基于PVDF薄膜的冲击波压电传感器基底构型优化  

Substrate Configuration Optimization of PVDF Thin Film Sensor Based on Shock Waves Composite Piezoelectric Effect

作　　者：常瀚林 谢林 杨晓鹏 范志强[1] CHANG Hanlin;XIE Lin;YANG Xiaopeng;FAN Zhiqiang(School of Aerospace Engineering,North University of China,Taiyuan 030051,China;School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学航空宇航学院,山西太原030051 [2]中北大学环境与安全工程学院,山西太原030051

出　　处：《中北大学学报（自然科学版）》2024年第5期557-564,共8页Journal of North University of China(Natural Science Edition)

基　　金：省部共建动态测试技术国家重点实验室开放基金(2022-SYSJJ-06);国家自然科学基金(12072326)。

摘　　要：根据柔性压电薄膜的压电原理,设计了复合压电效应传感器来用于冲击波信号测量。为研究传感器基底构型对其测量性能的影响规律,分别制备了不同孔径变形区的基底,调整压电薄膜的变形模态以调控其冲击波测量性能。实验结果表明:通过增大聚氯乙烯(PVC)基底的孔径,可以大幅度增加聚偏二氟乙烯(PVDF)薄膜传感器的灵敏度系数,并且随着变形区直径的增加,信号的脉宽也随之增大。最后通过爆炸实验,研究了PVC基底对PVDF薄膜传感器信号的影响,验证了变形区直径8 mm基底的PVDF传感器在爆炸冲击波测量中的准确性。这为今后PVDF薄膜传感器PVC基底变形区的选择提供了参考。A composite piezoelectric effect sensor was designed based on the principles of flexible piezoelectric films for the measurement of shock wave signals.To investigate the impact of sensor substrate configurations on its measurement performance,different substrates with varying aperture sizes in the deformation region were prepared.This allowed for the adjustment of the deformation modes of the piezoelectric film,thereby controlling its performance in measuring shock waves.Experimental results reveal that increasing the aperture size of the polyvinyl chloride(PVC)substrate significantly enhances the sensitivity coefficient of the polyvinylidence fluoride(PVDF)film sensor.Moreover,as the diameter of the deformation region increases,the signal’s pulse width also increases accordingly.Finally,through explosive experiments,the influence of the PVC substrate on the signal of the PVDF film sensor was studied,confirming the accuracy of the PVDF sensor with an 8mm deformation region diameter in measuring explosive shock waves.This study provides valuable insights for future selection of PVC substrate deformation regions in PVDF film sensors.

关 键 词：PVC基底 PVDF传感器 灵敏度系数 复合压电效应 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]