A wide-linear-range and low-hysteresis resistive strain sensor made of double-threaded conductive yarn for human movement detection

Huang, Fei; Hu, Jiyong; Xiong, Yan

doi:10.1016/j.jmst.2023.06.047

Cited by 19 publications

(4 citation statements)

References 39 publications

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“…Therefore, it can be linked to a low-voltage driver or low-precision signal collector, and has lower signal processing accuracy requirements and larger error tolerance space, which proves the excellent applicability and reliability of PCCT. Comparing the PCCT with other schemes in the articles, the two parameters that GF in the common strain response interval of 0–100% and the approximate cost of the active filler were used as the judging indexes, respectively, and the obtained results are shown in Figure b, which shows that the PCCT achieves an excellent performance over most of the schemes based on a lower cost, proving the validity and significance of our work. ,,,,− Importantly, optimizing the encapsulation process or materials to reduce the interference of the encapsulation layer with the conductivity of the sensitive element can further improve the sensing performance of the device and extend the benefits of the polarity-induced mechanism.…”

Section: Resultsmentioning

confidence: 55%

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Polydopamine/Carbon Black/Carbon Nanofiber/Thermoplastic Polyurethane Composite Nanofiber Strain Sensor with Ultrahigh Loading Rate for Human Activity Monitoring

Gao,

Wang,

Mao

et al. 2024

ACS Appl. Nano Mater.

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Developing flexible wearable strain sensors that combine high performance and cost-effectiveness remains a challenge. We proposed the polarity-induced adsorption theory based on the like dissolves like principle, which can dramatically increase the loading rate of carbon nanomaterials on TPU electrospun nanofiber substrates, and constructed flexible PDA/ CB/CNF/TPU strain sensors (PCCT) with dual-mode threedimensional nanobrush-bridging structures of binary carbon-based active filler through the introduction of a binary mixed dispersant system. The trend of similar effects on the loading rate and sheet resistance present for a variety of systems proves the objective existence and applicability of the polarity-induced adsorption theory, and then, the microscopic mechanism of action of the model is analyzed and explained. The optimization scheme summarized on this basis resulted in a PCCT with an ultrahigh carbon nanomaterial loading rate of 59.5% and an ultralow sheet resistance of 68.5 Ω/sq, which enabled the constructed high-density threedimensional conductive network with synergistic double-bridging structures to demonstrate a full-stretch range of responsiveness (0.12−285%) and high sensitivity (GF = 25.5 (0−100%), 84.3 (100−200%) and 312.4 (200−285%)), realizing the performance enhancement of low-cost devices. Finally, testing of the response to different levels of strain including human joint movements and muscle movements such as blinking proved the practical value and wide range of applications of PCCT in the field of human monitoring.

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Section: Resultsmentioning

confidence: 55%

“…(a) Relative change of resistance of PCCT with effect of tensile strain. (b) Comparison of data for PCCT with schemes from other articles. ,,,,− (c) Response time and recovery times of PCCT. (d) Effect of tensile velocity on the response stability of PCCT.…”

Section: Resultsmentioning

confidence: 99%

Polydopamine/Carbon Black/Carbon Nanofiber/Thermoplastic Polyurethane Composite Nanofiber Strain Sensor with Ultrahigh Loading Rate for Human Activity Monitoring

Gao,

Wang,

Mao

et al. 2024

ACS Appl. Nano Mater.

