Two-Sided Topological Architecture on a Monolithic Flexible Substrate for Ultrasensitive Strain Sensors

2019 ◽  
Vol 11 (46) ◽  
pp. 43543-43552 ◽  
Author(s):  
He Yu ◽  
Yunlu Lian ◽  
Teng Sun ◽  
Xiaonan Yang ◽  
Yang Wang ◽  
...  
Keyword(s):  
Flexible Substrate ◽  
Strain Sensors

scholarly journals Nanowire Ring Embedded in a Flexible Substrate for Local Strain Detection

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 347
Author(s):  
Shengkun Li ◽  
Yue Qin ◽  
Xin Li ◽  
Yuejin Zhao
Keyword(s):  
Detection System ◽  
Structural Parameters ◽  
Flexible Substrate ◽  
Ring Cavity ◽  
Local Strain ◽  
Strain Sensors ◽  
Resonant Wavelength ◽  
Gauge Factor ◽  
Light Sources ◽  
End To End

Optical sensing has attracted more and more attention in recent years with the advance in planar waveguide fabrication processes. The photon, as a carrier of information in sensing areas, could have a better performance than electrons. We propose a novel end-to-end ring cavity to fabricate sensitive units of a strain sensor. We then propose a method of combining a flexible substrate with an end-to-end semiconductor nanowire ring cavity to fabricate novel strain sensors. We used a tuning resonant wavelength detected by a homebuilt excitation and detection system to measure applied strain. The resonant wavelength of the strain gauge was red-shift and linear tuned with increasing strain. The gauge factor was about 50, calculated through experiments and theory, and Q was 1938, with structural parameters L = 70 µm and d = 1 µm. The high sensitivity makes it possible to measure micro deformation more accurately. End-to-end coupling active nanowire waveguides eliminate the shortcomings of side by side coupling structures, which have the phasing shift with no minor optical density loss. This resonator in flexible substrates could be used not only as on-chip strain sensors for micro or nano deformation detecting but also as tunable light sources for photonic integrated circuits.

scholarly journals Thin Film Protected Flexible Nanoparticle Strain Sensors: Experiments and Modeling

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2584 ◽  
Author(s):  
Evangelos Aslanidis ◽  
Evangelos Skotadis ◽  
Evangelos Moutoulas ◽  
Dimitris Tsoukalas
Keyword(s):  
Protective Coatings ◽  
Flexible Substrate ◽  
Mechanical Strain ◽  
Atomic Layer ◽  
Strain Sensors ◽  
Solvent Free ◽  
Alumina Layer ◽  
Sensor Resistance ◽  
Proposed Model ◽  
Effective Manner

In this work, the working performance of Platinum (Pt), solvent-free nanoparticle (NP)-based strain sensors made on a flexible substrate has been studied. First, a new model has been developed in order to explain sensor behaviour under strain in a more effective manner than what has been previously reported. The proposed model also highlights the difference between sensors based on solvent-free and solvent-based NPs. As a second step, the ability of atomic layer deposition (ALD) developed Al2O3 (alumina) thin films to act as protective coatings against humidity while in adverse conditions (i.e., variations in relative humidity and repeated mechanical stress) has been evaluated. Two different alumina thicknesses (5 and 11 nm) have been tested and their effect on protection against humidity is studied by monitoring sensor resistance. Even in the case of adverse working conditions and for increased mechanical strain (up to 1.2%), it is found that an alumina layer of 11 nm provides sufficient sensor protection, while the proposed model remains valid. This certifies the appropriateness of the proposed strain-sensing technology for demanding applications, such as e-skin and pressure or flow sensing, as well as the possibility of developing a comprehensive computational tool for NP-based devices.

Flexible substrate micro-crystalline silicon and gated amorphous silicon strain sensors

2006 ◽  
Vol 53 (2) ◽  
pp. 380-385 ◽  
Author(s):  
Lisong Zhou ◽  
Soyoun Jung ◽  
E. Brandon ◽  
T.N. Jackson
Keyword(s):  
Amorphous Silicon ◽  
Crystalline Silicon ◽  
Flexible Substrate ◽  
Strain Sensors

scholarly journals Concentric Array of Printed Strain Sensors for Structural Health Monitoring

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 1997 ◽  
Author(s):  
Daniel Zymelka ◽  
Kazuyoshi Togashi ◽  
Takeshi Kobayashi
Keyword(s):  
Sensor Array ◽  
Crack Formation ◽  
Flexible Substrate ◽  
Local Strain ◽  
Strain Sensors ◽  
Civil Infrastructure ◽  
Civil Structures ◽  
Sensing Systems ◽  
Potential Applications ◽  
Crack Tips

