Highly Sensitive and Durable Structured Fibre Sensors for Low-Pressure Measurement in Smart Skin

Bao, Yanping; Liu, Su; Xi, Wang; Yin, Rong; Xiong, Ying; Tao, Xiaoming

doi:10.3390/s19081811

Cited by 5 publications

(8 citation statements)

References 39 publications

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“…Electro–thermo–mechanical actuation and applications of 2‐ply 300f PI/Cu/PDMS HCYA. A) Tensile actuation and temperature of PI/Cu/PDMS HCYA with different tensile loads in isotonic tests with an input electric power of 1.5 W; B) effect of pre‐extension on changes of tensile force in isometric tests with an input electric power of 1.5 W; C) tensile‐force–time curves of PI/Cu/PDMS HCYA with various pre‐extension; D) tensile actuation and working temperature plotted against input electric power in the isotonic tests for actuating fabric; E) robotic hand actuated by PI/Cu/PDMS HCYAs; F) Pressure measurement set up of the pressure‐adjustable compression bandage on a lab‐made smart leg manikin [ 14,15 ] by piezoresistive sensor (red round dash line); G) measured pressure and temperature plotted against input electric power; H) pressure as a function of temperature.…”

Section: Resultsmentioning

confidence: 99%

Programmable and Thermally Hardening Composite Yarn Actuators with a Wide Range of Operating Temperature

Zhang

Zhu

Peng

et al. 2020

Adv Materials Technologies

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Actuators have wide applications in intelligent robots, deformable textiles, and wearable devices, wherein the fiber‐based coiled linear actuators are particularly advantageous due to their good flexibility, high stress, and strain. However, their performances have been limited by the employed materials, whose microstructures are not easily designed and controlled. This article proposes a new approach of engineered composite yarns for the actuators. It leads to novel solutions to overcome these difficulties by offering wide design options in material properties and device structures. Here, an engineering design of programmable and thermally‐hardening helical composite yarn actuators (HCYAs) with a wide range of operating temperature is exemplified. Polyimide (PI) and polydimethylsiloxane (PDMS) are selected to fabricate HCYAs, achieving tensile actuation of 20.7% under 1.2 MPa from −50 °C to 160 °C and competitive specific work (158.9 J kg‐1, four times of natural muscle). With constant tensile deformation, PI/PDMS HCYA nearly tripled the stress from 20 °C to 100 °C. Moreover, it is surprisingly observed an unusual thermal‐hardening phenomenon that the tensile stiffness of the PI/PDMS HCYAs increases with the rise of temperature. Equipped by electrothermally powered PI/Cu/PDMS HCYAs, robotic hands and pressure‐tunable compressive bandage are demonstrated for their potential applications in robots and wearable devices.

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Section: Resultsmentioning

confidence: 99%

Programmable and Thermally Hardening Composite Yarn Actuators with a Wide Range of Operating Temperature

Zhang

Zhu

Peng

et al. 2020

Adv Materials Technologies

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“…Meanwhile, the silicone has an almost linear relationship between stress and strain, and low hysteresis (∼2.1% full scale output) within the range below 25 kPa. 27 The model for injection of silicone was developed based on the above design, and the bones (Shanghai Sunshine Digital Medical Co. Ltd., China) were printed by three-dimensional printing. The bones and the tissue model were fixed according to their relative position, as shown in Figure 1(d).…”

Section: Fabrication Of the Soft Leg Mannequinmentioning

confidence: 99%

Fabricated leg mannequin for the pressure measurement of compression stockings

Sun

Chen

et al. 2022

Textile Research Journal

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Different lower limbs and devices used for the contact pressure measurement of the compression stocking make a significant difference to the precise contact pressure value. This study aimed to fabricate a novel soft leg mannequin based on the standard-sized wooden leg mannequin, but closer to the human leg with soft tissue and bones and to evaluate further the performance of the fabricated leg mannequin. The contact pressure exerted by the graduated compression stocking was measured by the fabricated leg mannequin at four different locations along six different cross-sections. Comparing the contact pressure measured by the fabricated leg mannequin, the standard-sized wooden leg mannequin and human legs, the fabricated leg mannequin has a similar pattern to human legs, and contact pressure exerted by the wooden leg mannequin was far higher than that of human legs. In addition, the local contact pressure measured by the fabricated leg mannequin also has a remarkable agreement with that of human legs. Moreover, there was a signiﬁcant Spearman rank correlation between the contact pressure measured by the fabricated leg mannequin and the human leg. Therefore, the performance of the fabricated leg mannequin can be consistent with the human leg, which enables the fabricated leg mannequin to replace the standard-sized wooden leg mannequin for standard tests.

