Development of Compact Flexible Displacement Sensors Using Ultrasonic Sensor for Wearable Actuators

Akagi, Tetsuya; Dohta, Shujiro; Morimoto, Takafumi; Matsui, Yasuko; Shimooka, So

doi:10.1051/matecconf/20165102002

Cited by 4 publications

(1 citation statement)

References 12 publications

(11 reference statements)

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“…Wearable electronics are attracting broad interest owing to their potential applications in human–machine communication, − health monitoring, − self-diagnosis, − and electronic skins. − Many emerging electronic devices, including metal- or semiconductor-based conductors, have been developed as artificial wearable sensors. − The focus of the sensors lies on the rational fabrication of conductive materials, which is expected to show a stable and reliable electrical signal upon the external pressure or deformation. It should be noted that the electronic conductors are intrinsically not stretchable, which restricts their complete fulfillment of the sensing demand in practice as the human body would move in various forms, including bending, twisting, and folding.…”

Section: Introductionmentioning

confidence: 99%

Mechanically Robust, Antifatigue, and Temperature-Tolerant Nanocomposite Ionogels Enabled by Hydrogen Bonding as Wearable Sensors

Niu

Zhang

2022

ACS Appl. Polym. Mater.

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Flexible wearable sensors originating from ionogels have found extensive and significant applications in electronic skins, body-health monitoring, and personal healthcare diagnosis. Developing an ionogel-based sensor with robust mechanics and durable sensing in a wide service temperature range remains challenging. Herein, a high-performance wearable sensor with temperature-tolerant mechanics and durable sensing was constructed by virtue of hydrogen bonding between a poly(vinyl alcohol) (PVA)-incorporated nanocomposite interpenetrating network and an ionic liquid, i.e., 1-butyl-3-methylimidazolium iodide ([C 4 mim][I]). Through modulation of hydrogen bonding and thus good compatibility between [C 4 mim][I] and the network, the ionogels exhibited superior mechanics, excellent antifatigue, and durable sensing in a wide working temperature range. The ionogel-based wearable sensor exhibited stable and repeatable sensitivity toward various human motions including finger bending, elbow joint bending, and swallowing. More importantly, the pressure sensing can be completely preserved in a service temperature range of −20 to 80 °C. This work provided a feasible method to construct a mechanically strong, temperature-durable ionogel-based multimode sensor, which would find versatile applications as electronic skins, human-motion detection, and intelligent devices.

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Section: Introductionmentioning

confidence: 99%

Mechanically Robust, Antifatigue, and Temperature-Tolerant Nanocomposite Ionogels Enabled by Hydrogen Bonding as Wearable Sensors

Niu

Zhang

2022

ACS Appl. Polym. Mater.

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Toward Perceptive Soft Robots: Progress and Challenges

2018

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In the past few years, soft robotics has rapidly become an emerging research topic, opening new possibilities for addressing real‐world tasks. Perception can enable robots to effectively explore the unknown world, and interact safely with humans and the environment. Among all extero‐ and proprioception modalities, the detection of mechanical cues is vital, as with living beings. A variety of soft sensing technologies are available today, but there is still a gap to effectively utilize them in soft robots for practical applications. Here, the developments in soft robots with mechanical sensing are summarized to provide a comprehensive understanding of the state of the art in this field. Promising sensing technologies for mechanically perceptive soft robots are described, categorized, and their pros and cons are discussed. Strategies for designing soft sensors and criteria to evaluate their performance are outlined from the perspective of soft robotic applications. Challenges and trends in developing multimodal sensors, stretchable conductive materials and electronic interfaces, modeling techniques, and data interpretation for soft robotic sensing are highlighted. The knowledge gap and promising solutions toward perceptive soft robots are discussed and analyzed to provide a perspective in this field.

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Self‐Sensing Artificial‐Muscle‐Empowered Humanlike Perception, Interaction, and Positioning

Wu,

Li,

Wang

et al. 2024

Advanced Intelligent Systems

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Bioinspired soft and hybrid robots provide a promising solution to developing robots that can interact and collaborate with humans safely and effectively. Bellow‐like pneumatic artificial muscles can produce biological muscle‐like contraction with comparable response time and force output, but closed‐loop control has been a challenge without an effective length sensing solution. Herein, a self‐sensing artificial muscle (SSAM), which can sense its own length regardless of the external loadings and driving pressures, is proposed. Empowered by a seamlessly integrated mutual‐inductance‐based length sensor (MILS), the SSAM can sense its length change as small as 0.01 mm (0.012% of the initial liength 80 mm) in a wide range. The working principle of the MILS is analyzed theoretically to provide a design guideline. An SSAM‐based earthworm‐like locomotion robot is developed with the capability of knowing its real‐time body length change at different gaits. An artificial arm driven by one SSAM is also developed and demonstrated with humanlike capabilities of loading perception, interactive and responsive movements, and accurate positioning. This work provides a promising solution to develop muscle‐driven hybrid robotic systems with embodied intelligence for skilled manipulation and sophisticated human–machine interactions.

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Development of Compact Flexible Displacement Sensors Using Ultrasonic Sensor for Wearable Actuators

Cited by 4 publications

References 12 publications

Mechanically Robust, Antifatigue, and Temperature-Tolerant Nanocomposite Ionogels Enabled by Hydrogen Bonding as Wearable Sensors

Mechanically Robust, Antifatigue, and Temperature-Tolerant Nanocomposite Ionogels Enabled by Hydrogen Bonding as Wearable Sensors

Toward Perceptive Soft Robots: Progress and Challenges

Self‐Sensing Artificial‐Muscle‐Empowered Humanlike Perception, Interaction, and Positioning

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