Civil infrastructure is expanding around the world. The ever-growing trend toward urbanization drives the demand for new investments. However, the new constructions and gradual deterioration of those already existing, especially bridges, give rise to concerns about their proper maintenance. To improve safety and drive down maintenance costs of civil structures, there is a need for inexpensive sensing systems capable of reliable and automated monitoring. In this study, we present a new concept of thin-film strain sensors arranged in an array with a concentric layout that is incorporated into a flexible substrate sheet. The designed sensor array is intended to analyze strains in the proximity of round holes made at the crack tips, found in the investigated construction elements of civil structures. In this study, the performance of the sensor array was demonstrated using measurements taken on a highway bridge in one of the largest cities in Japan. We show that it can measure local strain distribution and indicate a region with risk for crack formation. The demonstrated results show new area of potential applications for the printed strain sensors in monitoring civil structures.

Modeling of Contact Patch in Dual-Chamber Pneumatic Tires

2018 ◽  
Vol 46 (2) ◽  
pp. 78-92 ◽  
Author(s):  
A. I. Kubba ◽  
G. J. Hall ◽  
S. Varghese ◽  
O. A. Olatunbosun ◽  
C. J. Anthony
Keyword(s):  
Strain Sensors ◽  
Surface Strain ◽  
Wireless Data ◽  
Data Logger ◽  
Dual Chamber ◽  
Piezoelectric Polymer ◽  
Pure Rolling ◽  
Piezoelectric Elements ◽  
Strain Data ◽  
Deformation Patterns

ABSTRACT This study presents an investigation of the inner tire surface strain measurement by using piezoelectric polymer transducers adhered on the inner liner of the tire, acting as strain sensors in both conventional and dual-chamber tires. The piezoelectric elements generate electrical charges when strain is applied. The inner liner tire strain can be found from the generated charge. A wireless data logger was employed to measure and transmit the measured signals from the piezoelectric elements to a PC to store and display the readout signals in real time. The strain data can be used as a monitoring system to recognize tire-loading conditions (e.g., traction, braking, and cornering) in smart tire technology. Finite element simulations, using ABAQUS, were employed to estimate tire deformation patterns in both conventional and dual-chamber tires for pure rolling and steady-state cornering conditions for different inflation pressures to simulate on-road and off-road riding tire performances and to compare with the experimental results obtained from both the piezoelectric transducers and tire test rig.

Thickness Effects on Microwave Magnetic Properties of FeCoBSi Films Deposited on Flexible Substrate

PIERS Online ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 105-108 ◽  
Author(s):  
Haipeng Lu ◽  
Jing Yang ◽  
Longjiang Deng
Keyword(s):  
Magnetic Properties ◽  
Flexible Substrate

Electrical Failure and Damage Analysis of Multi-Layer Metal Films on Flexible Substrate during Cyclic Bending Deformation

2011 ◽  
Author(s):  
Byoung-Joon Kim ◽  
Hae-A-Seul Shin ◽  
In-Suk Choi ◽  
Young-Chang Joo
Keyword(s):  
Fatigue Resistance ◽  
Electrical Resistance ◽  
Metal Film ◽  
Flexible Substrate ◽  
Resistance Change ◽  
Cyclic Bending ◽  
Capping Layer ◽  
Bending Strain ◽  
Cu Film ◽  
Electrical Resistance Change

Abstract The electrical resistance Cu film on flexible substrate was investigated in cyclic bending deformation. The electrical resistance of 1 µm thick Cu film on flexible substrate increased up to 120 % after 500,000 cycles in 1.1 % tensile bending strain. Crack and extrusion were observed due to the fatigue damage of metal film. Low bending strain did not cause any damage on metal film but higher bending strain resulted in severe electrical and mechanical damage. Thinner film showed higher fatigue resistance because of the better mechanical property of thin film. Cu film with NiCr under-layer showed poorer fatigue resistance in tensile bending mode. Ni capping layer did not improve the fatigue resistance of Cu film, but Al capping layer suppressed crack formation and lowered electrical resistance change. The NiCr under layer, Ni capping layer, and Al capping layer effect on electrical resistance change of Cu film was compared with Cu only sample.

Structure and Optical Properties CdS and CdTe Films on Flexible Substrate Obtained by DC Magnetron Sputtering for Solar Cells

2017 ◽  
Vol 9 (5) ◽  
pp. 05035-1-05035-6 ◽  
Author(s):  
G. I. Kopach ◽  
◽  
R. P. Mygushchenko ◽  
G. S. Khrypunov ◽  
A. I. Dobrozhan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Cells ◽  
Magnetron Sputtering ◽  
Flexible Substrate ◽  
Dc Magnetron Sputtering ◽  
Cdte Films
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