◽  
Ag Nanowires ◽  
Dip Coating Technique

Stretchable nano-fibers have attracted dramatic attention for the utility in wearable and flexible electronics. In the present case, Ag nanowires (AgNWs)-intertwined thermoplastic polyurethanes (TPU) unwoven nano-membrane is fabricated by an electrospinning method and dip coating technique. Then a strain sensor with a spring-like configuration is fabricated by a twisted method. The sensor exhibits superior electrical conductivity up to 3990 S·cm−1 due to the high weight percentage of the Ag nanowires. Additionally, thanks to the free-standing spring-like configuration that consists of uniform neat loops, the strain sensor can detect a superior strain up to 900% at the point the sensor ruptures. On the other hand, the configuration can mostly protect the AgNWs from falling off. Furthermore, major human motion detection, like movement of a human forefinger, and minor human motion detection, such as a wrist pulse, show the possible application of the sensor in the field of flexible electronics.

Coupling piezoelectric and piezoresistive effects in flexible pressure sensors for human motion detection from zero to high frequency

2021 ◽  
Author(s):  
Lijun Lu ◽  
Ning Zhao ◽  
Jingquan Liu ◽  
Bin Yang
Keyword(s):  
Motion Detection ◽  
Human Activities ◽  
High Frequency ◽  
Wearable Sensors ◽  
Pressure Sensors ◽  
Health Condition ◽  
Human Motion ◽  
Human Motion Detection ◽  
Single Mechanism ◽  
Flexible Pressure Sensors

Flexible wearable sensors have received considerable popularity due to the potential application in monitoring human activities and health condition. However, traditional pressure sensors are always relying on single mechanism (such...

A self-powered laminated fabric sensor for human motion detection and heart-rate monitoring based on PPy/Al Schottky contact

2021 ◽  
pp. 109963622110218
Author(s):  
Yuan Yang ◽  
Guangsheng Zhou ◽  
Dezhan Ye ◽  
Zikui Bai ◽  
Zhongmin Deng ◽  
...  
Keyword(s):  
Heart Rate ◽  
Motion Detection ◽  
Schottky Contact ◽  
Pressure Sensors ◽  
Disease Diagnosis ◽  
Human Motion ◽  
Heart Rate Monitoring ◽  
Human Motion Detection ◽  
Coated Fabric ◽  
Self Powered

Continuous real-time human motion and heart-rate monitoring systems can provide vital clinical information for disease diagnosis, preventive healthcare and rehabilitation care. However, it is still a challenge to design wearable pressure/strain sensors with great flexibility and sustainable power for motion detection and physiological signal monitoring. Here, a self-powered laminated fabric sensor based on Schottky contact was successfully fabricated. This laminated fabric sensor was constructed by sandwiching the polypyrrole (PPy)-coated fabric with the Ni-coated fabric and Al plastic film. The electrical outputs under strain were attributed to the single Schottky contact between PPy and Al. This fabric sensor exhibited excellent stability under continuous quick cycling operation and at high relative humidity, which could be adapted to different human body parts for continuous motion detection and heart-rate monitoring. This work is of great significance to demonstrate a promising strategy toward self-powered wearable pressure sensors used for human motion detecting and hear-rate monitoring.

Highly sensitive, foldable and wearable pressure sensor based on MXene-coated airlaid paper for electronic skin

2021 ◽  
Author(s):  
Di-Jie Yao ◽  
Zhenhua Tang ◽  
Li Zhang ◽  
Zhigang Liu ◽  
Qi-Jun Sun ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Motion Detection ◽  
Human Motion ◽  
Wearable Electronics ◽  
Electronic Textiles ◽  
Fabrication Cost ◽  
Human Motion Detection ◽  
Electronic Skin ◽  
Highly Sensitive ◽  
Key Issues

Electronic textiles (E-textile) have been receiving extensive attention in human motion detection, wearable electronics, and artificial intelligence. However, the fabrication cost and methodology are still key issues for the commercialization...

Ultrasensitive and robust two-dimensional indium selenide flexible electronics and sensors for human motion detection

Nano Energy ◽  
2020 ◽  
Vol 76 ◽  
pp. 105020
Author(s):  
Li Chen ◽  
Zhi Gen Yu ◽  
Dan Liang ◽  
Sifan Li ◽  
Wee Chong Tan ◽  
...  
Keyword(s):  
Motion Detection ◽  
Flexible Electronics ◽  
Indium Selenide ◽  
Human Motion ◽  
Two Dimensional ◽  
Human Motion Detection

Development of high-strength, tough, and self-healing carboxymethyl guar gum-based hydrogels for human motion detection

2020 ◽  
Vol 8 (3) ◽  
pp. 900-908 ◽  
Author(s):  
Wei Chen ◽  
Yunhao Bu ◽  
Delin Li ◽  
Yuan Liu ◽  
Guangxue Chen ◽  
...  
Keyword(s):  
Motion Detection ◽  
Guar Gum ◽  
High Strength ◽  
Human Motion ◽  
Strain Sensors ◽  
Self Healing ◽  
Human Motion Detection ◽  
Potential Applications

Self-healing hydrogels have attracted intense attention because of their potential applications in ionic strain sensors.

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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