Flexible wide-range multidimensional force sensors inspired by bones embedded in muscle DOI Creative Commons
Jie Zhang, Xiaojuan Hou, Shuo Qian

et al.

Microsystems & Nanoengineering, Journal Year: 2024, Volume and Issue: 10(1)

Published: May 22, 2024

Abstract Flexible sensors have been widely studied for use in motion monitoring, human‒machine interactions (HMIs), personalized medicine, and soft intelligent robots. However, their practical application is limited by low output performance, narrow measuring range, unidirectional force detection. Here, to achieve flexibility high performance simultaneously, we developed a flexible wide-range multidimensional sensor (FWMFS) similar bones embedded muscle structures. The adjustable magnetic field endows the FWMFS with perception detecting forces different directions. multilayer stacked coils significantly improved from μV mV level while ensuring miniaturization. optimized exhibited voltage sensitivity of 0.227 mV/N (0.5–8.4 N) 0.047 (8.4–60 response normal ranging 0.5 N 60 could detect lateral 0.2–1.1 sensitivities 1.039 (0.2–0.5 0.194 (0.5–1.1 N). In terms measurements, can monitor finger pressure sliding trajectories taps, as well measure plantar assessing human movement. signals five movements collected were analyzed using k-nearest neighbors classification algorithm, which achieved recognition accuracy 92%. Additionally, an artificial intelligence biometric authentication system being that classifies recognizes user passwords. Based on measurement ability FWMFS, direction ball movement be distinguished, communication systems such Morse Code expanded. This research has significant potential sensing spatial recognition.

Language: Английский

Recent advances in wearable electromechanical sensors—Moving towards machine learning-assisted wearable sensing systems DOI

Nian Dai,

Iek Man Lei, Zhaoyang Li

et al.

Nano Energy, Journal Year: 2022, Volume and Issue: 105, P. 108041 - 108041

Published: Nov. 26, 2022

Language: Английский

Citations

71
Coaxially printed magnetic mechanical electrical hybrid structures with actuation and sensing functionalities DOI Creative Commons
Yuanxi Zhang, Chengfeng Pan, Pengfei Liu

et al.

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: July 22, 2023

Soft electromagnetic devices have great potential in soft robotics and biomedical applications. However, existing soft-magneto-electrical would limited hybrid functions suffer from damaging stress concentrations, delamination or material leakage. Here, we report a magnetic-mechanical-electrical (MME) core-sheath fiber to overcome these challenges. Assisted by the coaxial printing method, MME can be printed into complex 2D/3D structures with integrated magnetoactive conductive properties, further enabling including programmable magnetization, somatosensory, magnetic actuation along simultaneous wireless energy transfer. To demonstrate of devices, precise minimally invasive electro-ablation was performed flexible catheter control, actuation-sensing durable somatosensory gripper, transmission were demonstrated an untethered robot. Our work thus provides design strategy for unexplored functions.

Language: Английский

Citations

54
A smart finger patch with coupled magnetoelastic and resistive bending sensors DOI

Ziyi Dai,

Mingrui Wang, Hongjian Wang

et al.

Journal of Semiconductors, Journal Year: 2025, Volume and Issue: 46(1), P. 012601 - 012601

Published: Jan. 1, 2025

Abstract In the era of Metaverse and virtual reality (VR)/augmented (AR), capturing finger motion force interactions is crucial for immersive human-machine interfaces. This study introduces a flexible electronic skin index finger, addressing coupled perception both state process in dynamic tactile sensing. The device integrates resistive giant magnetoelastic sensors, enabling detection surface pressure joint bending. e-skin identifies three phases action: bending state, normal tangential (sweeping). system comprises carbon nanotubes (CNT)/polydimethylsiloxane (PDMS) films sensing sensors (NdFeB particles, EcoFlex, coils) detection. inward sensor, based on self-assembled microstructures, exhibits directional specificity with response time under 120 ms sensitivity from 0° to 120°. demonstrate specific responses frequency deformation magnitude, as well roughness during sliding material hardness. system’s capability demonstrated through tactile-based bread type condition recognition, achieving 92% accuracy. intelligent patch shows broad potential enhancing across various fields, VR/AR interfaces medical diagnostics smart manufacturing industrial automation.

