scholarly journals A Transparent Strain Sensor Based on PDMS-Embedded Conductive Fabric for Wearable Sensing Applications

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 71020-71027 ◽  
Author(s):  
Anindya Nag ◽  
Roy B. V. B. Simorangkir ◽  
Elizabeth Valentin ◽  
Toni Bjorninen ◽  
Leena Ukkonen ◽  
...  
Keyword(s):  
Strain Sensor ◽  
Conductive Fabric ◽  
Wearable Sensing ◽  
Sensing Applications

Optimization of 3D Printed Elastomeric Nanocomposites for Flexible Strain Sensing Applications

2019 ◽  
Author(s):  
Mohammad Abshirini ◽  
Mohammad Charara ◽  
Mrinal C. Saha ◽  
M. Cengiz Altan ◽  
Yingtao Liu
Keyword(s):  
3D Printing ◽  
Strain Sensor ◽  
Sensitive Strain ◽  
Curing Temperature ◽  
Gauge Factor ◽  
Strain Sensing ◽  
Sensing Applications ◽  
Wide Range ◽  
Load Rate ◽  
3D Printed

Abstract Flexible and sensitive strain sensors can be utilized as wearable sensors and electronic devices in a wide range of applications, such as personal health monitoring, sports performance, and electronic skin. This paper presents the fabrication of a highly flexible and sensitive strain sensor by 3D printing an electrically conductive polydimethylsiloxane (PDMS)/multi-wall carbon nanotube (MWNT) nanocomposite on a PDMS substrate. To maximize the sensor’s gauge factor, the effects of MWNT concentration on the strain sensing function in nanocomposites are evaluated. Critical 3D printing and curing parameters, such as 3D printing nozzle diameter and nanocomposites curing temperature, are explored to achieve the highest piezoresistive response, showing that utilizing a smaller deposition nozzle size and higher curing temperature can result in a higher gauge factor. The optimized 3D printed nanocomposite sensor’s sensitivity is characterized under cyclic tensile loads at different maximum strains and loading rates. A linear piezoresistive response is observed up to 70% strain with an average gauge factor of 12, pointing to the sensor’s potential as a flexible strain sensor. In addition, the sensing function is almost independent of the applied load rate. The fabricated sensors are attached to a glove and used as a wearable sensor by detecting human finger and wrist motion. The results indicate that this 3D printed functional nanocomposite shows promise in a broad range of applications, including wearable and skin mounted sensors.

Laser-patterned carbon coatings on flexible and optically transparent plastic substrates for advanced biomedical sensing and implant applications

2022 ◽  
Author(s):  
Pratik Joshi ◽  
Parand R. Riley ◽  
Warren Denning ◽  
Shubhangi Shukla ◽  
Nayna Khosla ◽  
...  
Keyword(s):  
Thin Film ◽  
State Of The Art ◽  
Film Properties ◽  
Transparent Plastic ◽  
Carbon Coatings ◽  
Plastic Substrates ◽  
Wearable Sensing ◽  
Biomedical Sensing ◽  
Sensing Applications ◽  
Optically Transparent

Plasma and laser-based processing for tailoring DLC thin film properties for state-of-the-art wearable sensing applications.

scholarly journals Design, development and analysis of a conductive fabric based flexible and stretchable strain sensor

2020 ◽  
Vol 912 ◽  
pp. 022009 ◽  
Author(s):  
Sayantan Pal ◽  
Debadrata Sarkar ◽  
Shibendu S. Roy ◽  
Arijit Paul ◽  
Aman Arora
Keyword(s):  
Strain Sensor ◽  
Design Development ◽  
Conductive Fabric

scholarly journals Surface Acoustic Wave-Based Flexible Piezocomposite Strain Sensor

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1576
Author(s):  
Rishikesh Srinivasaraghavan Govindarajan ◽  
Eduardo Rojas-Nastrucci ◽  
Daewon Kim
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Lead Zirconate Titanate ◽  
Polyvinylidene Fluoride ◽  
Strain Sensor ◽  
Fast Response ◽  
Lead Zirconate ◽  
Saw Sensor ◽  
Sensing Applications ◽  
Wide Range

A surface acoustic wave (SAW), device composed of polymer and ceramic fillers, exhibiting high piezoelectricity and flexibility, has a wide range of sensing applications in the aerospace field. The demand for flexible SAW sensors has been gradually increasing due to their small size, wireless capability, low fabrication cost, and fast response time. This paper discusses the structural, thermal, and electrical properties of the developed sensor, based on different micro- and nano-fillers, such as lead zirconate titanate (PZT), calcium copper titanate (CCTO), and carbon nanotubes (CNTs), along with polyvinylidene fluoride (PVDF) as a polymer matrix. The piezocomposite substrate of the SAW sensor is fabricated using a hot press, while interdigital transducers (IDTs) are deposited through 3D printing. The piezoelectric properties are also enhanced using a non-contact corona poling technique under a high electric field to align the dipoles. Results show that the developed passive strain sensor can measure mechanical strains by examining the frequency shifts of the detected wave signals.

A Robust Orientation Filter for Wearable Sensing Applications

2020 ◽  
Vol 20 (23) ◽  
pp. 14228-14236
Author(s):  
Sumit Majumder ◽  
M. Jamal Deen
Keyword(s):  
Wearable Sensing ◽  
Sensing Applications

Embedded 3D Printing of Highly Flexible Nanocomposites With Piezoresistive Sensing Capabilities

2020 ◽  
Author(s):  
Blake Herren ◽  
Mrinal C. Saha ◽  
M. Cengiz Altan ◽  
Yingtao Liu
Keyword(s):  
3D Printing ◽  
Human Skin ◽  
Strain Sensor ◽  
Strain Range ◽  
High Sensitivity ◽  
Curing Temperature ◽  
Gauge Factor ◽  
Strain Sensing ◽  
Sensing Applications ◽  
Human Joints

Abstract In recent years, highly flexible nanocomposite sensors have been developed for the detection of a variety of human body movements. To precisely detect the bending motions of human joints, the sensors must be able to conform well with the human skin and produce signals that effectively describe the amount of deformation applied to the material during bending. In this paper, a carbon nanotube-based piezoresistive strain sensor is developed via the direct ink writing based embedded 3D printing method. The optimum weight concentration range of carbon nanotubes in the nanocomposite inks, appropriate for embedded 3D printing, is identified. Samples with complex 2D and 3D geometries are printed to demonstrate the manufacturing capabilities of the embedded printing process. The sensitivity of the piezoresistive strain sensor is optimized by determining the ideal nanofiller concentration, curing temperature, and nozzle size to produce the highest gauge factor in a wide strain range. The piezoresistive and mechanical properties of the optimized sensors are fully characterized to verify the suitability for skin-attachable strain sensing applications. The developed sensors have a wide sensing range, high sensitivity, and minimal strain rate dependence. In addition, their low elasticity and high biocompatibility allow them to be comfortably bonded on the human skin.

Pressure Insensitive Strain Sensor with Facile Solution-Based Process for Tactile Sensing Applications

ACS Nano ◽  
2018 ◽  
Vol 12 (8) ◽  
pp. 7546-7553 ◽  
Author(s):  
Jinwon Oh ◽  
Jun Chang Yang ◽  
Jin-Oh Kim ◽  
Hyunkyu Park ◽  
Se Young Kwon ◽  
...  
Keyword(s):  
Strain Sensor ◽  
Tactile Sensing ◽  
Sensing Applications
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