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“…Figure 5F shows data for some strain sensors reported in previous literature. [32][33][34][35][36][37][38][39][40][41] It can be seen that they have narrow sensing ranges and/or low GFs. Herein, we have achieved a desirable integration of a large strain range and high GF (GF = 51.7 at a strain of 400% in the reversible regime), permitting broad application, especially in large-scale human motion detection.…”

Section: Sensing Performancementioning

confidence: 99%

“…The conductive pathways gradually broke, leading to a rapid increase in resistance until the yarn eventually fractures. Figure 5B illustrates the [32][33][34][35][36][37][38][39][40][41] equivalent circuit diagrams, which involve numerous parallel resistances arising from the breakage of the conductive network of CNTs. During the stretching process, failure of parallel circuits occurred continually, that is, the disconnection of CNT conductive paths occurred, resulting in an increase in circuit resistance (also seen in Figure 4A).…”

Section: Sensing Performancementioning

confidence: 99%

Strain sensor based on polyurethane/carbon nanotube elastic conductive spiral yarn with high strain range and sensitivity

Nie,

Chen,

Tang

et al. 2024

Polymer Composites

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Wearable flexible electronic strain sensor devices have gained significant attention in recent years due to their potential for detecting human motion in various scenarios. However, the development of strain sensors with high sensitivity across a wide range of strains remains a major challenge. We present herein a novel strain sensor based on a graded structure thermoplastic polyurethane (TPU)/carbon nanotube (CNT) composite yarn with significantly enhanced mechanical performance imparted by the designed structure. The twisted CNTs/TPU spiral yarn demonstrated a fracture elongation of up to 1066% while maintaining charge conductivity under high‐strain conditions. Moreover, it exhibited sensitive changes in resistance versus tensile strain, excellent repeatability, and stability. As a strain sensor, it achieved a gauge factor (GF) of 67.2 within a strain range below 50%, reaching 51.7 in a strain range exceeding 150%. With a fast response time of 0.12 s, it enabled accurate identification of movements in different body parts. These findings highlight the broad application potential of the designed spiral yarn strain sensor in areas such as human motion monitoring and human–computer interaction.Highlights Prepares a flexible strain sensor with graded‐structure (CNT‐fiber‐yarn). Shows high sensitivity and a wide strain response range Reveals the conductive model of strain sensor.

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Progresses and Perspectives of 1D Soft Sensing Devices for Healthcare Applications

Kim,

Lee

et al. 2024

Adv Funct Materials

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Healthcare sensing devices enable continuous monitoring of diverse biosignals, such as respiration, heartbeat, temperature, inflammation, Electroencephalogram (EEG), and biomechanical movement, contributing to the management of health conditions and early diagnosis of diseases. However, clinically available tools have several limitations for real‐time measurement of biosignals in non‐hospital environments owing to their cumbersome, complex designs, and rigidity. To address these limitations, there has been a growing body of research that explores flexible and soft electronics for healthcare applications, which feature high mechanical compliance and adaptability. Especially, sensing devices based on fiber structures have attracted significant attention due to high flexibility, lightweight design, effective workspace and unique structural adaptability. Moreover, 1D sensing devices can be seamlessly integrated into garments and the human body with complex structures without any unconformity. In this perspective, The fabrication and electrical functionalization of fiber substrates and focus on recent advances in various fiber‐based sensing systems for strain, pressure, temperature, pH, biomarkers, and neural activity is explored. Additionally, biodegradable fiber‐based sensing devices as future healthcare technologies are briefly discussed. Finally, this article provides a summary and outlook on the remaining challenges for current fiber‐based sensing devices.

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A wide-linear-range and low-hysteresis resistive strain sensor made of double-threaded conductive yarn for human movement detection

Cited by 19 publications

References 39 publications

Polydopamine/Carbon Black/Carbon Nanofiber/Thermoplastic Polyurethane Composite Nanofiber Strain Sensor with Ultrahigh Loading Rate for Human Activity Monitoring

Polydopamine/Carbon Black/Carbon Nanofiber/Thermoplastic Polyurethane Composite Nanofiber Strain Sensor with Ultrahigh Loading Rate for Human Activity Monitoring

Strain sensor based on polyurethane/carbon nanotube elastic conductive spiral yarn with high strain range and sensitivity

Progresses and Perspectives of 1D Soft Sensing Devices for Healthcare Applications

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