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“…Silicone (type of 903, China) was adopted for its excellent elasticity, appropriate elastic modulus of ∼1.3 MPa similar to that of a typical soft tissue (~1 MPa) [23], and facile fabrication. Moreover, such silicone has an approximately linear relationship between stress and strain and low hysteresis within the range below 25 kPa [24]. The material of ABS has higher elastic modulus, three orders higher than that of silicone, and is easy of processing in 3D numerical controlled machine tools.…”

Section: Materials and Fabricationmentioning

confidence: 99%

“…The material of ABS has higher elastic modulus, three orders higher than that of silicone, and is easy of processing in 3D numerical controlled machine tools. The exerted pressure can be measured via mechanical [25], electrical [26][27][28][29][30][31] and optical signals [24,32,33]. Related to electrical sensors and mechanical sensors, optical sensors have specific merits of high sensitivity to small deformation, robustness, good immunity to electromagnetic interference, no electricity at measuring points, and ease of integration.…”

Section: Materials and Fabricationmentioning

confidence: 99%

“…Thus, optical fiber sensors were selected for the application. Similarly to those in [24], structured-fiber pressure sensors comprise an optical fiber (SMF-28 ® ultra-optical fibre, Corning Inc., USA) with Bragg gratings, a rigid base with a rectangular groove, a spacer and a thin film, as shown in the inset of figure 4. Such structure effectively converts the applied pressure into axial tension of Bragg gratings.…”

Section: Materials and Fabricationmentioning

confidence: 99%

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Smart bionic morphing leg mannequin for pressure assessment of compression garment

Bao

Wang

Xiong

et al. 2020

Smart Mater. Struct.

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Compression garments, exerting appropriate pressure on the surface of needed body zones, have a wide application in medical, athletic, body-shaping, and healthcare fields. The exerted pressure, including the pressure amplitude and the special distribution, plays a significant role on the treatment efficacy. This paper presents a novel solution for pressure evaluation of precise pressure measurement of compression garments based on a smart bionic and morphing leg mannequin with 25 structured-fibre pressure sensors and 4 temperature sensing units. These pressure sensors with a high sensitivity (up to 54.7 pm kPa −1 with an accuracy of∼0.03 kPa) in the range from 0 to 10 kPa were embedded in the leg mannequin according to the German standard (RAL-GZ 387/1) and anatomical structures of ankles. Such sensor network can provide a precise pressure-mapping rather than a mean pressure obtained from other measurement systems. The fabricated leg mannequin can morph from size 23 (Size M) to 27 (Size L) with an accuracy of 0.125 mm in circumference, reducing the required leg mannequins in routine tests of manufacturing and medical applications. Furthermore, the measured pressure exerted on the fabricated mannequin was well consistent with those exerted on the human leg, showing nonuniform pressure distribution due to the apophysis and local buckles. Therefore, the characteristics of high sensitivity to low-pressure, pressure mapping, bionic, and morphing make the leg mannequins promising to be applied for routine tests in customization of compression garments.

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Highly Sensitive and Durable Structured Fibre Sensors for Low-Pressure Measurement in Smart Skin

Cited by 5 publications

References 39 publications

Programmable and Thermally Hardening Composite Yarn Actuators with a Wide Range of Operating Temperature

Programmable and Thermally Hardening Composite Yarn Actuators with a Wide Range of Operating Temperature

Fabricated leg mannequin for the pressure measurement of compression stockings

Smart bionic morphing leg mannequin for pressure assessment of compression garment

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