Soft and flexible large-strain piezoresistive sensors: On implementing proprioception, object classification and curvature estimation systems in adaptive, human-like robot hands

Yong, Shi; Chapman, Jayden; Aw, Kean C.

doi:10.1016/j.sna.2022.113609

Cited by 18 publications

(10 citation statements)

References 38 publications

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“…77,78 One central area of demand for SFPSs is in the field of wearable technology, as these sensors are often used in fitness tracking devices and other wearable devices to measure various parameters such as heart rate, respiration rate, and physical activity such as in human health monitoring and sports activity. 27,29,[79][80][81][82] Other demanding areas for SFPSs include medical devices and surgery, 83 industrial sensors, 84 underwater applications, 85 military 86 and aerospace applications, 87 and even space exploration. 88 Apart from this, their demand in robotics is to measure forces and pressures in various applications, such as robot arms or machine tools, in industrial settings.…”

Section: R ¼mentioning

confidence: 99%

“…Nanomaterials may be found in thin films, nanorods/nanowires, or nanodots. The carbon allotropes utilized in the fabrication of the SFPSs are CB, 27,30,219,220 CNTs, 101 and graphene. 26,50,152,221 Carbon-reinforced composite (CRC) based sensors have the advantage of ease of manufacturing and repeatability.…”

Section: Carbon Allotropesmentioning

confidence: 99%

“…They are fabricated using stretchable and flexible materials, allowing them to be deformed or bent without breaking or losing their ability to function. These sensors are designed to measure pressure, force, strain, bend, or twist in different applications, such as healthcare, 22,23 human motion detection, [24][25][26] human-robot interaction, 27,28 automation, 29,30 and soft robotics. [31][32][33] The stretchable and flexible sensors have an advantage in closeness to the human skin, softness, stretching, flexibility, and adaptability to complex surfaces; in some cases, even pigmentation has been provided to the elastomer material.…”

Section: Introductionmentioning

confidence: 99%

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Recent developments in stretchable and flexible tactile sensors towards piezoresistive systems: A review

Saxena,

Patra

2023

Polymers for Advanced Techs

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Stretchable and flexible piezoresistive sensors (SFPSs) can detect mechanical stimuli in terms of electrical response and provide adaptability to use with complex surfaces, whether stationary or moving. Its stretchable and flexible nature makes it ideal for detecting large strains, localized pressure, bending, and twisting. SFPSs can detect pressure and strain in a broad range. SFPSs have ease of manufacturing, high sensitivity, better durability, easy processing, and economic development. These qualities of SFPSs can open a wide range of application possibilities, such as healthcare, human motion detection, a safe environment to interact with robots, automation, and soft robotics. The discussion in this article starts from the sensing mechanism, design development over the years, a variety of materials used for substrates and to provide conductivity to the sensors, fabrication processes explored and developed, enhancement in the performance characteristics, to have future directions. Over the last decades, exponential development has occurred in SFPSs systems based on design mechanisms, materials used, and fabrication techniques, even though several technological and design challenges remain undetermined and bear decisive interdisciplinary intervention to address them.

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Section: R ¼mentioning

confidence: 99%

Section: Carbon Allotropesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recent developments in stretchable and flexible tactile sensors towards piezoresistive systems: A review

Saxena,

Patra

2023

Polymers for Advanced Techs

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“…20−23 Voice signals contain rich character information on humans and are easy to use, so people can use voice signals to make and realize accurate commands. At present, the main sensors currently used for speech recognition are capacitive sensors, 24,25 piezoresistive sensors, 26,27 piezoelectric sensors, 28−30 and triboelectric sensors. 31−33 However, some components in capacitive and piezoresistive sensors, such as conventional commercial microphones, rely on battery charging and are vulnerable to environmental noise.…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, there are two main methods of human–machine interaction: voice–machine interaction − and gesture–machine interaction. − Voice signals contain rich character information on humans and are easy to use, so people can use voice signals to make and realize accurate commands. At present, the main sensors currently used for speech recognition are capacitive sensors, , piezoresistive sensors, , piezoelectric sensors, − and triboelectric sensors. − However, some components in capacitive and piezoresistive sensors, such as conventional commercial microphones, rely on battery charging and are vulnerable to environmental noise. On the other hand, piezoelectric sensors have complex structures, troublesome manufacturing process and short working frequency ranges.…”

Section: Introductionmentioning

confidence: 99%

Human–Machine Interaction via Dual Modes of Voice and Gesture Enabled by Triboelectric Nanogenerator and Machine Learning

Luo

Yang

et al. 2023

ACS Appl. Mater. Interfaces

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With the development of science and technology, human− machine interaction has brought great benefits to the society. Here, we design a voice and gesture signal translator (VGST), which can translate natural actions into electrical signals and realize efficient communication in human−machine interface. By spraying silk protein on the copper of the device, the VGST can achieve improved output and a wide frequency response of 20−2000 Hz with a high sensitivity of 167 mV/dB, and the resolution of frequency detection can reach 0.1 Hz. By designing its internal structure, its resonant frequency and output voltage can be adjusted. The VGST can be used as a high-fidelity platform to effectively recover recorded music and can also be combined with machine learning algorithms to realize the function of speech recognition with a high accuracy rate of 97%. It also has good antinoise performance to recognize speech correctly even in noisy environments. Meanwhile, in gesture recognition, the triboelectric translator is able to recognize simple hand gestures and to judge the distance between hand and the VGST based on the principle of electrostatic induction. This work demonstrates that triboelectric nanogenerator (TENG) technology can have great application prospects and significant advantages in human−machine interaction and high-fidelity platforms.

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A stretchable flexible strain sensor with high sensitivity and fast response fabricated by embedded 3D printing of the hybrid polydimethylsiloxane/conductive carbon paste composites

Xiao,

Li,

et al. 2024

J of Applied Polymer Sci

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Flexible strain sensors are widely used in the fields of human motion monitoring, electronic skin, and soft robotics. In this work, to satisfy the demand for high‐sensitivity, low‐cost, and fast‐response flexible strain sensors for these fields, embedded 3D printing (E‐3DP) technology is employed to fabricate highly sensitive and fast‐responding flexible strain sensors. The effects of conductive carbon paste concentration and printing process parameters by establishing the E‐3DP system on the piezoresistive behavior of the sensor were investigated. The results show that the gauge factor of the strain sensor is about 36.1 and 247.67, under the strain of 0%–40% and 40%–45%, respectively. Its response/recovery time is about 250/350 ms. On this basis, the sensor can also accurately sense and distinguish the motion in distinct parts of the human body, demonstrating that the flexible strain sensor manufactured by the method possesses the potential to be widely used in the fields of human motion monitoring, electronic skin, and soft robotics.

show abstract

Soft and flexible large-strain piezoresistive sensors: On implementing proprioception, object classification and curvature estimation systems in adaptive, human-like robot hands

Cited by 18 publications

References 38 publications

Recent developments in stretchable and flexible tactile sensors towards piezoresistive systems: A review

Recent developments in stretchable and flexible tactile sensors towards piezoresistive systems: A review

Human–Machine Interaction via Dual Modes of Voice and Gesture Enabled by Triboelectric Nanogenerator and Machine Learning

A stretchable flexible strain sensor with high sensitivity and fast response fabricated by embedded 3D printing of the hybrid polydimethylsiloxane/conductive carbon paste composites

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