Stretchable, Environment-Stable, and Knittable Ionic Conducting Fibers Based on Metallogels for Wearable Wide-Range and Durable Strain Sensors

2022 ◽  
Author(s):  
Qichun Feng ◽  
Kening Wan ◽  
Tianyi Zhu ◽  
Xiaoshan Fan ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Strain Sensors ◽  
Ionic Conducting ◽  
Wide Range

Wide-range linear viscoelastic hydrogels with high mechanical properties and their applications in quantifiable stress-strain sensors

2020 ◽  
Vol 399 ◽  
pp. 125697 ◽  
Author(s):  
Changshu Ma ◽  
Yi Wang ◽  
Zuming Jiang ◽  
Zhenxing Cao ◽  
Huiting Yu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Strain Sensors ◽  
Stress Strain ◽  
Wide Range ◽  
Linear Viscoelastic

scholarly journals Wrinkle-Enabled Highly Stretchable Strain Sensors for Wide-Range Health Monitoring with a Big Data Cloud Platform

2020 ◽  
Vol 12 (38) ◽  
pp. 43009-43017 ◽  
Author(s):  
Jian Huang ◽  
Jian Zhou ◽  
Yangmei Luo ◽  
Gan Yan ◽  
Yi Liu ◽  
...  
Keyword(s):  
Big Data ◽  
Health Monitoring ◽  
Strain Sensors ◽  
Cloud Platform ◽  
Wide Range ◽  
Highly Stretchable

scholarly journals Force transformation in spider strain sensors: white light interferometry

2011 ◽  
Vol 9 (71) ◽  
pp. 1254-1264 ◽  
Author(s):  
Clemens F. Schaber ◽  
Stanislav N. Gorb ◽  
Friedrich G. Barth
Keyword(s):  
White Light ◽  
Stimulus Range ◽  
Strain Sensors ◽  
Sensory Threshold ◽  
White Light Interferometry ◽  
Wide Range ◽  
Force Transformation ◽  
Slit Length ◽  
Stimulus Transformation ◽  
The Individual

Scanning white light interferometry and micro-force measurements were applied to analyse stimulus transformation in strain sensors in the spider exoskeleton. Two compound or ‘lyriform’ organs consisting of arrays of closely neighbouring, roughly parallel sensory slits of different lengths were examined. Forces applied to the exoskeleton entail strains in the cuticle, which compress and thereby stimulate the individual slits of the lyriform organs. (i) For the proprioreceptive lyriform organ HS-8 close to the distal joint of the tibia, the compression of the slits at the sensory threshold was as small as 1.4 nm and hardly more than 30 nm, depending on the slit in the array. The corresponding stimulus forces were as small as 0.01 mN. The linearity of the loading curve seems reasonable considering the sensor's relatively narrow biological intensity range of operation. The slits' mechanical sensitivity (slit compression/force) ranged from 106 down to 13 nm mN −1 , and gradually decreased with decreasing slit length. (ii) Remarkably, in the vibration-sensitive lyriform organ HS-10 on the metatarsus, the loading curve was exponential. The organ is thus adapted to the detection of a wide range of vibration amplitudes, as they are found under natural conditions. The mechanical sensitivities of the two slits examined in this organ in detail differed roughly threefold (522 and 195 nm mN −1 ) in the biologically most relevant range, again reflecting stimulus range fractionation among the slits composing the array.

scholarly journals Wearable Wide-Range Strain Sensors Based on Ionic Liquids and Monitoring of Human Activities

Sensors ◽  
2017 ◽  
Vol 17 (11) ◽  
pp. 2621 ◽  
Author(s):  
Shao-Hui Zhang ◽  
Feng-Xia Wang ◽  
Jia-Jia Li ◽  
Hong-Dan Peng ◽  
Jing-Hui Yan ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Human Activities ◽  
Strain Sensors ◽  
Wide Range

Wide-Range Strain Sensors Based on Highly Transparent and Supremely Stretchable Graphene/Ag-Nanowires Hybrid Structures

Small ◽  
2016 ◽  
Vol 12 (36) ◽  
pp. 5058-5065 ◽  
Author(s):  
Qi Li ◽  
Zaka Ullah ◽  
Weiwei Li ◽  
Yufen Guo ◽  
Jianbao Xu ◽  
...  
Keyword(s):  
Strain Sensors ◽  
Hybrid Structures ◽  
Wide Range ◽  
Ag Nanowires

High Sensitive Strain Microsensor based on Dielectric Matrix with Metal Nanoparticles

1996 ◽  
Vol 459 ◽  
Author(s):  
I. A. Konovalov ◽  
R. D. Fedorovich ◽  
S. A. Nepijko ◽  
L. V. Viduta
Keyword(s):  
Metal Nanoparticles ◽  
Electrical Resistance ◽  
Strain Sensors ◽  
Sensitive Strain ◽  
Dielectric Matrix ◽  
Dielectric Substrates ◽  
Tunnel Mechanism ◽  
Wide Range ◽  
The Matrix ◽  
Strain Coefficient

ABSTRACTA dielectric matrix, containing metal nanoparticles with interparticle spacings of 1–2 nm, is a system with tunnel mechanism of electrical conductivity. Its electrical resistance is very sensitive to deforming of matrix because it leads to changes in spaces between particles and as a result the potential barrier transperancy is varied.Different metals (Mo, Cr, Ta, Au, Pt, Bi, Al) and their films morphology structure were studied in order to get high sensitive strain sensors. Metal nanoparticles were deposited on elastic dielectric substrates. Strain coefficients were measured for a wide range of strains and temperatures. Variation of matrix structure gives possibilities to produce strain sensors with high electrical resistance and weak temperature dependence. The matrix with Au nanoparticles was found to have maximum strain coefficient (>100). These sensors can be manufactured in the miniature scale (sensitive area around 1 micron or less).

