摘要
聚偏二氟乙烯(polyvinylidene fluoride,PVDF)压电薄膜因其优异的动态响应特性在应变测量中已得到广泛应用,但在真实环境中,温度变化会显著影响其测量精度,从而降低了测量结果的可靠性。为此,该研究首先在准静态条件下标定了PVDF应变传感器的灵敏度系数,并在模拟温变环境中系统探究了温度变化对PVDF应变测量准确度的影响。研究发现,温度变化会显著影响PVDF的灵敏度系数,并且与温度呈现出良好的线性关系。在此基础上,提出了一种基于温度与灵敏度线性关系的新型温度补偿方法,并通过试验验证了其有效性。研究结果表明,该补偿方法可以显著提升PVDF应变传感器在温变环境中的测量精度,有效减少温度引起的测量偏差。该研究通过试验揭示了温度变化对PVDF应变测量偏差和灵敏度的影响原因,并且提供了可靠的温度补偿策略,可为PVDF应变传感器在温变环境中的可靠应用提供实践指导。
Polyvinylidene fluoride(PVDF)piezoelectric films have been widely used in strain measurement due to their excellent dynamic response characteristics.However,in real-world environments,temperature variations can significantly affect their measurement accuracy,thereby compromising the reliability of the results.To address this issue,this study first calibrates the sensitivity coefficient of a PVDF strain sensor under quasi-static conditions and systematically investigates the impact of temperature changes on measurement accuracy in a simulated thermal environment.The results revealed that temperature variations have a notable influence on the sensitivity coefficient of PVDF,which exhibits a strong linear relationship with temperature.Based on this finding,a novel temperature compensation method was proposed,utilizing the linear correlation between strain sensitivity coefficient of PVDF and temperature variation,and its effectiveness was validated through experiments.The results demonstrate that the proposed method significantly improves the measurement accuracy of PVDF strain sensors under temperature variations,effectively reducing temperature-induced errors.This study not only clarifies the underlying mechanism by which temperature affects PVDF sensitivity and measurement bias,but also provides a reliable compensation strategy,offering practical guidance for the deployment of PVDF strain sensors in temperature-varying environments.
作者
姜迪午
李鹏飞
杜飞
杨宇
徐超
JIANG Diwu;LI Pengfei;DU Fei;YANG Yu;XU Chao(School of Astronautics,Northwestern Polytechnical University,Xi’an 710072,China;Aircraft Strength Research Institute China,Xi’an 710065,China;Yangtze River Delta Research Institute,Northwestern Polytechnical University,Suzhou 215400,China)
出处
《振动与冲击》
北大核心
2025年第24期99-106,147,共9页
Journal of Vibration and Shock
基金
苏州市科技计划支持项目(SWY2021003)。
关键词
聚偏二氟乙烯(PVDF)应变传感器
应变测量
灵敏度标定
温度效应
温度补偿
polyvinylidene fluoride(PVDF)strain sensors
strain measurement
sensitivity calibration
temperature effect
temperature compensation
