A Triboelectric Nanogenerator‐Based Smart Insole for Multifunctional Gait Monitoring

Lin, Zhangxi; Wu, Zhiyi; Zhang, Binbin; Wang, Yi Cheng; Guo, Hengyu; Liu, Guanlin; Chen, Chao‐Yu; Chen, Yuliang; Yang, Jin; Wang, Zhong Lin

doi:10.1002/admt.201800360

Cited by 199 publications

(126 citation statements)

References 33 publications

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“…On the other hand, IoTs also expects the sensors can continuously work for long hours without maintenance. [31][32][33] Based on the TENG, a real multifunctional sensor enabled by magnetically regulated TENG has the capacity to measure motion parameters, including acceleration, speed, and direction of rotary and linear motions. They have demonstrated to be an applicable solution for both self-powered sensing and energy harvesting.…”

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confidence: 99%

“…They have demonstrated to be an applicable solution for both self-powered sensing and energy harvesting. [31][32][33] Based on the TENG, a real multifunctional sensor enabled by magnetically regulated TENG has the capacity to measure motion parameters, including acceleration, speed, and direction of rotary and linear motions. And the TENG also has been successfully used to build multifunctional sensors.…”

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confidence: 99%

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Multifunctional Sensor Based on Translational‐Rotary Triboelectric Nanogenerator

Zhang

Zou

et al. 2019

Advanced Energy Materials

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108

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to the current multifunctional sensors. On the other hand, IoTs also expects the sensors can continuously work for long hours without maintenance. [10] The energy harvesting technologies that can provide continuous power supply [11][12][13][14][15][16] and selfpowered sensors that can directly transfer the detect information into electrical signals even without power [7,17,18] are the idea approaches to meet the requirements.Based on the triboelectric effect and the electrostatic induction, triboelectric nanogenerators (TENGs) invented by Wang and co-workers [19] have a few remarkable advantages, such as flexibility, light weight, easy integration. They have demonstrated to be an applicable solution for both self-powered sensing and energy harvesting. [20][21][22][23] Specifically, the force, [24] speed, [25,26] acceleration, [27,28] direction, [29] and angle [30] all can be measured by the TENG. And the TENG also has been successfully used to build multifunctional sensors. [31][32][33] Based on the TENG, a real multifunctional sensor enabled by magnetically regulated TENG has the capacity to measure motion parameters, including acceleration, speed, and direction of rotary and linear motions. [33] Unfortuately, six output channels increace the complexity of the sensor and the surface contact friction limits its sensitivity. Moreover, for enhancing the output performance of the TENG, many works are focused on the selection and the surface nanocrystallization of friction materials, which both are relatead to the triboelectric effect. [34][35][36] However, about the electrostatic induction, there also need some theoretical guidances of the electrode materials selection.In this paper, inspired by the movement statement of a magnetic cylinder placed beside a fixed magnetic cylinder, a cylindrical self-powered multifunctional sensor (MS) with a translational-rotary magnetic mechanism is presented, which is capable of detecting acceleration, force, and rotational parameters. The MS is composed of a translational-rotary magnetic mechanism, a TENG module, and an acrylic shell. The translational-rotary magnetic mechanism is a low damping magnetic cylinder (MC) rotating around a fixed circular tube, which is embedded by a magnetic disk (MD). The sensitivity of the MS can be adjusted by changing the distance between two magnets. The TENG module consists of the MC and a friction layer that is a polytetrafluorethylene (PTFE) film with two interdigitated electrodes (IEs) bonded on the surface of the tube. The MS can transform a translational motion into a swing motion or a Triboelectric nanogenerators with a large number of desirable advantages, such as flexibility, light weight, and easy integration, are unique for sensor design. In this paper, based on the triboelectric nanogenerator (TENG), a cylindrical self-powered multifunctional sensor (MS) with a translationalrotary magnetic mechanism is proposed, which has the capacity to detect acceleration, force, and rotational parameters. The MS can transform a translational motion...

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confidence: 99%

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confidence: 99%

Multifunctional Sensor Based on Translational‐Rotary Triboelectric Nanogenerator

Zhang

Zou

et al. 2019

Advanced Energy Materials

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108

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“…In addition to the intelligent control, the indirectly wearable TENGs can also be integrated with insole and medical mask as an active sensor for monitoring human gait and respiration patterns in real time. Lin et al developed a TENG based smart insole for monitoring human gait in real time (Figure b) . The sensor integrated with the conventional insole convert mechanical triggering/impact into electrical signal, including two parts: a TENG part and an elastic air chamber (EAC) part.…”

Section: Wearable Tengsmentioning

confidence: 99%

Wearable and Implantable Triboelectric Nanogenerators

Liu

Shi

et al. 2019

Adv Funct Materials

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338

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Triboelectric nanogenerators (TENGs) are a promising technology to convert mechanical energy to electrical energy based on coupled triboelectrification and electrostatic induction. With the rapid development of functional materials and manufacturing techniques, wearable and implantable TENGs have evolved into playing important roles in clinic and daily life from in vitro to in vivo. These flexible and light membrane-like devices have the potential to be a new power supply or sensor element, to meet the special requirements for portable electronics, promoting innovation in electronic devices. In this review, the recent advances in wearable and implantable TENGs as sustainable power sources or selfpowered sensors are reviewed. In addition, the remaining challenges and future possible improvements of wearable and implantable TENG-based self-powered systems are discussed.

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“…[188,189] Zhong Lin Wang fabricated a wearable TENG-based smart insole that can be applied for real-time multifunctional gait monitoring. [190] The TENG-based insole consists of two novel air-pressure-driven structural designed sensors located in the front and rear of the insole. As shown in Figure 13f, each triboelectric sensor is composed of a convex TENG part on the top and an elastic air chamber (EAC) part.…”

Section: Gait Monitoringmentioning

confidence: 99%

Flexible Pressure Sensors for Biomedical Applications: From Ex Vivo to In Vivo

Zheng

Chen

et al. 2020

Adv Materials Inter

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As an important branch of flexible electronics, flexible pressure sensors that combine unique advantages including light weight, flexibility, and low‐cost, have drawn extensive attention owing to their great potential for biomedical applications. In this review, the current state‐of‐the‐art flexible pressure sensors concerning common substrate and active materials, sensing mechanism, key parameters, sensitivity optimization strategies, and promising biomedical applications from ex vivo to in vivo and which results in the distinct requirements of materials and structure design is briefly reviewed. Finally, perspectives on the potential challenges of flexible pressure sensors are provided.

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A Triboelectric Nanogenerator‐Based Smart Insole for Multifunctional Gait Monitoring

Cited by 199 publications

References 33 publications

Multifunctional Sensor Based on Translational‐Rotary Triboelectric Nanogenerator

Multifunctional Sensor Based on Translational‐Rotary Triboelectric Nanogenerator

Wearable and Implantable Triboelectric Nanogenerators

Flexible Pressure Sensors for Biomedical Applications: From Ex Vivo to In Vivo

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