An intrinsically stretchable and ultrasensitive nanofiber-based resistive pressure sensor for wearable electronics

2020 ◽  
Vol 8 (16) ◽  
pp. 5361-5369 ◽  
Author(s):  
Fang-Cheng Liang ◽  
Hau-Jen Ku ◽  
Chia-Jung Cho ◽  
Wei-Cheng Chen ◽  
Wen-Ya Lee ◽  
...  
Keyword(s):  
Response Time ◽  
Pressure Sensor ◽  
Applied Pressure ◽  
Normal Pressure ◽  
Lateral Strain ◽  
Mechanical Stimuli ◽  
Wearable Electronics ◽  
Human Machine Interfaces ◽  
Potential Applications ◽  
Ultrahigh Sensitivity

Nanofiber-based electronics with unique fibrous interlocked microstructures are capable of differentiating various mechanical stimuli, such as normal pressure, lateral strain, and bending. Skin-inspired electronics with an ultrahigh sensitivity of 71.07 kPa−1 under a small applied pressure (<0.06 kPa), a rapid response time (<2 ms), and highly reproducible stability (>5000 cycles) are reported, thereby demonstrating their potential applications in versatile human–machine interfaces.

A flexible pressure sensor based on an MXene–textile network structure

2019 ◽  
Vol 7 (4) ◽  
pp. 1022-1027 ◽  
Author(s):  
Tongkuai Li ◽  
Longlong Chen ◽  
Xiang Yang ◽  
Xin Chen ◽  
Zhihan Zhang ◽  
...  
Keyword(s):  
Network Structure ◽  
Pressure Sensor ◽  
High Performance ◽  
Pressure Sensors ◽  
Wearable Electronics ◽  
Physiological Signal ◽  
Signal Perception ◽  
Performance Pressure ◽  
Human Machine Interfaces ◽  
Flexible Pressure Sensor

High-performance pressure sensors have attracted considerable attention recently due to their promising applications in touch displays, wearable electronics, human–machine interfaces, and real-time physiological signal perception.

Scalable fabrication of free-standing, stretchable CNT/TPE ultrathin composite films for skin adhesive epidermal electronics

2018 ◽  
Vol 6 (25) ◽  
pp. 6666-6671 ◽  
Author(s):  
Yun Liang ◽  
Peng Xiao ◽  
Shuai Wang ◽  
Jiangwei Shi ◽  
Jiang He ◽  
...  
Keyword(s):  
Human Health ◽  
Composite Films ◽  
Wearable Electronics ◽  
Free Standing ◽  
Human Machine Interfaces ◽  
Potential Applications ◽  
Epidermal Electronics

Wearable electronics have drawn extensive interest on account of their potential applications in smart human–machine interfaces, wearable human-health monitors and mimicking biological organs.

scholarly journals A Flexible and Highly Sensitive Inductive Pressure Sensor Array Based on Ferrite Films

Sensors ◽  
2019 ◽  
Vol 19 (10) ◽  
pp. 2406 ◽  
Author(s):  
Xinran Tang ◽  
Yihui Miao ◽  
Xinjian Chen ◽  
Baoqing Nie
Keyword(s):  
Pressure Sensor ◽  
Sensor Array ◽  
Pressure Sensors ◽  
Separation Distance ◽  
Spiral Inductor ◽  
Ferrite Film ◽  
Wearable Electronics ◽  
Highly Sensitive ◽  
Ultrahigh Sensitivity ◽  
Inductive Pressure

