Batch Fabrication of Customizable Silicone‐Textile Composite Capacitive Strain Sensors for Human Motion Tracking

Atalay, Asli; Sánchez, Vanessa; Atalay, Özgür; Vogt, Daniel M.; Haufe, Florian L.; Wood, Robert J.; Walsh, Conor J.

doi:10.1002/admt.201700136

Cited by 340 publications

(289 citation statements)

References 64 publications

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“…However, it should be noted that this linear relationship is not valid for the utilized polymer if the strain is too large. [46] To fabricate textile-based capacitive sensors, [51][52][53] multiple electrodes are placed on one side the textile materials surface, opposed to other ones on the other side of the textile structure, which is flexible material. [15] For instance, Baughman et al [54,55] fabricated a dielectric fiber-shaped capacitor-based strain sensor with good sensitivity as well as high linearity within a large strain range.…”

Section: Capacitive Sensormentioning

confidence: 99%

Textile‐Based Strain Sensor for Human Motion Detection

Wang

Zhang

2019

Energy & Environ Materials

188

109

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Human motion analysis consists of real‐time monitoring and recording of human body's kinematics. It is very essential to track ambulatory and daily‐life human motion, which is crucial for many applications and disciplines. Electronic textiles (e‐textiles) afford a valid alternative to traditional solid‐state sensors due to their merits of low cost, lightweight, flexibility, and feasibility to fit various human bodies. In this mini‐review, textile‐based sensor platforms and human motion analysis are well discussed in Section 1. Second, theoretical principles of textile‐based strain sensors are introduced including resistive, capacitive, and piezoelectrical sensors. Section 3 focuses on various types of textile materials that are functionalized as sensing systems by intrinsic or extrinsic modifications. Section 4 summaries various types of e‐textile‐based strain sensors for human motion analysis. The final two sections mainly present perspectives and challenges, and conclusions, respectively.

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Section: Capacitive Sensormentioning

confidence: 99%

Textile‐Based Strain Sensor for Human Motion Detection

Wang

Zhang

2019

Energy & Environ Materials

188

109

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“…These textiles have the characteristics of softness, light weight, and breathability and, thus, the potential for realizing comfort in wearable electronics. In recent years, intensive endeavors have been devoted to develop textile-based systems in sensitive sensors, energy harvesting, and storage (29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39). In particular, successful research has been reported on optical fiber, piezoelectricity, and resistivity-based smart textiles applied in the monitoring of pulse and respiratory signals (40)(41)(42)(43).…”

Section: Introductionmentioning

confidence: 99%

Machine-knitted washable sensor array textile for precise epidermal physiological signal monitoring

et al. 2020

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Wearable textile electronics are highly desirable for realizing personalized health management. However, most reported textile electronics can either periodically target a single physiological signal or miss the explicit details of the signals, leading to a partial health assessment. Furthermore, textiles with excellent property and comfort still remain a challenge. Here, we report a triboelectric all-textile sensor array with high pressure sensitivity and comfort. It exhibits the pressure sensitivity (7.84 mV Pa −1 ), fast response time (20 ms), stability (>100,000 cycles), wide working frequency bandwidth (up to 20 Hz), and machine washability (>40 washes). The fabricated TATSAs were stitched into different parts of clothes to monitor the arterial pulse waves and respiratory signals simultaneously. We further developed a health monitoring system for long-term and noninvasive assessment of cardiovascular disease and sleep apnea syndrome, which exhibits great advancement for quantitative analysis of some chronic diseases.

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“…While originally derived for static plate capacitors, this relationship also holds for capacitors made from silicone elastomers [Atalay et al 2017;Huang et al 2017;O'Brien et al 2014]. To minimize capacitive coupling effects with other objects, capacitors are typically shielded via insulating layers (see inset).…”

Section: Electrode Electrodementioning

confidence: 99%

Deformation Capture via Soft and Stretchable Sensor Arrays

et al. 2019

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Fig. 1. Left to right: We propose a method for the fabrication of soft and stretchable silicone based capacitive sensor arrays. The sensor provides dense stretch measurements that, together with a data-driven prior, allow for the capture of surface deformations in real-time and without the need for line-of-sight.We propose a hardware and software pipeline to fabricate flexible wearable sensors and use them to capture deformations without line of sight. Our first contribution is a low-cost fabrication pipeline to embed multiple aligned conductive layers with complex geometries into silicone compounds. Overlapping conductive areas from separate layers form local capacitors that measure dense area changes. Contrary to existing fabrication methods, the proposed technique only requires hardware that is readily available in modern fablabs. While area measurements alone are not enough to reconstruct the full 3D deformation of a surface, they become sufficient when paired with a data-driven prior. A novel semi-automatic tracking algorithm, based on an elastic surface geometry deformation, allows to capture ground-truth data with an optical mocap system, even under heavy occlusions or partially unobservable markers. The resulting dataset is used to train a regressor based on deep neural networks, directly mapping the area readings to global positions of surface vertices. We demonstrate the flexibility and accuracy of the proposed hardware and software in a series of controlled experiments, and design a prototype of wearable wrist, elbow and biceps sensors, which do not require line-of-sight and can be worn below regular clothing.

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Batch Fabrication of Customizable Silicone‐Textile Composite Capacitive Strain Sensors for Human Motion Tracking

Cited by 340 publications

References 64 publications

Textile‐Based Strain Sensor for Human Motion Detection

Textile‐Based Strain Sensor for Human Motion Detection

Machine-knitted washable sensor array textile for precise epidermal physiological signal monitoring

Deformation Capture via Soft and Stretchable Sensor Arrays

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