Development of Carbon-Nanotube-Based Nanocomposite Strain Sensor

2005 ◽  
Author(s):  
Giang T. Pham ◽  
Young-Bin Park ◽  
Ben Wang
Keyword(s):  
Carbon Nanotube ◽  
Network Formation ◽  
Composite Films ◽  
High Sensitivity ◽  
Industrial Applications ◽  
Melt Processing ◽  
Strain Sensors ◽  
Film Sensor ◽  
Loading Mode ◽  
Wide Range

This paper presents the development of carbon-nanotube-based, polymer composite films that can be used as high-sensitivity strain sensors. The films were fabricated via either melt processing or solution casting of thermoplastic polymer matrices containing low concentrations of multi-walled carbon nanotubes. The electrical resistivities of the films were measured in situ using laboratory-designed fixtures and data acquisition system. The measured resistivities were correlated with the applied strains to evaluate the sensitivity of the nanocomposite film sensor. Various types of loading mode, including tension and flexure were considered. The paper suggests that conductive network formation, thus strain sensitivity of the conductive films, can be tailored by controlling nanotube loading, degree of nanotube dispersion, and film fabrication process. The developed sensors exhibited a wide range of sensitivity, the upper limit showing nearly an order of magnitude increase compared to conventional strain gages. Military and industrial applications of the sensitivity-tunable strain sensors are presented.

scholarly journals Assessing the Tidal Volume through Wearables: A Scoping Review

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4124
Author(s):  
Vito Monaco ◽  
Cesare Stefanini
Keyword(s):  
Tidal Volume ◽  
Scoping Review ◽  
Wearable Devices ◽  
Strain Sensors ◽  
Clinical Settings ◽  
Motor Tasks ◽  
Eligibility Criteria ◽  
Optoelectronic Plethysmography ◽  
Wide Range ◽  
Methodological Approaches

The assessment of respiratory activity based on wearable devices is becoming an area of growing interest due to the wide range of available sensors. Accordingly, this scoping review aims to identify research evidence supporting the use of wearable devices to monitor the tidal volume during both daily activities and clinical settings. A screening of the literature (Pubmed, Scopus, and Web of Science) was carried out in December 2020 to collect studies: i. comparing one or more methodological approaches for the assessment of tidal volume with the outcome of a state-of-the-art measurement device (i.e., spirometry or optoelectronic plethysmography); ii. dealing with technological solutions designed to be exploited in wearable devices. From the initial 1031 documents, only 36 citations met the eligibility criteria. These studies highlighted that the tidal volume can be estimated by using different technologies ranging from IMUs to strain sensors (e.g., resistive, capacitive, inductive, electromagnetic, and optical) or acoustic sensors. Noticeably, the relative volumetric error of these solutions during quasi-static tasks (e.g., resting and sitting) is typically ≥10% but it deteriorates during dynamic motor tasks (e.g., walking). As such, additional efforts are required to improve the performance of these devices and to identify possible applications based on their accuracy and reliability.

scholarly journals A Sprayed Graphene Pattern-Based Flexible Strain Sensor with High Sensitivity and Fast Response

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1077 ◽  
Author(s):  
Wei Xu ◽  
Tingting Yang ◽  
Feng Qin ◽  
Dongdong Gong ◽  
Yijia Du ◽  
...  
Keyword(s):  
Strain Sensor ◽  
High Sensitivity ◽  
Fast Response ◽  
Strain Sensors ◽  
Biomedical Science ◽  
Gauge Factor ◽  
Experimental Conditions ◽  
Simple Method ◽  
Wide Range ◽  
Flexible Strain Sensor

Flexible strain sensors have a wide range of applications in biomedical science, aerospace industry, portable devices, precise manufacturing, etc. However, the manufacturing processes of most flexible strain sensors previously reported have usually required high manufacturing costs and harsh experimental conditions. Besides, research interests are often focused on improving a single attribute parameter while ignoring others. This work aims to propose a simple method of manufacturing flexible graphene-based strain sensors with high sensitivity and fast response. Firstly, oxygen plasma treats the substrate to improve the interfacial interaction between graphene and the substrate, thereby improving device performance. The graphene solution is then sprayed using a soft PET mask to define a pattern for making the sensitive layer. This flexible strain sensor exhibits high sensitivity (gauge factor ~100 at 1% strain), fast response (response time: 400–700 μs), good stability (1000 cycles), and low overshoot (<5%) as well. Those processes used are compatible with a variety of complexly curved substrates and is expected to broaden the application of flexible strain sensors.

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