A low voltage-powered soft electromechanical stimulation patch for haptics feedback in human-machine interfaces

Qiu, Wenying; Zhong, Junwen; Jiang, Tao; Li, Zhaoyang; Yao, Archie Mingze; Shao, Zhichun; Cheng, Qilong; Liang, J. Nellie; Wang, Dongkai; Peng, Yande; He, Peisheng; Bogy, David B.; Zhang, Min; Wang, Xiaohao; Liu, Lin

doi:10.1016/j.bios.2021.113616

Cited by 16 publications

(8 citation statements)

References 42 publications

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“…As an application example, a virtual boxing game is integrated with the soft actuator to generate specific mechanical stimulations, which represent the actions of "Ineffective attack," "Normal attack," and "Double attack," and immersion experience. Compared with this work, our previous work 39 about sandwich-structured electret actuators is to obtain obvious tactile feedback at ultra-low driven voltage, regardless of the impact of the environment on the performance of the actuator. This work focuses on how the electret actuators can maintain high performances after suffering wet environments, even influenced by water soaking.…”

Section: ■ Conclusionmentioning

confidence: 95%

A Moisture-Resistant Soft Actuator with Low Driving Voltages for Haptic Stimulations in Virtual Games

Qiu

Li²,

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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Strong and robust stimulations to human skins with low driving voltages under high moisture working conditions are desirable for wearable haptic feedback applications. Here, a soft actuator based on the “air bubble” electret structure is developed to work in high-moisture environments and produce haptic sensations to human skin with low driving voltages. Experimentally, the water soaking and drying process has been conducted repeatedly for the first time and the 20th time to test the antimoisture ability of the actuator as it recovers its output force up 90 and 65% of the initial value, respectively. The threshold voltages for sensible haptic sensations for the fingertip and palm of volunteers have been characterized as 7 and 10 V, respectively. Furthermore, a demonstration example has been designed and conducted in a virtual boxing game to generate the designated haptic sensations according to the gaming conditions with an accuracy of 98% for more than 100 tests. As such, the design principle, performance characteristic, and demonstration example in this work could inspire various applications with improved reliability for wearable haptic devices.

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Section: ■ Conclusionmentioning

confidence: 95%

A Moisture-Resistant Soft Actuator with Low Driving Voltages for Haptic Stimulations in Virtual Games

Qiu

Li²,

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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“…[1][2][3][4] Among various human physical reactions, the sense of touch can be created by mechanically stimulating skins as part of the feedback mechanism for interactions between human and alloys, [32] pneumatic driven polymeric structures, [33,34] light responsive materials, [35,36] dielectric elastomers, [37][38][39] hydrogels, [40] piezoelectric materials, [41,42] and electrets. [43][44][45] These actuators have specific shortcomings to be further improved, such as the structural complexity, [30][31][32][33][34] inflexibility, [30,31,33] tethered power supply, [33,34] low performance, [35,36] or slow response time. [40] To produce efficient systems, the output characteristics such as force, displacement, and stability have been key research topics.…”

Section: Introductionmentioning

confidence: 99%

“…[40] To produce efficient systems, the output characteristics such as force, displacement, and stability have been key research topics. [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] For example, vibrotactile actuators based on the polydimethylsiloxane dielectric elastomer, poly(N-isopropylacrylamide)/polyaniline hydrogel, and fluorinated ethylene propylene electret film have achieved excellent stability and good output force. [44][45][46][47] Polyvinylidene difluoride and polyvinyl chloride gel-based actuators have delivered strong output force under relatively large preloads (>0.6 N).…”

Section: Introductionmentioning

confidence: 99%

“…[30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] For example, vibrotactile actuators based on the polydimethylsiloxane dielectric elastomer, poly(N-isopropylacrylamide)/polyaniline hydrogel, and fluorinated ethylene propylene electret film have achieved excellent stability and good output force. [44][45][46][47] Polyvinylidene difluoride and polyvinyl chloride gel-based actuators have delivered strong output force under relatively large preloads (>0.6 N). [48,49] However, these actuators have poor air permeability and require large preloads.…”

Section: Introductionmentioning

confidence: 99%

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Air Permeable Vibrotactile Actuators for Wearable Wireless Haptics

Li¹,

Zhang³

et al. 2022

Adv Funct Materials

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Vibrotactile actuators can evoke mechanical stimulations on human skins to induce haptic feedbacks for various human machine interaction applications. However, efforts toward their practical usages encounter several engineering challenges, including wearable comfortability and output abilities. Here, air permeable actuators are developed and embedded in common fabrics for vibrotactile actuation, achieving excellent air permeability of 108 L m −2 s −1 , low preload requirement of 10 mN, high output sensitivity of 0.2 mN/V, and good mechanical durability by surviving 11 million testing cycles. As demonstration examples, a wireless haptic feedback glove is shown to distinguish 32 different English characters and symbols with an overall accuracy of 97.8%, and large size actuators (10 × 10 cm 2 ) are also proved for providing haptic feedback for parts of human body. As such, the proposed system opens a new class of wearable vibrotactile actuators for potential applications in wide fields of metaverse, teleoperation, smart textiles, and robotics.

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“…[3][4][5] Among them, soft and stretchable electret, which is one dielectric material with quasi-permanent space charges or dipoles, is one of the most promising candidates. [6][7][8][9] To store charges or dipoles for a long time, electrets are commonly made of rigid dielectrics, and soft and stretchable dielectrics such as elastomers often are short-lived electrets, which means longevity and stretchability (softness) of electrets conflict.…”

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confidence: 99%

Smart polydimethylsiloxane sponges with high piezoelectric responses

2022

Polymer Engineering & Sci

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In recent years, soft and stretchable electrets have drawn considerable attention for their wide applications in energy harvesters, sensors, and actuators. However, existing electrets struggle to attain both longevity and stretchability (softness), which means charge retention capability and stretchability (softness) of electrets conflict. In this article, one novel soft and stretchable electret (PPSE) with great electromechanical performance is demonstrated. The PPSE is composed of a polydimethylsiloxane (PDMS) sponge and polytetrafluoroethylene (PTFE) particles. The uniformly distributed pores obtained by the sugar leaching method inside the PPSE can not only accumulate macroscopic dipoles but also provide great stretchability, flexibility, and softness for the material. The resulting PPSE has a large d33italiceff value up to 477 pC/N and great charge stability. Moreover, by the virtue of stretchability and softness, it can output electric signals from twisting, bending, and other mechanical interactions without breaking apart. With these great performances, PPSE will potentially enable applications for actuation, sensing, and energy harvesting.

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A low voltage-powered soft electromechanical stimulation patch for haptics feedback in human-machine interfaces

Cited by 16 publications

References 42 publications

A Moisture-Resistant Soft Actuator with Low Driving Voltages for Haptic Stimulations in Virtual Games

A Moisture-Resistant Soft Actuator with Low Driving Voltages for Haptic Stimulations in Virtual Games

Air Permeable Vibrotactile Actuators for Wearable Wireless Haptics

Smart polydimethylsiloxane sponges with high piezoelectric responses

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