Wearable Socks with Single Electrode Triboelectric Textile Sensors for Monitoring Footsteps

2021 ◽  
pp. 113316
Author(s):  
Gaffar Hossain ◽  
Mizanur Rahman ◽  
Ishtia Z. Hossain ◽  
Ashaduzzaman Khan
Keyword(s):  
Textile Sensors

scholarly journals Highly Sensitive E-Textile Strain Sensors Enhanced by Geometrical Treatment for Human Monitoring

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2383 ◽  
Author(s):  
Chi Cuong Vu ◽  
Jooyong Kim
Keyword(s):  
Form Factors ◽  
Human Movement ◽  
Fast Response ◽  
Strain Sensors ◽  
Electronic Textiles ◽  
Smart Textiles ◽  
Electronic Manufacturing ◽  
Starting Point ◽  
Textile Sensors ◽  
Manufacturing Techniques

Electronic textiles, also known as smart textiles or smart fabrics, are one of the best form factors that enable electronics to be embedded in them, presenting physical flexibility and sizes that cannot be achieved with other existing electronic manufacturing techniques. As part of smart textiles, e-sensors for human movement monitoring have attracted tremendous interest from researchers in recent years. Although there have been outstanding developments, smart e-textile sensors still present significant challenges in sensitivity, accuracy, durability, and manufacturing efficiency. This study proposes a two-step approach (from structure layers and shape) to actively enhance the performance of e-textile strain sensors and improve manufacturing ability for the industry. Indeed, the fabricated strain sensors based on the silver paste/single-walled carbon nanotube (SWCNT) layers and buffer cutting lines have fast response time, low hysteresis, and are six times more sensitive than SWCNT sensors alone. The e-textile sensors are integrated on a glove for monitoring the angle of finger motions. Interestingly, by attaching the sensor to the skin of the neck, the pharynx motions when speaking, coughing, and swallowing exhibited obvious and consistent signals. This research highlights the effect of the shapes and structures of e-textile strain sensors in the operation of a wearable e-textile system. This work also is intended as a starting point that will shape the standardization of strain fabric sensors in different applications.

scholarly journals A Novel Textile Stitch-Based Strain Sensor for Wearable End Users

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1469 ◽  
Author(s):  
Orathai Tangsirinaruenart ◽  
George Stylios
Keyword(s):  
Mechanical Properties ◽  
Electrical Resistance ◽  
Body Movement ◽  
Strain Sensor ◽  
Strain Sensors ◽  
Gauge Factor ◽  
Heart Monitoring ◽  
Textile Sensors ◽  
Good Repeatability ◽  
The Ideal

This research presents an investigation of novel textile-based strain sensors and evaluates their performance. The electrical resistance and mechanical properties of seven different textile sensors were measured. The sensors are made up of a conductive thread, composed of silver plated nylon 117/17 2-ply, 33 tex and 234/34 4-ply, 92 tex and formed in different stitch structures (304, 406, 506, 605), and sewn directly onto a knit fabric substrate (4.44 tex/2 ply, with 2.22, 4.44 and 7.78 tex spandex and 7.78 tex/2 ply, with 2.22 and 4.44 tex spandex). Analysis of the effects of elongation with respect to resistance indicated the ideal configuration for electrical properties, especially electrical sensitivity and repeatability. The optimum linear working range of the sensor with minimal hysteresis was found, and the sensor’s gauge factor indicated that the sensitivity of the sensor varied significantly with repeating cycles. The electrical resistance of the various stitch structures changed significantly, while the amount of drift remained negligible. Stitch 304 2-ply was found to be the most suitable for strain movement. This sensor has a wide working range, well past 50%, and linearity (R2 is 0.984), low hysteresis (6.25% ΔR), good gauge factor (1.61), and baseline resistance (125 Ω), as well as good repeatability (drift in R2 is −0.0073). The stitch-based sensor developed in this research is expected to find applications in garments as wearables for physiological wellbeing monitoring such as body movement, heart monitoring, and limb articulation measurement.

Metal-Textile Hybrid Carrier Modules with Integrated Functions Based on Textile Sensors

2017 ◽  
pp. 175-187
Author(s):  
Enrico Putzke ◽  
Andreas Müller ◽  
André Riedel
Keyword(s):  
Textile Sensors

Smart Jacket Design for Improving Comfort of Neonatal Monitoring

2012 ◽  
pp. 361-385
Author(s):  
Wei Chen ◽  
Sibrecht Bouwstra
Keyword(s):  
Premature Infants ◽  
Neonatal Intensive Care ◽  
Functional Performance ◽  
Patient Comfort ◽  
Design Work ◽  
Premature Babies ◽  
Textile Sensors ◽  
Neonatal Monitoring

Health monitoring is crucial for the survival of ill and premature infants admitted at the neonatal intensive care unit (NICU) in a hospital. The reliability and comfort of monitoring systems will impact on the quality of life and long-term health prospects of the neonates. This chapter presents the ongoing design work of a smart jacket for improving comfort of neonatal monitoring. Textile sensors, a reflectance pulse oximeter, and a wearable temperature sensor are developed to be embedded into the smart jacket. The authors also report a power supply and wireless communication system developed for the smart jacket. Sensor locations, materials, and appearance are designed to optimize the functionality, patient comfort and the possibilities for aesthetic features. Prototypes are presented for demonstrating the design concept, and experimental results for functional performance are shown from the tests on premature babies at the NICU of Máxima Medical Centre (MMC) in Veldhoven, the Netherlands.

