Recent Development of Dielectric Elastomer Transducers and Potential Applications

Chiba, Seiki; Waki, Mikio

doi:10.4236/epe.2023.152005

Cited by 2 publications

(10 citation statements)

References 48 publications

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“…Using a hand-held SWCNT sprayer, the electrodes can be applied very carefully, allowing the creation of very thin electrodes while remaining conductive. (Chiba et al, 2023). As shown in Fig.…”

Section: Discussionmentioning

confidence: 82%

“…With this human-robotic interaction system shown above, a physician can possibly use a virtual system to palpate a patient when the patient is at a remote location (Chiba et al, 2023). In addition, in the assembly of a machine, when performing a detailed and sensitive assembly, it might be possible for a robot to do such work alone someday, although it still requires a skilled human at present.…”

Section: Discussionmentioning

confidence: 99%

“…Also, it is necessary to move the patient's fingers with external force during rehabilitation, but until now, the DEA has not been able to handle this sufficiently due to its low output. However, in 2021, the DEA device developed by Chiba et al was successfully drove an 8kgf weight in 88ms with a DE of 0.15g (Chiba et al, 2023, Chiba et al, 2021. If this DEA device could be used, it would be possible to realize such a rehabilitation system without any problems.…”

Section: Discussionmentioning

confidence: 99%

“…Electrode materials, electrode attachment methods, elastomer improvements, electrical circuits, and other related technologies are being developed as DE/DES components. In order to produce flexible electrodes, the materials used for them include metal foil (including liquid metal), carbon grease, carbon particles (e.g., carbon black), carbon nanotubes (CNT), and conductive polymers (Zhang et al, 2019, Chiba et al, 2023. If a larger electrode deformation is required, it is better to use highly conductive CNTs (especially single-wall CNTs) (Chiba et al, 2020).…”

Section: Figure 1 Structure and Principle Of Desmentioning

confidence: 99%

“…The DEA had an outer diameter of 6 mm, and the elastomer used was 3M/4905. Electrodes were made by spraying SWCNTs (Chiba et al, 2023). As mentioned above in how to make a DEPS, the reason why HNBR ver.6 was not used for this vibrator DE is that the ver.6 was too soft for the DE.…”

Section: Figure 9 State Of Driving Experiments Of Robot Handmentioning

confidence: 99%

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Excellent Miniature Thin Film Dielectric Elastomer Sensors for Robot Fingers Used in Human-Robot Interaction

Chiba,

Waki

2023

AAES

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Traditional sensors used to measure properties such as deformation and pressure often use materials such as metals, ceramics, piezos and polymers. However, since many of these materials are hard, it can be difficult to measure them with a single sensor when the pressure or elongation applied to the object changes. In this experiment, a dielectric elastomer thin-film pressure sensor (0.2 mm) was fabricated using hydrogenated nitrile rubber with significantly improved hardness and elongation. This single sensor can accurately measure pressure from 1gf to 20kgf. Also, the response speed was 50ms, which was sufficiently fast. A dielectric elastomer stretch sensor was also developed. This sensor uses elastic and flexible single-walled carbon nanotubes as dielectric elastomer electrodes for the hydrogenated nitrile rubber. This greatly improved the mechanical flexibility and stretchability of the stretch sensor, making it possible to operate it as a sensor even at 400% elongation. By attaching this stretch sensor to the robot's finger closely, it is possible to detect the dynamic movement of the robot's finger and to detect the force (pressure) when the fingertip touches the target object with the above pressure sensor. In addition, by using the small diaphragm-type dielectric elastomer actuator, it was confirmed that the sensation of the robot's touching an object could be fed back to the human finger. As a result, it is thought that the feeling of the robot’s finger touching an object could be driven more realistically and accurately. In addition, both a dielectric elastomer stretch sensor and a dielectric elastomer pressure sensor were attached to the finger of the robot, and the movement of the human’s finger was sensed and the force (pressure) when the finger touched the object was also able to be detected.

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Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Figure 1 Structure and Principle Of Desmentioning

confidence: 99%

Section: Figure 9 State Of Driving Experiments Of Robot Handmentioning

confidence: 99%

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Excellent Miniature Thin Film Dielectric Elastomer Sensors for Robot Fingers Used in Human-Robot Interaction

Chiba,

Waki

2023

AAES

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Dielectric Elastomer Multi-Sensors and Tactile Actuators for Robot Fingers in Human-Robot Interaction

Chiba¹,

Waki²

2023

Preprint

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Conventional sensors used to measure properties such as deformation or pressure, etc. often make use of metals, ceramics, piezos, and other materials. Many of those materials are very hard, so if they are used as sensors, when the object is deformed, or when the pressure on the object changes from time to time, it is necessary to prepare a variety of sensors with different properties. In this experiment, a dielectric elastomer (DE) pressure sensor was fabricated using a hydrogenated nitrile rubber (HNBR) film with improved hardness and elongation. With this, even very thin film (0.2mm) can be measured at any pressure between 1gf and 20kgf. Previously developed film was harder and less stretchy than the current one, with a pressure detection width from 4 kgf to 120 kgf. This time, however, the pressure sensitivity of the finger has been made more sensitive, making it possible to measure even smaller values. A DE stretch sensor was also developed using single-walled carbon nanotube (SWCNT) electrodes with larger stretchability and flexibility, utilizing this HNBR. This greatly improved the mechanical flexibility and stretchability of the DES. Using this stretch sensor, it became possible to sense the motion of the robot's fingers, and to sense the force (pressure) when the fingertip touched the target object with the DE pressure sensor. In addition, it was confirmed that the sensation of the robot's finger touching an object can be fed back to a human finger by using a small diaphragm type vibrator DE actuator.

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Recent Development of Dielectric Elastomer Transducers and Potential Applications

Cited by 2 publications

References 48 publications

Excellent Miniature Thin Film Dielectric Elastomer Sensors for Robot Fingers Used in Human-Robot Interaction

Excellent Miniature Thin Film Dielectric Elastomer Sensors for Robot Fingers Used in Human-Robot Interaction

Dielectric Elastomer Multi-Sensors and Tactile Actuators for Robot Fingers in Human-Robot Interaction

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