There is a rapid growing demand for highly sensitive, easy adaptive and low-cost pressure sensing solutions in the fields of health monitoring, wearable electronics and home care. Here, we report a novel flexible inductive pressure sensor array with ultrahigh sensitivity and a simple construction, for large-area contact pressure measurements. In general, the device consists of three layers: a planar spiral inductor layer and ferrite film units attached on a polyethylene terephthalate (PET) membrane, which are separated by an array of elastic pillars. Importantly, by introducing the ferrite film with an excellent magnetic permeability, the effective permeability around the inductor is greatly influenced by the separation distance between the inductor and the ferrite film. As a result, the value of the inductance changes largely as the separation distance varies as an external load applies. Our device has achieved an ultrahigh sensitivity of 1.60 kPa−1 with a resolution of 13.61 Pa in the pressure range of 0–0.18 kPa, which is comparable to the current state-of-the-art flexible pressure sensors. More remarkably, our device shows an outstanding stability when exposed to environmental interferences, e.g., electrical noises from skin surfaces (within 0.08% variations) and a constant pressure load for more than 32 h (within 0.3% variations). In addition, the device exhibits a fast response time of 111 ms and a good repeatability under cyclic pressures varying from 38.45 to 177.82 Pa. To demonstrate its practical usage, we have successfully developed a 4 × 4 inductive pressure sensor array into a wearable keyboard for a smart electronic calendar application.

Development of circuit solution and design of capacitive pressure sensor array for applied robotics

2020 ◽  
Vol 8 (4) ◽  
pp. 296-307
Author(s):  
Konstantin Krestovnikov ◽  
Aleksei Erashov ◽  
Аleksandr Bykov
Keyword(s):  
Pressure Sensor ◽  
Output Signal ◽  
Sensor Array ◽  
Applied Pressure ◽  
Pressure Sensors ◽  
Fine Tuning ◽  
Capacitive Pressure Sensor ◽  
Cell Parameters ◽  
Linear Pattern ◽  
Sensor Structure

This paper presents development of pressure sensor array with capacitance-type unit sensors, with scalable number of cells. Different assemblies of unit pressure sensors and their arrays were considered, their characteristics and fabrication methods were investigated. The structure of primary pressure transducer (PPT) array was presented; its operating principle of array was illustrated, calculated reference ratios were derived. The interface circuit, allowing to transform the changes in the primary transducer capacitance into voltage level variations, was proposed. A prototype sensor was implemented; the dependency of output signal power from the applied force was empirically obtained. In the range under 30 N it exhibited a linear pattern. The sensitivity of the array cells to the applied pressure is in the range 134.56..160.35. The measured drift of the output signals from the array cells after 10,000 loading cycles was 1.39%. For developed prototype of the pressure sensor array, based on the experimental data, the average signal-to-noise ratio over the cells was calculated, and equaled 63.47 dB. The proposed prototype was fabricated of easily available materials. It is relatively inexpensive and requires no fine-tuning of each individual cell. Capacitance-type operation type, compared to piezoresistive one, ensures greater stability of the output signal. The scalability and adjustability of cell parameters are achieved with layered sensor structure. The pressure sensor array, presented in this paper, can be utilized in various robotic systems.

CMOS-MEMS Based Current Mirror MOSFET Embedded Pressure Sensor for Healthcare and Biomedical Applications

2013 ◽  
Vol 647 ◽  
pp. 315-320 ◽  
Author(s):  
Pradeep Kumar Rathore ◽  
Brishbhan Singh Panwar
Keyword(s):  
Pressure Sensor ◽  
Biomedical Applications ◽  
Circuit Simulation ◽  
Applied Pressure ◽  
Pressure Sensors ◽  
Cmos Technology ◽  
Current Mirror ◽  
Sensing Element ◽  
Pressure Sensing ◽  
Cmos Mems

This paper reports on the design and optimization of current mirror MOSFET embedded pressure sensor. A current mirror circuit with an output current of 1 mA integrated with a pressure sensing n-channel MOSFET has been designed using standard 5 µm CMOS technology. The channel region of the pressure sensing MOSFET forms the flexible diaphragm as well as the strain sensing element. The piezoresistive effect in MOSFET has been exploited for the calculation of strain induced carrier mobility variation. The output transistor of the current mirror forms the active pressure sensing MOSFET which produces a change in its drain current as a result of altered channel mobility under externally applied pressure. COMSOL Multiphysics is utilized for the simulation of pressure sensing structure and Tspice is employed to evaluate the characteristics of the current mirror pressure sensing circuit. Simulation results show that the pressure sensor has a sensitivity of 10.01 mV/MPa. The sensing structure has been optimized through simulation for enhancing the sensor sensitivity to 276.65 mV/MPa. These CMOS-MEMS based pressure sensors integrated with signal processing circuitry on the same chip can be used for healthcare and biomedical applications.

