AI-Aided Gait Analysis with a Wearable Device Featuring a Hydrogel Sensor DOI Creative Commons
Saima Hasan,

Brent G. D’auria,

M. A. Parvez Mahmud

и другие.

Sensors, Год журнала: 2024, Номер 24(22), С. 7370 - 7370

Опубликована: Ноя. 19, 2024

Wearable devices have revolutionized real-time health monitoring, yet challenges persist in enhancing their flexibility, weight, and accuracy. This paper presents the development of a wearable device employing conductive polyacrylamide-lithium chloride-MXene (PLM) hydrogel sensor, an electronic circuit, artificial intelligence (AI) for gait monitoring. The PLM sensor includes tribo-negative polydimethylsiloxane (PDMS) tribo-positive polyurethane (PU) layers, exhibiting extraordinary stretchability (317% strain) durability (1000 cycles) while consistently delivering stable electrical signals. weighs just 23 g is strategically affixed to knee brace, harnessing mechanical energy generated during motion which converted into These signals are digitized then analyzed using one-dimensional (1D) convolutional neural network (CNN), achieving impressive accuracy 100% classification four distinct patterns: standing, walking, jogging, running. demonstrates potential lightweight energy-efficient sensing combined with AI analysis advanced biomechanical monitoring sports healthcare applications.

Язык: Английский

A novel dual-mode paper fiber sensor based on laser-induced graphene and porous salt-ion for monitoring humidity and pressure of human DOI

Aoxun Liang,

Wenhao Dong, Xiaoyu Li

и другие.

Chemical Engineering Journal, Год журнала: 2024, Номер unknown, С. 158184 - 158184

Опубликована: Ноя. 1, 2024

Язык: Английский

Процитировано

10

Porous Carbon Nanoparticle Composite Paper Fiber with Laser-Induced Graphene Surface Microstructure for Pressure Sensing DOI

Aoxun Liang,

Jin Zhai,

Jixu Zou

и другие.

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Янв. 24, 2025

In recent years, flexible pressure sensors have played an increasingly important role in human health monitoring. Inspired by traditional papermaking techniques, we developed a highly flexible, low-cost, and ecofriendly sensor using shredded paper fibers as the substrate. By combining properties of laser-induced graphene with structure fibers, improved internal pressure-sensitive designed conical surface microstructure, providing new insights into nanomaterial engineering. It features low resistance (424.44 Ω), energy consumption only 0.367 μW under 1.96 kPa, high sensitivity (1.68 kPa-1), wide monitoring range (98 Pa-111.720 kPa). The microstructure (MFTG) this study has total thickness comparable to A4 paper, is soft bendable, can be cut any shape like fit body, holds great potential for continuous activity status physiological information.

Язык: Английский

Процитировано

2

Numerical simulation of the influence of microchannel flow field on particle separation under changes in geometric structure DOI

Hongyuan Zou,

Wenbo Han,

Yuhang Zhong

и другие.

Physics of Fluids, Год журнала: 2025, Номер 37(1)

Опубликована: Янв. 1, 2025

This paper systematically investigated the microfluidic chip with inertial contraction and expansion channels based on numerical simulation methods. The influence of geometric shape changes particle separation effect was focused on. We varied microchannel structural parameters such as channel length width, overall curvature microchannel. results indicated that different structures hold diverse effects recovery rate. An appropriate shrinkage–expansion ratio can improve effect. In microchannel, we found six seven are optimal structure, which capable achieving effective three types particles. vortex structure in dramatically impacts focusing width particles distance particles, may be considered internal mechanism to explain trajectory channel. Furthermore, has a great rate As degree bending leaps, will first decrease then increase. study establishes theoretical foundation for understanding interaction between diversifications chips efficiency.

Язык: Английский

Процитировано

1

Ultrastretchable, Ultralow Hysteresis, High-Toughness Hydrogel Strain Sensor for Pressure Recognition with Deep Learning DOI
Wei‐Chen Huang, Xi Wang,

Fanchen Luo

и другие.

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(37), С. 49834 - 49844

Опубликована: Сен. 4, 2024

Hydrogel, as a promising material for wide range of applications, has demonstrated considerable potential use in flexible wearable devices and engineering technologies. However, simultaneously realizing the ultrastretchability, low hysteresis, high toughness hydrogels is still great challenge. Here, we present dual physically cross-linked polyacrylamide (PAM)/sodium hyaluronate (HA)/montmorillonite (MMT) hydrogel. The introduction HA increases degree chain entanglement, addition MMT acts stress dissipation center cross-linking agent, resulting hydrogel with hysteretic properties. This synthesized by simple strategy exhibited ultrahigh stretchability (3165%), breaking (228 kPa), (4.149 MJ/m

Язык: Английский

Процитировано

6

Wireless Flexible Actuator Photoelectric Synergistically Driven for Environment Adaptability Crawling Robots DOI

Zhengyan Zhang,

Yu-Bo Guo,

Fan Bu

и другие.

