压电
脉冲(物理)
电压
材料科学
压电传感器
信号(编程语言)
压力(语言学)
电极
传感器阵列
复合材料
声学
光电子学
电气工程
计算机科学
物理
工程类
哲学
量子力学
语言学
程序设计语言
机器学习
作者
Weimin Xia,Peipei Che,Mengjie Ren,Xiaofang Zhang,Congjun Cao
标识
DOI:10.1016/j.orgel.2022.106729
摘要
To realize a piezoelectric sensor array for identifying the location of impact stress, the large-scale (200mm × 200 mm) poly(vinylidene-trifluoride) (P(VDF-TrFE) 75/25mol%) films with thickness range from 20 μm to 80 μm are prepared using traditional solution casting method, which exhibits the favorable ferroelectric and electromechanical properties. By using screen printing with silver paste electrode, an orthohexagonal-shaped sensor array containing 19 P(VDF-TrFE) units is obtained. Then the dependence of output voltage of piezoelectric signal on the thickness of film and enforced impulse stress is investigated where an impact force testing machine is employed to simulate the impact of a flying ping pong ball. This piezoelectric sensor exhibits a large signal response of 8.9 V under an impulse stress of 1.5 MPa at an impacting speed of 500 mm/min. After signal acquisition and processing, the output signal wave of main senor and adjacent unit can be clearly distinguished from each other, and this array shows a fast response speed of 2 ms, indicating that this sensor array has a prospect of application in intelligent table tennis racket and other impulse signal monitoring area.
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