Pomegranate-Inspired Biomimetic Pressure Sensor Arrays With a Wide Range and High Linear Sensitivity for Human–Machine Interaction

Long, Yunfeng; Xia, Sheng-Yuan; Huang, Zhengyong; Li, Chang-Heng; He, Gang; Ma, Xinyu; Liang, X W; Li, Jian

doi:10.1109/ted.2022.3146108

Cited by 12 publications

(4 citation statements)

References 50 publications

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“…At present, the main solutions for improving the sensitivity of flexible sensors include constructing microstructures of elastomers, adopting new composite active materials, and manufacturing porous elastic materials. Among them, there are various microstructures that can be constructed, such as pyramid, [11][12][13][14][15][16] micropillar, [17][18][19] two-level micropillar, [20] crack, [21] fold, [22] microsphere, [23][24][25][26] fabric, [27,28] sandpaper, [29][30][31] biomimetic, [32][33][34] and other microstructures. The presence of these microstructures can greatly improve the sensitivity of sensors.…”

Section: Introductionmentioning

confidence: 99%

A Flexible Pressure Sensor with Wide Detection Range Based on Capacitive‐Piezoresistive Dual Mode Conversion for Human‐Machine Interaction

Huang,

Wang,

Zhang

et al. 2024

Adv Materials Technologies

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Flexible pressure sensor is widely used in fields such as healthcare, intelligent prosthetics, and patient rehabilitation. However, how to ensure high sensitivity of the sensor while having a wide detection range remains a challenge. In order to address this challenge, a flexible pressure sensor with a wide detection range based on capacitive‐piezoresistive dual mode conversion is proposed. By manufacturing circular through‐holes on the dielectric layer of the sensor, the microstructure of the upper and lower electrode layers can achieve non‐contact and contact switching under different pressures through the through holes. This means that the sensor remains in capacitive mode at low pressure and then in piezoresistive mode at high pressure. By cleverly combining the two modes, the measurement range can reach 2 000 kPa and high sensitivity can be maintained during mode switching. In addition, its production process is simple, the cost is low, and it has a fast response time (120 ms) and good repeatability stability. The experimental results indicate that the sensor can achieve ideal performance in proximity detection, human behavior monitoring, and ultra high‐pressure detection, and has broad application prospects in providing a more powerful human‐computer interaction interface and expanding more comprehensive health monitoring.

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Section: Introductionmentioning

confidence: 99%

A Flexible Pressure Sensor with Wide Detection Range Based on Capacitive‐Piezoresistive Dual Mode Conversion for Human‐Machine Interaction

Huang,

Wang,

Zhang

et al. 2024

Adv Materials Technologies

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“…During an automobile collision, the active arms of a dummy can be characterized as a nonlinear dynamic system. When exposed to uncertain external disturbances, the precision of the endpoint position of the arm may deviate considerably [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Design for the active arm system in automotive collision-test dummies

Kai,

Yongqiang,

Hanxiao

2024

Fourth International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2024)

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“…Su et al reported a flexible piezoresistive sensor that can recognize laryngeal voice signals and external sounds . Based on a flexible piezoresistive sensor array, Long et al constructed an interactive control system for robotic arms . However, due to frequent bending during operation, flexible piezoresistive sensors often face the problem of failure .…”

mentioning

confidence: 99%

“…9 Based on a flexible piezoresistive sensor array, Long et al constructed an interactive control system for robotic arms. 10 However, due to frequent bending during operation, flexible piezoresistive sensors often face the problem of failure. 11 The most common form of failure mode in flexible sensors is that the flexible electrodes used for electrical interconnection crack or even break during the continuous bending process, 12,13 causing the sensor to be unable to output the sensing signal.…”

mentioning

confidence: 99%

A Multielectrode Layout for High Reliability of Flexible Piezoresistive Sensor: One Stimulus Signal to Three Sensing Signals

Yi,

Wang,

Zhao

et al. 2024

ACS Sens.

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Flexible sensors have developed rapidly due to their great application potential in the intelligent era. However, the frequent bending work requirements pose a serious challenge to the mechanical reliability of flexible sensors. Herein, a strategy of using a new multielectrode layout to achieve multiple sensing signals based on one external signal is proposed for the first time to improve the reliability of flexible piezoresistive sensors. The multielectrode layout consists of a pair of interdigital electrodes and a bottom electrode. The interdigitated electrodes are used to sense the change in the surface resistance of the sensor, and the interdigital electrodes and the bottom electrode are used to sense the change in the bulk resistance of the sensor. As a result, without increasing the sensing unit area, the electrode layout allows the sensor to generate three response electrical signals when sensing an external pressure, thus improving the reliability of the sensor. Based on the electrode layout, a highly reliable flexible piezoresistive sensor with a multilevel porous structure is obtained by a microwave foaming method with a template. In the working state of sensing surface resistance, the sensor has a 22.12 kPa −1 sensitivity. Meanwhile, in the working state of sensing bulk resistance, the sensor shows a 55.17 kPa −1 sensitivity. Furthermore, the sensor is applied to monitor human pulse and speech signals, demonstrating its multisignal output characteristics and potential applications in flexible electronics. In conclusion, the new strategy of using the proposed electrode layout to improve the reliability of flexible sensors is expected to greatly promote the practical application of flexible electronics.

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Pomegranate-Inspired Biomimetic Pressure Sensor Arrays With a Wide Range and High Linear Sensitivity for Human–Machine Interaction

Cited by 12 publications

References 50 publications

A Flexible Pressure Sensor with Wide Detection Range Based on Capacitive‐Piezoresistive Dual Mode Conversion for Human‐Machine Interaction

A Flexible Pressure Sensor with Wide Detection Range Based on Capacitive‐Piezoresistive Dual Mode Conversion for Human‐Machine Interaction

Design for the active arm system in automotive collision-test dummies

A Multielectrode Layout for High Reliability of Flexible Piezoresistive Sensor: One Stimulus Signal to Three Sensing Signals

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