scholarly journals Fabrication of Colorimetric Textile Sensor Based on Rhodamine Dye for Acidic Gas Detection

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 431 ◽  
Author(s):  
Young Ki Park ◽  
Byeong M. Oh ◽  
A Ra Jo ◽  
Ji Hyeon Han ◽  
Jee Young Lim ◽  
...  
Keyword(s):  
Reaction Rate ◽  
Color Change ◽  
Ph Sensitivity ◽  
Gas Detection ◽  
Textile Sensors ◽  
Printed Sensors ◽  
Textile Sensor ◽  
Rhodamine Dye ◽  
Strong Acids ◽  
High Reaction Rate

For the immediate detection of gaseous strong acids, it is advantageous to employ colorimetric textile sensors based on halochromic dyes. Thus, a rhodamine dye with superior pH sensitivity and high thermal stability was synthesized and incorporated in nylon 6 and polyester fabrics to fabricate textile sensors through dyeing and printing methods. The spectral properties and solubility of the dye were examined; sensitivity to acidic gas as well as durability and reversibility of the fabricated textile sensors were investigated. Both dyed and printed sensors exhibited a high reaction rate and distinctive color change under the acidic condition owing to the high pH sensitivity of the dye. In addition, both sensors have outstanding durability and reversibility after washing and drying.

scholarly journals Single-Layer Pressure Textile Sensors with Woven Conductive Yarn Circuit

2020 ◽  
Vol 10 (8) ◽  
pp. 2877 ◽  
Author(s):  
Gaeul Kim ◽  
Chi Cuong Vu ◽  
Jooyong Kim
Keyword(s):  
Pressure Sensor ◽  
Pressure Sensors ◽  
Single Layer ◽  
Fast Response ◽  
Resistance Change ◽  
Load Pressure ◽  
Pressure Sensitive ◽  
High Durability ◽  
Textile Sensors ◽  
Conductive Fibers

Today, e-textiles have become a fundamental trend in wearable devices. Fabric pressure sensors, as a part of e-textiles, have also received much interest from many researchers all over the world. However, most of the pressure sensors are made of electronic fibers and composed of many layers, including an intermediate layer for sensing the pressure. This paper proposes the model of a single layer pressure sensor with electrodes and conductive fibers intertwined. The plan dimensions of the fabricated sensors are 14 x 14 mm, and the thickness is 0.4 mm. The whole area of the sensor is the pressure-sensitive point. As expected, results demonstrate an electrical resistance change from 283 Ω at the unload pressure to 158 Ω at the load pressure. Besides, sensors have a fast response time (50 ms) and small hysteresis (5.5%). The hysteresis will increase according to the pressure and loading distance, but the change of sensor loading distance is very small. Moreover, the single-layer pressure sensors also show high durability under many working cycles (20,000 cycles) or washing times (50 times). The single-layer pressure sensor is very thin and more flexible than the multi-layer pressure sensor. The structure of this sensor is also expected to bring great benefits to wearable technology in the future.

Adaptable pressure textile sensors based on a conductive polymer

2018 ◽  
Vol 3 (3) ◽  
pp. 034001 ◽  
Author(s):  
Marta Tessarolo ◽  
Luca Possanzini ◽  
Enrico Gianfranco Campari ◽  
Roberta Bonfiglioli ◽  
Francesco Saverio Violante ◽  
...  
Keyword(s):  
Conductive Polymer ◽  
Textile Sensors

scholarly journals Textile Sensors: Silk Composite Electronic Textile Sensor for High Space Precision 2D Combo Temperature–Pressure Sensing (Small 31/2019)

Small ◽  
2019 ◽  
Vol 15 (31) ◽  
pp. 1970161 ◽  
Author(s):  
Ronghui Wu ◽  
Liyun Ma ◽  
Chen Hou ◽  
Zhaohui Meng ◽  
Wenxi Guo ◽  
...  
Keyword(s):  
Pressure Sensing ◽  
Textile Sensors ◽  
Textile Sensor ◽  
High Space ◽  
Electronic Textile

scholarly journals Smarty Pants: Exploring Textile Pressure Sensors in Trousers for Posture and Behaviour Classification

Proceedings ◽  
2019 ◽  
Vol 32 (1) ◽  
pp. 19
Author(s):  
Skach ◽  
Stewart ◽  
Healey
Keyword(s):  
Random Forest ◽  
Social Behaviour ◽  
Pressure Sensors ◽  
Application Area ◽  
Body Postures ◽  
Textile Sensors ◽  
Forest Models ◽  
Random Forest Models ◽  
Potential Use

In this paper, we introduce a new modality for capturing body postures and social behaviour. Vice versa, we propose a new application area for on-body textile sensors. We have developed “smart trousers” with embedded textile pressure sensors that allow for classification of a large variety of postural movements as well as interactional states. Random Forest models are used to investigate those. Here, we give an overview of the research conducted and discuss potential use cases of the presented design.

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