Perspective Chapter: Dielectric Elastomer Sensor Capable of Measuring Large Deformation and Pressure

Chiba, Seiki; Waki, Mikio

doi:10.5772/intechopen.108622

Cited by 3 publications

(14 citation statements)

References 27 publications

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“…Next, based on Formulas (1) and ( 2) above, some have had the idea to mix in a highly dielectric material such as titanium barium in order to increase the output of the elastomer. However, incorporation of such materials stiffens the elastomer and reduces the elongation of DEA [38]. When generating power, the amount of power generated is reduced.…”

Section: Charging Circuit For Secondary Batterymentioning

confidence: 99%

“…There are some cases where a large amount of power generation, high output, or high growth cannot be expected, even if a high voltage is applied. This is because the viscoelasticity of the elastomer is affected by the type of high dielectric materials and those adjustment conditions [38].…”

Section: Charging Circuit For Secondary Batterymentioning

confidence: 99%

“…On the other hand, while liquid metal is both stretchy and conductive, being a liquid, there is concern about leakage due to driving when it is used as a device. Carbon grease is also prone to leakage, and also has poor conductivity [38]. Carbon black is highly conductive to some extent, is easy to use as an electrode, and is inexpensive.…”

Section: Charging Circuit For Secondary Batterymentioning

confidence: 99%

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Recent Development of Dielectric Elastomer Transducers and Potential Applications

Chiba¹,

Waki²

2023

EPE

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Power generation using dielectric elastomer transducers is cheap, light, stackable, easy to install, and highly efficient. Also, since the dielectric elastomer transducer is an actuator developed into an artificial muscle, if the DE motor is further developed, it might be possibly be able to drive a vehicle. Efficient robot driving, various industrial machines and the use of dielectric elastomer sensors to optimize the driving may also help solve the above problems from the perspective of eco-driving. This paper describes the latest level of development of dielectric elastomers, their main problems and solutions to these problems, and their potential applications. The possibilities and concrete plans for building local global smart cities (including local generation power for local consumption), efficient transportation, and environmental monitoring systems utilizing dielectric elastomers are also discussed.

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Section: Charging Circuit For Secondary Batterymentioning

confidence: 99%

Section: Charging Circuit For Secondary Batterymentioning

confidence: 99%

Section: Charging Circuit For Secondary Batterymentioning

confidence: 99%

See 1 more Smart Citation

Recent Development of Dielectric Elastomer Transducers and Potential Applications

Chiba¹,

Waki²

2023

EPE

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“…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 [4,39,40]. If a larger electrode deformation is required, it is better to use highly conductive CNTs (especially single-wall CNTs) [41].…”

Section: Background Of Dielectric Elastomersmentioning

confidence: 99%

“…Walker et al used five layers of sensors to detect the position of a robot fish fin [46]. S. Chiba et al prepared a softer material by adjusting the dangling chains of the elastomer and the crosslinking agent, and created a sheet-type pressure DES, demonstrating their usefulness [39]. G. Rizzello also points out the usefulness of DESs made of thin layers of soft dielectric materials (acrylic, silicon, 4 etc.)…”

Section: Background Of Dielectric Elastomersmentioning

confidence: 99%

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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Possibilities of Artificial Muscles Using Dielectric Elastomers and their Applications

Chiba

Waki²,

Takeshita

et al. 2023

AMR

Self Cite

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The recent developments in dielectric elastomers (DE) are spectacular. Currently, a DE as an actuator, 0.15 g of acrylic sandwiching SWCNT electrodes, is capable of lifting a weight of 8 kg by more than 1 mm at a speed of 88 msec. In the near future, DE motors could be used to drive electric vehicles. Moreover, the DE can be used as a high-efficiency sensor with the same structure. With a diameter of 20 mm and a thickness of 0.5 mm, it can accurately measure pressure from several kg to 150 kg. In addition, reversing this DE actuator (DEA) movement also enables high-efficiency power generation. In other words, when the DEA is stretched or pushed, it generates electric power. Single wall nanotubes (SWCNTs) were used as an electrode, and an acrylic DE power generation cartridge with a diameter of 80 mm was used. When the center of the DE power generation cartridge is pushed by about 15 mm, a power of 33.6 mJ is generated. Using these two DE cartridges, it was possible to charge a secondary battery through a DC converter. In addition to this power generator, practical research and development of power generation using wave power, wind power, waste heat, and fluids (ocean currents, water currents, etc.) is progressing. In this paper, we have described state-of-the-art DEAs, DE generators (including the case that the power generated locally by microgenerators are consumed locally), and DE sensors and explained their usefulness.

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Perspective Chapter: Dielectric Elastomer Sensor Capable of Measuring Large Deformation and Pressure

Cited by 3 publications

References 27 publications

Recent Development of Dielectric Elastomer Transducers and Potential Applications

Recent Development of Dielectric Elastomer Transducers and Potential Applications

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

Possibilities of Artificial Muscles Using Dielectric Elastomers and their Applications

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