Language: Английский

Citations

3
Piezo-Capacitive Flexible Pressure Sensor with Magnetically Self-Assembled Microneedle Array DOI
Shengbin Li, Yifan Wang,

Yuanzhao Wu

et al.

ACS Sensors, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 27, 2025

Flexible pressure sensors are pivotal in advancing artificial intelligence, the Internet of Things (IoT), and wearable technologies. While microstructuring functional layer these effectively enhances their performance, current fabrication methods often require complex equipment time-consuming processes. Herein, we present a novel magnetization-induced self-assembly method to develop magnetically grown microneedle array as dielectric for flexible capacitive sensors. By precisely controlling magnetic particle concentration dynamic field strength, achieve tunable morphology. The resulting sensor exhibits high sensitivity (4.11 kPa-1), an ultrafast response time (20 ms), excellent cyclic stability (≈1700 cycles), flexibility. We demonstrate real-time monitoring various physiological signals including pulse, grip force, breathing rate, head motion. This study introduces promising approach fabricating high-performance sensors, potentially enabling more intuitive effective human-machine interactions.

Language: Английский

Citations

3
Ultrasoft and Biocompatible Magnetic-Hydrogel-Based Strain Sensors for Wireless Passive Biomechanical Monitoring DOI
Qi Zhang, Guannan Yang, Xue Li

et al.

ACS Nano, Journal Year: 2022, Volume and Issue: 16(12), P. 21555 - 21564

Published: Dec. 8, 2022

Implantable flexible mechanical sensors have exhibited great potential in health monitoring and disease diagnosis due to continuous real-time capability. However, the wires power supply required current devices cause inconvenience risks. Magnetic-based demonstrated advantages wireless passive sensing, but mismatched properties, poor biocompatibility, insufficient sensitivity limited their applications biomechanical monitoring. Here, a magnetic-based strain sensor based on gelatin methacrylate/Fe3O4 magnetic hydrogel has been fabricated. The exhibits ultrasoft strong long-term stability saline solution can monitor strains down 50 μm. A model of sensing process is established identify optimal detection location relation between relative permeability sensors. Moreover, an vitro tissue developed investigate detecting subtle signals avoiding interference with bioactivities. Furthermore, high-throughput biomonitoring platform built implements drug response cultural status cardiomyocytes. This work demonstrates applying for provides ideas design implantable devices.

Language: Английский

Citations

49
Functional microneedles for wearable electronics DOI Creative Commons
Xiaoxuan Zhang, Minhui Lu, Xinyue Cao

et al.

Smart Medicine, Journal Year: 2023, Volume and Issue: 2(1)

Published: Feb. 1, 2023

Abstract With an ideal comfort level, sensitivity, reliability, and user‐friendliness, wearable sensors are making great contributions to daily health care, nursing early disease discovery, body monitoring. Some imparted with hierarchical uneven microstructures, such as microneedle structures, which not only facilitate the access multiple bio‐analysts in human but also improve abilities detect feeble signals. In this paper, we present promising applications latest progress of functional microneedles sensors. We begin by discussing roles sensing units, including how signals captured, converted, transmitted. introduce microneedle‐like structures power depend on triboelectric or piezoelectric effects, etc. Finally, summarize cutting‐edge microneedle‐based biophysical signal monitoring biochemical analyte detection, provide critical thinking their future perspectives.

