Effect of Electrospun PVDF-Fibers Orientation for Vibration Sensing

2nd International Conference on Mechanical Engineering and Applied Composite Materials

机械制造;材料工程

Fabriani, Federico^1 ; Chinnam, Krishna Chytanya^1 ; Casalotti, Arnaldo^1 ; Lanzara, Giulia^1

Engineering Department, University of Rome, Roma TRE, Rome

00146, Italy^1

关键词: Cantilever vibrations;    Flexible sensing device;    Micro-scale structures;    Piezoelectric fiber;    Polyvinylidene difluoride;    Randomly distributed;    Sensor performance;    Structural health monitoring (SHM);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/544/1/012056/pdf
DOI  :  10.1088/1757-899X/544/1/012056

来源: IOP

【 摘 要 】

Advanced Structural Health Monitoring (SHM) systems require the use of high performing, ultra-thin and light weight flexible sensing devices to reduce impact in a hosting material or structure. In this paper piezoelectric polyvinylidene difluoride (PVDF) electrospun fibers were investigated to realize advanced vibration sensors. The microscale structure of the fabricated sensors is of a porous nature and consists of an aggregation of microfibers that are either randomly distributed or oriented. Being piezoelectric these fibers are capable to detect mechanical stress or strain over time in terms of a voltage signal. To investigate the reliability of piezoelectric fibers as vibration sensors, tests of a dynamic nature were conducted. It is found that the developed sensors are capable to detect a cantilever vibration over time with great accuracy and that the microfibers orientation is an important factor to maximize the sensor performance.