A flexible ultra-highly sensitive capacitive pressure sensor for basketball motion monitoring

Gao, Huijie; Chen, Tiangeng

doi:10.1186/s11671-023-03783-y

Cited by 9 publications

(3 citation statements)

References 27 publications

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“…Exercise intensity monitoring plays a crucial role in sports training. [41,42] Here the efficiency of boxing can be evaluated by a 3D-SLMS mounted on a home-made punch bag (Figure 6e). The results of the phase angle changes in three different punching intensities are present in Figure 6f, with the amplitudes of phage angle changes reflecting the boxing forces reproducibly.…”

Section: Human Motion Detection By 3d-slms Technologymentioning

confidence: 99%

Wireless Human Motion Monitoring by a Wearable 3D Spiral Liquid Metal Sensor with a Spinning Top‐Shaped Structure

Qu,

Yan,

Liu

et al. 2023

Adv Materials Technologies

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Flexible wireless pressure sensors based on the LC resonance principle have emerged for critical applications in wearable devices. However, the challenge remains to promote the sensing performance while maintaining good wearability of the devices. Herein, a 3D spiral liquid metal sensor (3D‐SLMS) is reported with a spinning top‐shaped structure for wireless human motion detection. The device is composed of only liquid metals embedded in Ecoflex elastomer, thus being highly flexible. The study develops a unique method to fabricate 3D‐SLMS by integration of mask‐assisted spraying of liquid metals and virtual molding tuned by vacuum. Under an external load, the deformation of the spinning top‐shaped structure leads to changes in both inductance and capacitance, offering a detectable shift in the resonant frequency of the sensor. The 3D‐SLMS technology allows for a high sensitivity of −0.502 MHz N−1, a limit of detection as low as 0.71 mN, fast response time of 0.6 s, and stretchability up to 158% without device failure. As a proof‐of‐concept, the wireless pressure detection of various human motions such as arm bending, fisting, boxing, coughing, and flatfoot diagnosis is successfully implemented, thus promising translation of wearable electronics for sport monitoring and medical rehabilitation.

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Section: Human Motion Detection By 3d-slms Technologymentioning

confidence: 99%

Wireless Human Motion Monitoring by a Wearable 3D Spiral Liquid Metal Sensor with a Spinning Top‐Shaped Structure

Qu,

Yan,

Liu

et al. 2023

Adv Materials Technologies

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“…In recent years, with the advancement of sensor technology, tactile sensor technology has gradually emerged to mimic the sensing function of human skin. Flexible tactile sensors for force sensing can be divided into several types, such as piezoresistive [1][2][3], capacitive [4][5][6], piezoelectric [7][8][9], and optical sensors [10,11], according to the different conversion mechanisms between force and electrical signals. Each of these tactile sensors has different characteristics, and actual application scenarios require a flexible selection based on their advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

A Dual-Mode Pressure and Temperature Sensor

Chai,

Wang,

et al. 2024

Micromachines

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The emerging field of flexible tactile sensing systems, equipped with multi-physical tactile sensing capabilities, holds vast potential across diverse domains such as medical monitoring, robotics, and human–computer interaction. In response to the prevailing challenges associated with the limited integration and sensitivity of flexible tactile sensors, this paper introduces a versatile tactile sensing system capable of concurrently monitoring temperature and pressure. The temperature sensor employs carbon nanotube/graphene conductive paste as its sensitive material, while the pressure sensor integrates an ionic gel containing boron nitride as its sensitive layer. Through the application of cost-effective screen printing technology, we have successfully manufactured a flexible dual-mode sensor with exceptional performance, featuring high sensitivity (804.27 kPa−1), a broad response range (50 kPa), rapid response time (17 ms), and relaxation time (34 ms), alongside exceptional durability over 5000 cycles. Furthermore, the resistance temperature coefficient of the sensor within the temperature range of 12.5 °C to 93.7 °C is −0.17% °C−1. The designed flexible dual-mode tactile sensing system enables the real-time detection of pressure and temperature information, presenting an innovative approach to electronic skin with multi-physical tactile sensing capabilities.

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“…Recently, researchers have discovered the potential of near/in-sensor computing systems in edge computing and progress has been made in the flexibility of all components [39,40]. Due to their different working mechanisms, flexible sensors in system can be identified as piezoresistive, capacitive, piezoelectric or triboelectric sensors [41][42][43][44]. Filling a flexible medium layer with functional filler and depositing a film of functional materials on a flexible substrate are the two main methods of flexible material preparation.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Wearable Near-Sensor and In-Sensor Intelligent Perception Systems

Liu,

Wang,

Liu

et al. 2024

Sensors

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As the Internet of Things (IoT) becomes more widespread, wearable smart systems will begin to be used in a variety of applications in people’s daily lives, not only requiring the devices to have excellent flexibility and biocompatibility, but also taking into account redundant data and communication delays due to the use of a large number of sensors. Fortunately, the emerging paradigms of near-sensor and in-sensor computing, together with the proposal of flexible neuromorphic devices, provides a viable solution for the application of intelligent low-power wearable devices. Therefore, wearable smart systems based on new computing paradigms are of great research value. This review discusses the research status of a flexible five-sense sensing system based on near-sensor and in-sensor architectures, considering material design, structural design and circuit design. Furthermore, we summarize challenging problems that need to be solved and provide an outlook on the potential applications of intelligent wearable devices.

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A flexible ultra-highly sensitive capacitive pressure sensor for basketball motion monitoring

Cited by 9 publications

References 27 publications

Wireless Human Motion Monitoring by a Wearable 3D Spiral Liquid Metal Sensor with a Spinning Top‐Shaped Structure

Wireless Human Motion Monitoring by a Wearable 3D Spiral Liquid Metal Sensor with a Spinning Top‐Shaped Structure

A Dual-Mode Pressure and Temperature Sensor

Recent Progress in Wearable Near-Sensor and In-Sensor Intelligent Perception Systems

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