Language: Английский

Citations

36
Multifunctional Thermoelectric Temperature Sensor for Noncontact Information Transfer and Tactile Sensing in Human‐Machine Interaction DOI

Fu‐Lin Gao,

Min Peng, Ma Qian

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(1)

Published: Sept. 15, 2023

Abstract Using sensing devices for noncontact information transfer enhances data security in human‐machine interaction by eliminating direct contact between the carrier and communication interface. However, current contactless strategies struggle with complex application scenarios due to limitations mechanisms. Here, this work proposes an innovative approach that leverages invisible thermal radiation Seebeck effect, demonstrates its feasibility designing a high‐resolution temperature sensor based on laminar thermoelectric aerogel of carbon nanotube/PEDOT:PSS/nanocellulose. The exhibits exceptional sensitivity, ultralow detection limits (0.02 K), rapid response time, reliable cycling stability without interference from pressure stimuli. This further presents array‐based interface capable extracting, decoding, transmitting high‐capacity encrypted contactlessly. also serves as input terminal precisely monitoring finger movements. Additionally, can convert into resistance signals, functioning tactile electronic skin scenarios. study dependable strategy physical contact, contributing development future integrated devices.

Language: Английский

Citations

35
Flexible microfluidic triboelectric sensor for gesture recognition and information encoding DOI

Xiangchao Ge,

Zhenqiu Gao,

Liming Zhang

et al.

Nano Energy, Journal Year: 2023, Volume and Issue: 113, P. 108541 - 108541

Published: May 20, 2023

Language: Английский

Citations

32
Mass‐Producible 3D Hair Structure‐Editable Silk‐Based Electronic Skin for Multiscenario Signal Monitoring and Emergency Alarming System DOI

Dan Ge,

Qingling Mi,

Ruixin Gong

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(46)

Published: Aug. 4, 2023

Abstract Structurally tunable electronic skin (e‐skin) is beneficial for advancing wearable electronics, prosthetics, and human‐machine interaction (HMI). However, the regulation of e‐skin by traditional nanostructure technology complex expensive, moreover, nanostructure's poor deformability leads to small detection range low sensitivity. Herein, inspired structure skin‐hair insect burr, a polypyrrole‐silk/glycerol plasticized silk fibroin (P‐silk/RG) fabricated simple 3D biomimetic structural strategy reported. Benefitting from editability (length, position) this structure, P‐silk/RG has signal selectivity, long‐cilia demonstrates high sensitivity (respond weak signal‐airflow), while short‐cilia exhibits wide pressure (0.5–200 g) cycle stability (8000 compressions). Therefore, different forms are used in scenarios (long‐cilia monitoring breathing coughing motion disease diagnosis, pressure‐sensitive Morse code). Besides, good waterproof, editable conductive points easy device integration, providing basis underwater information transmission, multibit coded command output, early warning emergency sports accidents sedentary. Surprisingly, combining with textile weaving can be mass‐produced. Obviously, endows improved scene adaptability provide favorable way mass production.

Language: Английский

Citations

31
Self-Assembled Porous-Reinforcement Microstructure-Based Flexible Triboelectric Patch for Remote Healthcare DOI Creative Commons
Lei Hao,

Haifeng Ji,

Xiaohan Liu

et al.

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: April 18, 2023

Realizing real-time monitoring of physiological signals is vital for preventing and treating chronic diseases in elderly individuals. However, wearable sensors with low power consumption high sensitivity to both weak large mechanical stimuli remain challenges. Here, a flexible triboelectric patch (FTEP) based on porous-reinforcement microstructures remote health has been reported. The microstructure constructed by the self-assembly silicone rubber adhering porous framework PU sponge. properties FTEP can be regulated concentrations dilution. For pressure sensing, its effectively improved fivefold compared device solid dielectric layer, reaching 5.93 kPa-1 under range 0-5 kPa. In addition, wide detection up 50 kPa 0.21 kPa-1. makes ultra-sensitive external pressure, reinforcements endow greater deformation limit range. Finally, novel concept Internet Healthcare (IoH) system signal proposed, which could provide information ambulatory personalized healthcare monitoring.

Language: Английский

Citations

23