HapSense

Yoon, Sang Ho; Ma, Siyuan; Lee, Woo Suk; Thakurdesai, Shantanu; Sun, Di; Ribeiro, Flávio P.; Holbery, James D.

doi:10.1145/3332165.3347888

Cited by 30 publications

(8 citation statements)

References 50 publications

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“…Notably, the piezoelectric effect is linear, with actuation strain proportional to the applied electric field. Commonly employed piezoelectric polymers for actuators include poly(vinylidene fluoride) (PVDF) 104 and poly(vinylidene fluoride–trifluoroethylene) (P(VDF–TrFE)). 61…”

Section: Soft Tactile Actuatorsmentioning

confidence: 99%

Towards high performance and durable soft tactile actuators

Tan,

Wang,

Gao

et al. 2024

Chem. Soc. Rev.

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Section: Soft Tactile Actuatorsmentioning

confidence: 99%

Towards high performance and durable soft tactile actuators

Tan,

Wang,

Gao

et al. 2024

Chem. Soc. Rev.

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“…This actuation occurred due to a controlled Joule heating-induced operation mechanism that caused bending deformation with increasing applied voltages. Several research projects are focusing on these materials and taking advantage of their characteristics, not only as actuators [253], but also as sensors [254], and energy harvesters [255,256].…”

Section: Mechanical Actuatorsmentioning

confidence: 99%

“…Yoon et al also developed a sensor/actuator unit resorting, once again to PVDF-TrFe, intended to be used for HMI purposes. For this purpose, only printing technologies were employed, and the electrodes were made from screen-printed silver [254]. PVDF-TrFE-CFE is another co-polymer that can be used for low-frequency actuation of surfaces and displays [258].…”

Section: Haptic Interfacesmentioning

confidence: 99%

The role of printed electronics and related technologies in the development of smart connected products

Buga¹,

Viana²

2022

Flex. Print. Electron.

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The emergence of novel materials with flexible and stretchable characteristics, and the use of new processing technologies, have allowed for the development of new connected devices and applications. Using printed electronics, traditional electronic elements are being combined with flexible components and allowing for the development of new smart connected products. As a result, devices that are capable of sensing, actuating, and communicating remotely while being low-cost, lightweight, conformable, and easily customizable are already being developed. Combined with the expansion of the Internet of Things, artificial intelligence, and encryption algorithms, the overall attractiveness of these technologies has prompted new applications to appear in almost every sector. The exponential technological development is currently allowing for the “smartification” of cities, manufacturing, healthcare, agriculture, logistics, among others. In this review article, the steps towards this transition are approached, starting from the conceptualization of smart connected products and their main markets. The manufacturing technologies are then presented, with focus on printing-based ones, compatible with organic materials. Finally, each one of the printable components is presented and some applications are discussed.

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“…Even though these haptic I/O modules with less thickness exhibit large deformation, they require a complex fabrication process (which includes a pre-stretching process, multi-stacking process, and deposition of the stretchable electrode) and rigid frames. Another method for developing bidirectional haptic I/O modules is using piezoelectric polymers [19,20]. Piezoelectric polymer-based haptic I/O modules detect dynamic pressure and have high energy efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Piezoelectric polymer-based haptic I/O modules detect dynamic pressure and have high energy efficiency. However, they can hardly detect static pressure [19] and require a complex fabrication process (for example, a multi-stacking process) and stretchable electrodes [20]. Therefore, we require a new material that does not require a complex manufacturing process and stretchable electrodes for a thin and soft single volume bidirectional haptic I/O module (haptic actuator module with a haptic static/dynamic sensing function).…”

Section: Introductionmentioning

confidence: 99%

Soft bidirectional haptic I/O module based on bi-convex patterned PVC gel

Choi¹,

Jeong²,

Lee³

et al. 2021

Smart Mater. Struct.

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In this paper, we propose a bidirectional soft haptic I/O module that not only senses the haptic force but also generates a mechanical vibrotactile sensation. Under external pressure, the distance between the moving plate and lower electrode layer decreases, and the bi-convex patterned poly vinyl chloride (bpPVC) gel gets compressed. These two motions make the capacitance of the proposed module change. Moreover, the application of external electric field (EF) creates an electrostatic force between the upper and lower electrode layers and generates the electric-field-induced deformation of the bpPVC gel simultaneously. As soon as the external EF disappears, the proposed module regains its original shape through the elastic restoring forces of the bpPVC gel and planar springs. Therefore, the applied AC voltage makes the proposed module vibrate. The dielectric and mechanical properties of the bpPVC gel are measured to investigate the optimal weight ratio of the PVC and plasticizers. Experiments are conducted to measure the haptic sensing and actuating performance of the proposed method. The capacitance of the proposed haptic I/O module increases from 17.4 pF to 54.8 pF when the external pressure varied from 0 kPa to 100 kPa. On the other hand, the haptic output of the proposed I/O module is observed as 0.81g (g = 9.8 m s−2) at 100 Hz. The results clearly indicate that the proposed haptic I/O module not only senses the static and dynamic pressure but also controls the amplitude of vibrotactile sensation. Owing to its mechanically soft structure, we expect that the proposed haptic I/O module has the potential to be applied or attached to various flexible/soft devices or the human body.

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HapSense

Cited by 30 publications

References 50 publications

Towards high performance and durable soft tactile actuators

Towards high performance and durable soft tactile actuators

The role of printed electronics and related technologies in the development of smart connected products

Soft bidirectional haptic I/O module based on bi-convex patterned PVC gel

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