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.

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 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.

Sign in / Sign up

Export Citation Format

Share Document