Superelastic, Sensitive, and Low Hysteresis Flexible Strain Sensor Based on Wave-Patterned Liquid Metal for Human Activity Monitoring

2020 ◽  
Vol 12 (19) ◽  
pp. 22200-22211 ◽  
Author(s):  
Jing Chen ◽  
Jinjie Zhang ◽  
Zebang Luo ◽  
Jinyong Zhang ◽  
Lin Li ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Human Activity ◽  
Strain Sensor ◽  
Activity Monitoring ◽  
Flexible Strain Sensor

Highly stretchable liquid-metal based strain sensor with high sensitivity for human activity monitoring

2021 ◽  
pp. 131277
Author(s):  
Shawn L. Wang ◽  
Xinwei Xu ◽  
Zhubing Han ◽  
He Li ◽  
Qing Wang ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Human Activity ◽  
Strain Sensor ◽  
High Sensitivity ◽  
Activity Monitoring ◽  
Highly Stretchable

scholarly journals Structural Reinforcement Effect of a Flexible Strain Sensor Integrated with Pneumatic Balloon Actuators for Soft Microrobot Fingers

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 395
Author(s):  
Satoshi Konishi ◽  
Fuminari Mori ◽  
Ayano Shimizu ◽  
Akiya Hirata
Keyword(s):  
Liquid Metal ◽  
Strain Sensor ◽  
Strain Sensors ◽  
Original Performance ◽  
Sensors And Actuators ◽  
Parylene C ◽  
Structural Reinforcement ◽  
Effective Combination ◽  
Metal Strain ◽  
Flexible Strain Sensor

Motion capture of a robot and tactile sensing for a robot require sensors. Strain sensors are used to detect bending deformation of the robot finger and to sense the force from an object. It is important to introduce sensors in effective combination with actuators without affecting the original performance of the robot. We are interested in the improvement of flexible strain sensors integrated into soft microrobot fingers using a pneumatic balloon actuator (PBA). A strain sensor using a microchannel filled with liquid metal was developed for soft PBAs by considering the compatibility of sensors and actuators. Inflatable deformation generated by PBAs, however, was found to affect sensor characteristics. This paper presents structural reinforcement of a liquid metal-based sensor to solve this problem. Parylene C film was deposited into a microchannel to reinforce its structure against the inflatable deformation caused by a PBA. Parylene C deposition into a microchannel suppressed the interference of inflatable deformation. The proposed method enables the effective combination of soft PBAs and a flexible liquid metal strain sensor for use in microrobot fingers.

Flexible Strain Sensor Using Additive Manufacturing and Conductive Liquid Metal: Design, Fabrication, and Characterization

2018 ◽  
Author(s):  
Austin Smith ◽  
Hamzeh Bardaweel
Keyword(s):  
3D Printing ◽  
Liquid Metal ◽  
Strain Sensor ◽  
Gauge Factor ◽  
Limiting Factor ◽  
Successful Implementation ◽  
Conductive Liquid ◽  
Fused Deposition ◽  
3D Printed ◽  
Flexible Strain Sensor

In this work a flexible strain sensor is fabricated using Fused Deposition Modeling (FDM) 3D printing technique. The strain sensor is fabricated using commercially available flexible Thermoplastic Polyurethane (TPU) filaments and liquid metal Galinstan Ga 68.5% In 21% Sn 10%. The strain sensor consists of U-shape 2.34mm long and 0.2mm deep channels embedded inside a TPU 3D printed structure. The performance of the strain sensor is measured experimentally. Gauge Factor is estimated by measuring change in electric resistance when the sensor is subject to 13.2% – 38.6% strain. Upon straining and unstraining, results from characterization tests show high linearity in the range of 13.2% to 38.6% strain with very little hysteresis. However, changes due to permanent deformations are a limiting factor in the usefulness of these sensors because these changes limit the consistency of the device. FDM 3D printing shows promise as a method for fabricating flexible strain sensors. However, more investigation is needed to look at the effects of geometries and 3D printing process parameters on the yield elongation of the flexible filaments. Additionally, more investigation is needed to observe the effect of distorted dimensions of the 3D printed channels on the sensitivity of the strain sensor. It is anticipated that successful implementation of these commercially available filaments and FDM 3D printers will lead to reduction in cost and complexity of developing these flexible sensors.

A stretchable and self-healable organosilicon conductive nanocomposite for a reliable and sensitive strain sensor

2020 ◽  
Vol 8 (48) ◽  
pp. 17277-17288
Author(s):  
Kaiming Zhang ◽  
Chengxin Song ◽  
Zhe Wang ◽  
Chuanhui Gao ◽  
Yumin Wu ◽  
...  
Keyword(s):  
Human Activity ◽  
Electronic Devices ◽  
Strain Sensor ◽  
Activity Monitoring ◽  
Strain Sensors ◽  
Sensitive Strain ◽  
Soft Robots ◽  
Conductive Nanocomposites

Stretchable conductive nanocomposites can be further used as strain sensors, which are extensively applied in bionic electronic devices, human activity monitoring and soft robots.

scholarly journals Carbonized Chinese Art Paper-Based High-Performance Wearable Strain Sensor for Human Activity Monitoring

2019 ◽  
Vol 1 (11) ◽  
pp. 2415-2421 ◽  
Author(s):  
Kailun Xia ◽  
Xianyu Chen ◽  
Xinyi Shen ◽  
Shuo Li ◽  
Zhe Yin ◽  
...  
Keyword(s):  
Human Activity ◽  
High Performance ◽  
Strain Sensor ◽  
Activity Monitoring ◽  
Chinese Art

Carbonized silk georgette as an ultrasensitive wearable strain sensor for full-range human activity monitoring

2017 ◽  
Vol 5 (30) ◽  
pp. 7604-7611 ◽  
Author(s):  
Chunya Wang ◽  
Kailun Xia ◽  
Muqiang Jian ◽  
Huimin Wang ◽  
Mingchao Zhang ◽  
...  
Keyword(s):  
Human Activity ◽  
Full Range ◽  
Strain Sensor ◽  
Activity Monitoring ◽  
Strain Sensors ◽  
Human Motions

Silk georgette based wearable strain sensors are developed, which exhibit outstanding performance and great potential in monitoring full-range human motions.

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