scholarly journals Foldable and washable textile-based OLEDs with a multi-functional near-room-temperature encapsulation layer for smart e-textiles

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
So Yeong Jeong ◽  
Hye Rin Shim ◽  
Yunha Na ◽  
Ki Suk Kang ◽  
Yongmin Jeon ◽  
...  
Keyword(s):  
Room Temperature ◽  
Wearable Electronics ◽  
Ambient Conditions ◽  
Light Emitting ◽  
Stable Operating ◽  
Mechanical Durability ◽  
Potential Applications ◽  
Wearable Electronic ◽  
Data Signal ◽  
Wearable Electronic Devices

AbstractWearable electronic devices are being developed because of their wide potential applications and user convenience. Among them, wearable organic light emitting diodes (OLEDs) play an important role in visualizing the data signal processed in wearable electronics to humans. In this study, textile-based OLEDs were fabricated and their practical utility was demonstrated. The textile-based OLEDs exhibited a stable operating lifetime under ambient conditions, enough mechanical durability to endure the deformation by the movement of humans, and washability for maintaining its optoelectronic properties even in water condition such as rain, sweat, or washing. In this study, the main technology used to realize this textile-based OLED was multi-functional near-room-temperature encapsulation. The outstanding impermeability of TiO2 film deposited at near-room-temperature was demonstrated. The internal residual stress in the encapsulation layer was controlled, and the device was capped by highly cross-linked hydrophobic polymer film, providing a highly impermeable, mechanically flexible, and waterproof encapsulation.

Stretchable dual cross-linked silicon elastomer with superhydrophobic surface and fast triple self-healing ability at room temperature

Soft Matter ◽  
2021 ◽  
Author(s):  
Yuxing Shan ◽  
shuai liang ◽  
Xiangkai Mao ◽  
Jie Lu ◽  
Lili Liu ◽  
...  
Keyword(s):  
Superhydrophobic Surface ◽  
Room Temperature ◽  
Superhydrophobic Surfaces ◽  
Self Healing ◽  
Wearable Electronics ◽  
Actual Application ◽  
Potential Applications

Abstract. Stretchable elastomers with superhydrophobic surfaces have potential applications in wearable electronics. However, various types of damage inevitably occur on these elastomers in actual application, resulting in deterioration of the...

scholarly journals Measurement of response time and detection of degradation in pressure sensor/sensing-line systems

1985 ◽  
Vol 89 (1) ◽  
pp. 91-99 ◽  
Author(s):  
M.E. Buchanan ◽  
L.F. Miller ◽  
J.A. Thie ◽  
T.W. Kerlin ◽  
G. Ragan ◽  
...  
Keyword(s):  
Response Time ◽  
Pressure Sensor

scholarly journals Tactile Interaction Sensor with Millimeter Sensing Acuity

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4274
Author(s):  
Eunsuk Choi ◽  
Sunjin Kim ◽  
Jinsil Gong ◽  
Hyeonjeong Sun ◽  
Minjin Kwon ◽  
...  
Keyword(s):  
Shear Force ◽  
High Reliability ◽  
Normal Pressure ◽  
Low Noise ◽  
Sensing Material ◽  
High Uniformity ◽  
Tactile Interaction ◽  
Force Direction ◽  
Potential Applications ◽  
Contact Shape

In this article we report on a 3 × 3 mm tactile interaction sensor that is able to simultaneously detect pressure level, pressure distribution, and shear force direction. The sensor consists of multiple mechanical switches under a conducting diaphragm. An external stimulus is measured by the deflection of the diaphragm and the arrangement of mechanical switches, resulting in low noise, high reliability, and high uniformity. Our sensor is able to detect tactile forces as small as ~50 mgf along with the direction of the shear force. It also distinguishes whether there is a normal pressure during slip motion. We also succeed in detecting the contact shape and the contact motion, demonstrating potential applications in robotics and remote input interfaces. Since our sensor has a simple structure and its function depends only on sensor dimensions, not on an active sensing material, in comparison with previous tactile sensors, our sensor shows high uniformity and reliability for an array-type integration.

Sign in / Sign up

Export Citation Format

Share Document