Self‐Powered Flexible Sensor Based on the Graphene Modified P(VDF‐TrFE) Electrospun Fibers for Pressure Detection

2019 ◽  
Vol 304 (12) ◽  
pp. 1900504 ◽  
Author(s):  
Ping Li ◽  
Libo Zhao ◽  
Zhuangde Jiang ◽  
Mingzhi Yu ◽  
Zhen Li ◽  
...  
Keyword(s):  
Electrospun Fibers ◽  
Flexible Sensor ◽  
Self Powered

scholarly journals Flexible Multiscale Pore Hybrid Self-Powered Sensor for Heart Sound Detection

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4508
Author(s):  
Boyan Liu ◽  
Liuyang Han ◽  
Lyuming Pan ◽  
Hongzheng Li ◽  
Jingjing Zhao ◽  
...  
Keyword(s):  
Piezoelectric Coefficient ◽  
Heart Sound ◽  
Piezoelectric Materials ◽  
Ferroelectric Material ◽  
Flexible Sensor ◽  
Β Phase ◽  
Short Processing Time ◽  
Sound Detection ◽  
Corona Poling ◽  
Self Powered

This research introduces an idea of producing both nanoscale and microscale pores in piezoelectric material, and combining the properties of the molecular β-phase dipoles in ferroelectric material and the space charge dipoles in order to increase the sensitivity of the sensor and modulate the response frequency bandwidth of the material. Based on this idea, a bi-nano-micro porous dual ferro-electret hybrid self-powered flexible heart sound detection sensor is proposed. Acid etching and electrospinning were the fabrication processes used to produce a piezoelectric film with nanoscale and microscale pores, and corona poling was used for air ionization to produce an electret effect. In this paper, the manufacturing process of the sensor is introduced, and the effect of the porous structure and corona poling on improving the performance of the sensor is discussed. The proposed flexible sensor has an equivalent piezoelectric coefficient d33 of 3312 pC/N, which is much larger than the piezoelectric coefficient of the common piezoelectric materials. Experiments were carried out to verify the function of the flexible sensor together with the SS17L heart sound sensor (BIOPAC, Goleta, CA, USA) as a reference. The test results demonstrated its practical application for wearable heart sound detection and the potential for heart disease detection. The proposed flexible sensor in this paper could realize batch production, and has the advantages of flexibility, low production cost and a short processing time compared with the existing heart sound detection sensors.

scholarly journals Piezoelectric Polyacrylonitrile Nanofiber Film-Based Dual-Function Self-Powered Flexible Sensor

2018 ◽  
Vol 10 (18) ◽  
pp. 15855-15863 ◽  
Author(s):  
Gengrui Zhao ◽  
Xiaodi Zhang ◽  
Xin Cui ◽  
Shu Wang ◽  
Zhirong Liu ◽  
...  
Keyword(s):  
Dual Function ◽  
Flexible Sensor ◽  
Self Powered ◽  
Nanofiber Film

scholarly journals Large Scale Triboelectric Nanogenerator and Self-Powered Flexible Sensor for Human Sleep Monitoring

Sensors ◽  
2018 ◽  
Vol 18 (6) ◽  
pp. 1713 ◽  
Author(s):  
Xiaoheng Ding ◽  
Hailin Cao ◽  
Xinghong Zhang ◽  
Mingyu Li ◽  
Yuntian Liu
Keyword(s):  
Large Scale ◽  
Triboelectric Nanogenerator ◽  
Sleep Monitoring ◽  
Flexible Sensor ◽  
Human Sleep ◽  
Self Powered

scholarly journals A Self-Powered Portable Flexible Sensor of Monitoring Speed Skating Techniques

Biosensors ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 108
Author(s):  
Zhuo Lu ◽  
Yongsheng Zhu ◽  
Changjun Jia ◽  
Tianming Zhao ◽  
Meiyue Bian ◽  
...  
Keyword(s):  
Big Data ◽  
Polyvinylidene Fluoride ◽  
Flexible Sensors ◽  
Flexible Sensor ◽  
User Training ◽  
Speed Skating ◽  
Sport Industry ◽  
Sensor Signals ◽  
External Power ◽  
Self Powered

With the development of 5G technology, contemporary technologies such as Internet of Things (IoT) and Big Data analyses have been widely applied to the sport industry. This paper focuses on the design of a portable, self-powered, flexible sensor, which does not require an external power supply. The sensor is capable of monitoring speed skating techniques, thereby helping professional athletes to enhance their performance. This sensor mainly consists of Polyvinylidene Fluoride (PVDF) with polarization after a silvering electrode and a flexible polyester substrate. Flexible sensors are attached to the push-off joint part of speed skaters and the ice skate blade. During motion, it produces different piezoelectricity signals depending on the states of motion. The monitoring and analyzing of the real-time sensor signals will adjust the athlete’s skating angle, frequency, and push-off techniques, thus improving user training and enhancing performance. Moreover, the production of piezoelectric signals can charge the capacitor, provide power for small electronic equipment (e.g., wireless device), and extend the applications of wearable flexible sensors to the Big Data and IoT technologies in the sport industry.

Self-powered ultraviolet–visible–near infrared perovskite/silicon hybrid photodetectors based on a novel Si/SnO2/MAPbI3/MoO3 heterostructure

2020 ◽  
Vol 13 (12) ◽  
pp. 121001
Author(s):  
Wei Qu ◽  
Shukun Weng ◽  
Liping Zhang ◽  
Min Sun ◽  
Bo Liu ◽  
...  
Keyword(s):  
Near Infrared ◽  
Self Powered

Development of a Self-Powered Food Sanitation Center

2002 ◽  
Author(s):  
Brady Krass ◽  
Charles Hannon ◽  
Joseph Gerstmann
Keyword(s):  
Self Powered ◽  
Food Sanitation
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