Recent progress in tactile sensors and their applications in intelligent systems

Liu, Yue; Bao, Rongrong; Tao, Juan; Li, Jing; Dong, Ming; Pan, Caofeng

doi:10.1016/j.scib.2019.10.021

Cited by 154 publications

(83 citation statements)

References 106 publications

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“…[149] For further reading on mechanical energy harvesting, we direct the reader to the following references. [152][153][154][155][156][157][158][159]…”

Section: Applicationsmentioning

confidence: 99%

Energy Harvesting and Storage with Soft and Stretchable Materials

et al. 2021

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Soft robotics can interact with humans safely. 3) Devices built from stretchable materials have a greater mechanical degree of freedom. This allows electronics, displays, and sensors to be integrated into places that would be difficult or impossible with rigid devices and enables new types of human-computer interfaces. It also allows robotics to have enhanced levels of dexterity and complexity in movement (consider the octopus as an inspiring example). 4) Devices that can be deformed elastically can be engineered to have new or emerging properties, such as antennas that change frequency with elongation, [21] intelligent materials that can perform unconventional forms of logic, [22,23] or composites that change thermal conductivity, [24] electrical conductivity, [25] or dielectric properties with deformation. [26][27][28] Most robotic and electronic devices require electricity to function, as shown on the left side of Figure 1A. Electricity can power sensors, enable computation, drive locomotion, and transmit information. Although most devices use electricity from an outlet, such "tethered" devices create notable limitations. In addition to limiting the degree of freedom of robotic materials, plug-in devices must be within a chords-length of a functioning outlet, thereby confining the range of use of such devices. Although battery operated devices can operate for some time without being plugged-in, the need to do so periodically is at best a nuisance that limits the operating time of a device. At worst, it can lead to issues such as lack of compliance with wearable devices (that is, the device is taken off for charging and never put back on) or disruptions in operation (a particular problem for health care devices or remotely deployed devices). Thus, there is a compelling interest in harvesting energy from the ambient to create tetherless devices or even devices that need less charging. Figure 1A (right side) provides examples of applications that may benefit from harvesting, such as internetof-things (IOT) devices, soft robots, wearables, implantables, and deployables (that is, devices sent to remote locations that do not have electrical outlets). Energy Harvesting CategoriesStrategies to harness energy typically convert waste or otherwise unused energy from the ambient into electricity. Although This review highlights various modes of converting ambient sources of energy into electricity using soft and stretchable materials. These mechanical properties are useful for emerging classes of stretchable electronics, e-skins, bio-integrated wearables, and soft robotics. The ability to harness energy from the environment allows these types of devices to be tetherless, thereby leading to a greater range of motion (in the case of robotics), better compliance (in the case of wearables and e-skins), and increased application space (in the case of electronics). A variety of energy sources are available including mechanical (vibrations, human motion, wind/fluid motion), electromagnetic (radio frequency (RF), solar), and ther...

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“…[149] For further reading on mechanical energy harvesting, we direct the reader to the following references. [152][153][154][155][156][157][158][159]…”

Section: Applicationsmentioning

confidence: 99%

Energy Harvesting and Storage with Soft and Stretchable Materials

et al. 2021

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“…Flexible and wearable tactile sensors that acquire information through physical contact with objects have attracted notable research interests in various application fields, including robotics, artificial intelligence, healthcare monitoring, and human–machine interactions (HMI). [ 1–7 ] Over the past years, a variety of flexible tactile sensors with high performance have been investigated based on different physical transduction mechanisms, such as waveguide, [ 8 ] resistance, [ 9–11 ] capacitance, [ 12 ] piezoelectricity, [ 13–17 ] and piezoresistivity. [ 18 ] Meanwhile, the tactile sensors can transduce the mechanical stimuli including touch or external force into measurable and recordable electrical signals, which can map them on corresponding sensing units.…”

Section: Introductionmentioning

confidence: 99%

“…Fortunately, a newly arising triboelectric nanogenerator (TENG) developed by Wang and co‐workers provides a promising solution to address the issue mentioned above. [ 3–7,19–24 ] Based on the sensing mechanism of coupling contact electrification and electrostatic induction, [ 25–30 ] TENG, with intrinsic merits of cost efficiency, high output voltage, easy manufacturability, and zero power consumption, can harvest ambient mechanical energy and convert it into electricity, which can be employed to act directly as self‐powered active sensor. [ 3–5,19,22,24,30–32 ] For instance, Wang et al.…”

Section: Introductionmentioning

confidence: 99%

Flexible High‐Resolution Triboelectric Sensor Array Based on Patterned Laser‐Induced Graphene for Self‐Powered Real‐Time Tactile Sensing

Yan

Wang

Xia

et al. 2021

Adv Funct Materials

207

110

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Flexible tactile sensors are garnering substantial interest for various promising applications, including artificial intelligence, prosthetics, healthcare monitoring, and human–machine interactions (HMI). However, it still remains a critical challenge in developing high‐resolution tactile sensors without involving high‐cost and complicated manufacturing processes. Herein, a flexible high‐resolution triboelectric sensing array (TSA) for self‐powered real‐time tactile sensing is developed through a facile, mask‐free, high‐efficient, and environmentally friendly laser direct writing technique. A 16 × 16 pixelated TSA with a resolution of 8 dpi based on patterned laser‐induced graphene (LIG) electrodes (7 Ω sq−1) is fabricated by the complementary intersection overlapping between upper and lower aligned semicircular electrode arrays. With the especially patterning design, the complexity of TSA and the number of data channels is reduced. Meanwhile, the TSA platform exhibits excellent durability and synchronicity and enables the achievement of real‐time visualization of multipoint touch, sliding, and tracking motion trajectory without power consumption. Furthermore, a smart wireless controlled HMI system, composed of a 9‐digital arrayed touch panel based on a LIG‐patterned triboelectric nanogenerator, is constructed to control personal electronics wirelessly. Consequently, the self‐powered TSA as a promising platform demonstrates great potential for an active real‐time tactile sensing system, wireless controlled HMI, security identification and, many others.

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“…[37][38][39] Liu et al reported that Ag NW/SF is a promising conductive and transparent substrate for exible organic light emitting diodes and can be used as a substitute for typical brittle ITO electrodes. 40 Min et al demonstrated that patterned Ag NW on a SF substrate acts as a transparent resistor and a radiofrequency antenna for food sensors. 41 Qi et al reported that Ag NW and SF composite lms have excellent transmittance and conductivity and can be used as exible interconnectors.…”

Section: Introductionmentioning

confidence: 99%