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Янв. 26, 2025

Wirelessly driven flexible actuators are crucial to the development of robotic crawling. However, great challenges still remain for crawling in complex environments. Herein, we reported a wireless actuator synergistically by power transmission (WPT) technology and near-infrared (NIR) light, which consists poly(dimethylsiloxane)-graphene oxide (PDMS-GO) composite layer, eutectic gallium-indium alloy (EGaIn), PDMS polyimide (PI) layer. By optimizing parameters EGaIn concentration PDMS-GO film, has excellent bending ability blocking force under different conditions photoelectronic synergy. In addition, fabricated robot with high environmental adaptability adding structures at both ends actuator, causes discrepancy friction between front rear feet. The stability, large deformation, wirelessly on plane, slope, plane roughnesses. This work provides an idea application robots

Язык: Английский

Процитировано

0

Numerical Investigation of Axial Velocity Uniformity in Porous Medium of Gasoline Particulate Filters DOI Creative Commons
Yuxin Hu, Fan Zhang, Yiqiang Pei

и другие.

Applied Sciences, Год журнала: 2025, Номер 15(7), С. 3854 - 3854

Опубликована: Апрель 1, 2025

In order to meet new real-world emissions standards and reduce particulates emitted by GDI engines, automakers are increasingly adopting gasoline particulate filters (GPFs). The uniformity of axial permeation velocity through porous medium in GPFs significantly impacts filtration efficiency. Consequently, a three-dimensional single-channel GPF–CFD model is developed investigate the impact partition coatings pins on flow characteristics. Different coating amounts compared adjusting porosity using GPF model, with strategically placed along upper lower sides inlet channel. Simulation results indicate that optimizing length across different coated sections enhances consistency velocity, particularly when ratio falls within range 30–40%. Pins variance increasing near surface, symmetrical arrangement four pairs height 0.3 mm yielding optimal performance. Moreover, combination partitions shows potential improve maximum homogeneity approximately 75%.

Язык: Английский

Процитировано

0

Effect of gas nitriding on microhardness and microstructure of laser cladding iron-based alloy coating DOI
Gaolin Yang,

L.T. Pan,

Jiake Deng

и другие.

Journal of Laser Applications, Год журнала: 2025, Номер 37(2)

Опубликована: Апрель 7, 2025

The demanding service environment of feed screws in injection molding machines, characterized by metal friction, extrusion, and polymer corrosion, necessitates enhanced hardness, wear resistance, corrosion resistance. Traditional strengthening methods involve nickel-based coating followed nitriding, yet iron-based coatings, which are more cost-effective. This study compares laser-clad alloy coatings with those postgas utilizing various characterization techniques to assess changes microhardness, metallography, phase composition, elemental distribution. nitriding process significantly alters the microstructure microhardness forming a distinct nitride layer transition layer. Nitrogen ions penetrate surface, γ′-Fe4N ɛ-Fe2-3N phases upon saturation, resulting 200 μm-thick 5 μm compound at surface diffusion primarily α-Fe(N). γ′ achieves maximum 1214.1 HV near decreases depth nitrogen content reduction. At 180 depth, reverts prenitriding levels 850 HV. Below layer, absence leads ferrite decomposition further reduction an average drop from 811.4 480.9 Furthermore, disproportionate ratio within ɛ/γ′ dual-phase system results marked deterioration resistance nitrided specimens. imbalance induces microstructural incompatibilities, compromising both tribological performance electrochemical stability under operational conditions.

Язык: Английский

Процитировано

0

Carbon-based flexible strain sensors: Recent advances and performance insights in human motion detection DOI Creative Commons

Ahmed I.J. Alqaderi,

Narayanan Ramakrishnan

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162609 - 162609

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0

MXene-Enhanced Laser-Induced Graphene Flexible Sensor with Rapid Response for Monitoring Pilots’ Body Motion DOI Creative Commons
Xia Lei, Hongyun Fan,

Yilin Zhao

и другие.

Micromachines, Год журнала: 2025, Номер 16(5), С. 513 - 513

Опубликована: Апрель 27, 2025

Flexible wearable strain sensors demonstrate promising application prospects in health monitoring, human-machine interaction, motion tracking, and the detection of human physiological signals. Although laser-induced graphene (LIG) materials have been extensively utilized these scenarios, traditional types LIG are constrained by intrinsic limitations, including discontinuous conductive networks electromechanical responsive hysteresis. These limitations hinder their applications micro-strain scenarios. Consequently, enhancing performance LIG-based has become a crucial priority. To address this challenge, we developed novel MXene/LIG composite featuring optimized interfacial coupling effects through systematic enhancement LIG. The flexible sensor fabricated using exhibits exceptional performance, an ultra-low sheet resistance 14.1 Ω, high sensitivity 20.7, limit 0.05%, rapid response time approximately 65 ms. improvements significantly enhance responsiveness sensitivity. Furthermore, remarkable stability under varying tensile strains, particularly showing outstanding repeatability across 2500 cyclic tests. Notably, when applied to pilot monitoring MXene/LIG-based demonstrates robust capability detecting body movement signals such as micro-expressions joint movements. This establishes highly effective technological solution for real-time pilots' states during operational

Язык: Английский

Процитировано

0

The importance of patterning design in laser-induced graphene for advanced applications DOI

Jianwei Zhai,

Zhou Yu, Jun Hu

и другие.

Journal of Manufacturing Processes, Год журнала: 2025, Номер 146, С. 211 - 224

Опубликована: Май 7, 2025

Язык: Английский

Процитировано

0