Triboelectric UV patterning for wearable one-terminal tactile sensor array to perceive dynamic contact motions

Jang, Jun‐Ho; Kim, Dong Wook; Lee, Ju Hyun; Choi, Chungryong; Go, Myeongcheol; Kim, Jin Kon; Jeong, Unyong

doi:10.1016/j.nanoen.2022.107320

Cited by 18 publications

(16 citation statements)

References 69 publications

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“…Recently, frequency-based sensors inspired by the human nerve spike trains have been attaining growing interest. 15,16 Those sensors are characterized by their high deformability (extreme bending or stretchability) for wearable or implantable uses. However, attaching rigid batteries or capacitors on the flexible sensors for sensing signal generation restrains their applications.…”

Section: Introductionmentioning

confidence: 99%

Self-powered ionic tactile sensors

et al. 2023

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Section: Introductionmentioning

confidence: 99%

Self-powered ionic tactile sensors

et al. 2023

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“…[23][24][25] Humans perceive tactile information together either with visual or auditory stimuli, which helps recognition of the applied simple tactile stimuli [26][27][28][29] and spatial information of surfaces. [30,31] However, effective technologies for providing visual or auditory information along with timely tactile stimuli have been relatively unexplored in the research for haptic interfaces. [32] It is highly expected that multisensory synchronized information can improve detection accuracy and response time during human-computer interactions.…”

Section: Introductionmentioning

confidence: 99%

Intrinsically Synchronized Flexible Visuo‐Haptic Device Operated by Single External Electric Field

Lee

Park

et al. 2023

Advanced Optical Materials

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A few studies have demonstrated a simultaneous supply of tactile stimulation with optical expression from separate device components. [32,37] However, intrinsic coupling of optical expression and tactile stimulation in a single device has never been achieved, which is mainly because the operating mechanisms of tactile stimulation and visual expression are completely different. Integrating the opto-tactile information in a single material by a single operation is advantageous for synchronized multisensory expression.To date, the dominant means for tactile sensory information has been generated by using mechanical actuators such as indentors, [38,39] motors, [40,41] and piezoelectric devices. [42,43] Mechanical tactile stimulation provides natural tactile sensations that can be applied to the skin; however, it requires a complicated device structure or bulky design. [1,17] Furthermore, those types of haptic actuators cannot present localized haptic sensations on the contact skin. For all these reasons, several haptic researches have introduced the concept of surface haptics. The goal of surface haptics is to generate tactile effects on touch surfaces. One of the technologies for surface haptics is electrovibration (EV). [44][45][46] In the EV, no haptic effect occurs on the surface when the finger (or any conductor) is not in contact, even though electrical input is applied. However, when human touches and slides the surface, an electrostatic attraction force is generated from the electroadhesion phenomenon between the contact finger and the surface; then, the human feels the modulated frictional force. Furthermore, when the alternating current (AC) input is applied to the surface, the frictional force fluctuates in the form of oscillating attributes. The dynamic frictional force can be felt as vibration, and those vibration effects are called electrovibration. Because EV occurs only while a conductor is in contact with the surface, the concept differs from the widely used mechanical tactile actuators. For tactile expression, EV has several advantages; 1) it does not require a bulky structured actuation mechanism, e.g., a vibration motor or linear resonance actuator (LRA), 2) it generates localized vibration to the contact finger on the surface.Despite the recent remarkable advances in EV, [47][48][49][50][51][52][53][54][55][56][57] general EV devices have been confined to a rigid property because of the thin glass layer. And they requested external optical devices for the simultaneous expression of optical and tactile information. Consequently, designing a flexible opto-haptic multimodality device with a simple structure is highly desirable for fruitful haptic interactions. In this study, we present a synchronized Providing multisensory expression in a synchronized form helps human perception in human-machine interfaces. Synchronized visuo-haptic integration has been relatively less explored because the two expressions operate by different principles. This study demonstrates a flexible visuo-haptic device that ge...

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“…[ 23 ] Simultaneously, the sensing units in the bionic fingertip e‐skin must have the ability to convert tangential friction into normal pressure, and a tiny normal pressure should be distinguished with a high sensitivity in a narrow pressure range to identify the texture and roughness of objects. [ 24 ] The tradeoff between the sensitivity and the detection range, and the pressure sensing of different directions are typical technical difficulties in the design of the sensor.…”

Section: Introductionmentioning

confidence: 99%

Tactile Recognition of Shape and Texture on the Same Substrate

Wen,

Nie,

Fan

et al. 2023

Advanced Intelligent Systems

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Due to the difficulties in designing sensor arrays with a wide detection range, high sensitivity, and the sensing ability to convert tangential force into normal force on the same substrate, the integration of shape and texture recognitions in one electronic skin (e‐skin) has not been realized so far. Herein, an e‐skin tactile‐sensing system is presented, based on resistive pressure‐sensing units (serving as Meissner corpuscles) unevenly distributed on a bionic hand‐shaped polyimide substrate, which can realize shape and texture recognitions concurrently. A multilayer microporous structure with different pores is designed and introduced into the sensor, which enables each sensing unit ultrahigh sensitivity and a wide detection range. Meanwhile, a customized micro‐pyramid array is developed and assembled to the sensor array, which realizes the transformation from tangential force to normal force. With the help of artificial intelligence technology, the recognition accuracy reaches 100% for 8 different shapes, and 99.7% for 10 different textures, respectively. The proposed design strategy enables compatible fabrication, simple signal processing, and convenient extension of bionic free‐shaped e‐skin, which paves a promising way for the popularization of e‐skin in large‐scale intelligent wearable fields.

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Triboelectric UV patterning for wearable one-terminal tactile sensor array to perceive dynamic contact motions

Cited by 18 publications

References 69 publications

Self-powered ionic tactile sensors

Self-powered ionic tactile sensors

Intrinsically Synchronized Flexible Visuo‐Haptic Device Operated by Single External Electric Field

Tactile Recognition of Shape and Texture on the Same Substrate

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