Flexible Micropillar Array for Pressure Sensing in High Density Using Image Sensor

Cao, Zimei; He, Kaiyang; Xiong, Wei; Chen, Yan; Qiu, Xianbo; Yu, Duli; Guo, Xiaoliang

doi:10.1002/admi.201902205

Cited by 12 publications

(13 citation statements)

References 41 publications

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“…The microstructures often introduced in flexible pressure sensors can be divided into regular microstructures and random microstructures. Regular microstructures include pyramids [ 74 , 75 ], domes [ 76 , 77 , 78 ], rods [ 79 , 80 ], etc. These structures can be obtained by photolithography or template methods, but some specific equipment such as binary exposure machines are required.…”

Section: Fundamental Designs Of Flexible Pressure Sensorsmentioning

confidence: 99%

Force-Sensitive Interface Engineering in Flexible Pressure Sensors: A Review

Tai

Wei

et al. 2022

Sensors

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Flexible pressure sensors have received extensive attention in recent years due to their great importance in intelligent electronic devices. In order to improve the sensing performance of flexible pressure sensors, researchers are committed to making improvements in device materials, force-sensitive interfaces, and device structures. This paper focuses on the force-sensitive interface engineering of the device, which listing the main preparation methods of various force-sensitive interface microstructures and describing their respective advantages and disadvantages from the working mechanisms and practical applications of the flexible pressure sensor. What is more, the device structures of the flexible pressure sensor are investigated with the regular and irregular force-sensitive interface and accordingly the influences of different device structures on the performance are discussed. Finally, we not only summarize diverse practical applications of the existing flexible pressure sensors controlled by the force-sensitive interface but also briefly discuss some existing problems and future prospects of how to improve the device performance through the adjustment of the force-sensitive interface.

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Section: Fundamental Designs Of Flexible Pressure Sensorsmentioning

confidence: 99%

Force-Sensitive Interface Engineering in Flexible Pressure Sensors: A Review

Tai

Wei

et al. 2022

Sensors

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“…With the rapid development of artificial intelligence and the Internet of things, flexible piezoresistive sensors have attracted extensive attention as an important way to convert external pressure signals into resistant change. [ 1‐5 ] Recently, some sensors based on multiple microstructure‐design, such as various types of bionic structures (e.g., vanes, [ 6 ] cilia [ 7,8 ] ), micro‐pyramids, [ 9 ] micro‐pillars, micro‐ridges, and micro‐domes, micro‐pores, etc., [ 10 ] have been proposed to enhance the sensing performance. [ 11–14 ] For instance, Wu et al.…”

Section: Introductionmentioning

confidence: 99%

“…

micro-pillars, micro-ridges, and microdomes, micro-pores, etc., [10] have been proposed to enhance the sensing performance. [11][12][13][14] For instance, Wu et al used rose petal (RP) and paper mulberry (PM) leaves to fabricate an asymmetric complementary structure.

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mentioning

confidence: 99%

Ultra‐Wide Range, High Sensitivity Piezoresistive Sensor Based on Triple Periodic Minimum Surface Construction

Feng

et al. 2023

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Flexible piezoresistive sensors with biological structures are widely exploited for high sensitivity and detection. However, the conventional bionic structure pressure sensors usually suffer from irreconcilable conflicts between high sensitivity and wide detection response range. Herein, a triple periodic minimum surface (TPMS) structure sensor is proposed based on parametric structural design and 3D printing techniques. Upon tailoring of the dedicated structural parameters, the resulting sensors exhibit superior compression durability, high sensitivity, and ultra–high detection range, that enabling it meets the needs of various scenes. As a model system, TPMS structure sensor with 40.5% porosity exhibits an ultra–high sensitivity (132 kPa−1 in 0–5.7 MPa), wide detection strain range (0–31.2%), high repeatability and durability (1000 cycles in 4.41 MPa, 10000 s in 1.32 MPa), and low detection limit (1% in 80 kPa). The stress/strain distributions have been identified using finite element analysis. Toward practical applications, the TPMS structural sensors can be applied to detect human activity and health monitoring (i.e., voice recognition, finger pressure, sitting, standing, walking, and falling down behaviors). The synergistic effects of MWCNTs and MXene conductive network also ensure the composite further being utilized for electromagnetic interference shielding applications.

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“…11 For practical applications, flexible piezoresistive sensors with high sensitivity and stretchability are urgently needed. Accordingly, various flexible polymers have been developed recently, such as polydimethylsiloxane (PDMS), 12 Ecoflex, 13 polyethylene terephthalate (PET), 14 polyimide (PI), 15 and so on. Although the above substrate materials exhibit great stretchability, the diversity with human tissues should be considered.…”

Section: Introductionmentioning

confidence: 99%