Large‐Area Hand‐Covering Elastomeric Electronic Skin Sensor with Distributed Multifunctional Sensing Capability

Zhu, Linli; Wang, Yancheng; Mei, Deqing; Zhang, Lei; Mu, Congcong; Wang, Shihang; Dai, Songqiao; Chen, Zhijian

doi:10.1002/aisy.202100118

Cited by 18 publications

(8 citation statements)

References 53 publications

(68 reference statements)

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“…The addition of nano‐SiO 2 can increase Young's modulus of the bump electrode, which prevents large deformation when applied by shear force. [ 47 ] Besides, the SR/GNPs/AgNFs composite with a mass ratio of 1:0.05:0.8 has acceptable resistivity, which can provide great linearity of the measured resistance to detect shear force angle.…”

Section: Resultsmentioning

confidence: 99%

A Novel Flexible Centralized Force Sensor Based on Tri‐Axis Force Refactoring Method for Arbitrary Force Components Measurement

Jin,

Wang,

Mei

et al. 2023

Advanced Intelligent Systems

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Flexible force sensors have been widely applied in robotics for object exploring, remote controlling, and human–machine interactions. The tri‐axis force sensors for accurate measurement of normal and shear forces are generally in urgent demand. Most tri‐axis force sensors rely on signal analyzation between multiple elements to achieve force components, which may need numerous leading wires and limit the force angular sensing performance. Herein, a novel flexible centralized force sensor is developed based on a novel tri‐axis force refactoring method. Normal force is detected by the central parallel‐plates capacitor, and both the angle and amplitude of shear force can be extracted through the resistance changes. The normal force performance is characterized with a sensitivity of 0.057 N−1 and a detection range of 0–12 N, and the effective detection range of shear force is about 0.5–0.67 N. The minimum distinguished shear angle difference is about 7.3°, which can be further improved by increasing the sensing material's resistivity. Then, robotic grasping tests are performed and show that the sensor can accurately measure the normal and shear forces and applied shear force angle, which indicates its promising applications in potential robotic manipulation and interactions.

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Section: Resultsmentioning

confidence: 99%

A Novel Flexible Centralized Force Sensor Based on Tri‐Axis Force Refactoring Method for Arbitrary Force Components Measurement

Jin,

Wang,

Mei

et al. 2023

Advanced Intelligent Systems

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“…The mechanical, electrical, and thermal properties of these prepared composites have been characterized in our previous work. [33] Fabrication Process of Flexible and Conformal Tactile Sensor: A fourstep procedure process was developed to fabricate the proposed flexible and conformal tactile sensor, as shown in Figure S8 (Supporting Information).…”

Section: Methodsmentioning

confidence: 99%

“…The maximum value is about 25% under 60 kPa. In addition, the sensor's sensing performance would also be affected by temperature, our previous work [33] indicated that the sensitivity is decreased slightly as the increasing of temperature from 20 °C to 60 °C. Compared with other flexible tactile sensors as shown in Table S1 (Supporting Information), our developed tactile sensor has relatively high sensitivities.…”

Section: Sensing Performance Characterization Of Tactile Sensormentioning

confidence: 99%

Kirigami Design of Flexible and Conformal Tactile Sensor on Sphere‐shaped Surface for Contact Force Sensing

Wang

Chen

et al. 2022

Adv Materials Technologies

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tactile sensor and limits their applications. Functional elastomers [8,9] and novel structures [10][11][12][13] such as island, bulk, helical, and kirigami structures have been proposed to develop flexible tactile sensors, their stretchable abilities can be greatly enhanced. However, most of the developed flexible tactile sensors still cannot fit well with complex shaped objects due to their intrinsic stiffness. The initial states and sensing performance of tactile sensor before and after being integrated onto curved surfaces will also be changed due to stretching and/or compressing. Therefore, the development of flexible tactile sensor with the ability to integrate onto curved surfaces of objects with low assembly strain and/or stress remains a technical challenge.Several methods have been proposed for the development of flexible and conformal tactile sensors, they can be classified into two categories: 1) direct fabrication of tactile sensor on target curved surface of objects; 2) convert tactile sensor with flat surface into curved surface with external stimuli. For the first type of methods, transfer printing, [14] inkjet writing, [15,16] laser direct writing, [17] and curved-surface lithography [18] have been utilized to directly fabricate the sensor on the object's surface. For instance, Harnois et al. [19] reported a water transfer printing method which could integrate large-area films with electronics onto daily life objects. A bent capacitive touchpad was fabricated based on this method. But the touchpad could only qualitatively detect finger movements because of the performance changed caused by assembly strain of capacitive units. And the characterizing sensing elements directly on curved surface is complicated and inefficient. As for the latter method, assembly of electronic sensors via external stimuli [20] and kirigami design [21,22] have been reported. Hu et al. [23] proposed a kirigami method to design deformable structures for humidity sensor. This sensor could attach on the elbow to monitor the sweating condition. However, the induced internal assembly strain and stress are inevitable and will affect the sensing performance of the sensor as 2D flat sensor converts into 3D shape. Thus, reducing the assembly strain and stress for the flat-surfaced sensor onto curved surface would be crucial for the development of flexible tactile sensors, and become one goal of this research.

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“…Topical applications of wearable strain sensors include kinematics monitoring, pose estimation, and the measurement of mechanically transduced biosignals (e.g., heart rate and speech) (1)(2)(3)(4). Soft sensor arrays have been used to map pressure and to provide feedback for soft robotics and in human interface devices (5,6). Sensing movement through textiles is unique and has potential for high impact in advancing our ability to track athletics and monitor health (7).…”

Section: Introductionmentioning

confidence: 99%

Distributed sensing along fibers for smart clothing

Hannigan,

Cuthbert,

Ahmadizadeh

et al. 2024

Sci. Adv.

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Textile sensors transform our everyday clothing into a means to track movement and biosignals in a completely unobtrusive way. One major hindrance to the adoption of “smart” clothing is the difficulty encountered with connections and space when scaling up the number of sensors. There is a lack of research addressing a key limitation in wearable electronics: Connections between rigid and textile elements are often unreliable, and they require interfacing sensors in a way incompatible with textile mass production methods. We introduce a prototype garment, compact readout circuit, and algorithm to measure localized strain along multiple regions of a fiber. We use a helical auxetic yarn sensor with tunable sensitivity along its length to selectively respond to strain signals. We demonstrate distributed sensing in clothing, monitoring arm joint angles from a single continuous fiber. Compared to optical motion capture, we achieve around five degrees error in reconstructing shoulder, elbow, and wrist joint angles.

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Large‐Area Hand‐Covering Elastomeric Electronic Skin Sensor with Distributed Multifunctional Sensing Capability

Cited by 18 publications

References 53 publications

A Novel Flexible Centralized Force Sensor Based on Tri‐Axis Force Refactoring Method for Arbitrary Force Components Measurement

A Novel Flexible Centralized Force Sensor Based on Tri‐Axis Force Refactoring Method for Arbitrary Force Components Measurement

Kirigami Design of Flexible and Conformal Tactile Sensor on Sphere‐shaped Surface for Contact Force Sensing

Distributed sensing along fibers for smart clothing

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