封装因素对PVDF压力计测量性能的影响

摘要
图/表
参考文献(17)
相关文章 (4)

全文: PDF (3235 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要采用覆铜聚酰亚胺膜和聚合物导电带封装制备了两种聚偏氟乙烯（polyvinylidene fluoride，PVDF)薄膜压力计柔性覆铜聚酰亚胺薄膜（flexible copper-clad polyimide film，FCP）和聚合物导电带（conductive polymer tap，CPT），基于分离式霍普金森压杆标定实验和细观数值模拟研究了两种压力计的几何和材料因素对传感器测量性能的影响。结果表明在20-320MPa压力范围内，FCP和CPT的拟合灵敏度分别为33.1±0.3pC/N和35.1±0.6pC/N，50MPa压力范围内CPT测量稳定性优于FCP，但较大的封装厚度和聚合物电极导致应力脉冲幅值衰减、脉宽增大。CPT冲击压缩时存在明显的应变率效应，而FCP由于胶层和电极层材料失效，应力应变曲线存在显著的非线性分段特征。数值模拟结果表明压力计芯层和敏感元件间的厚度和材料性质失谐会对敏感元件上的应力脉冲产生较大影响，其中芯层突出造成的误差最大。封装厚度越小、加载强度越高，压力计越趋向于三向受压的一维应变状态，电荷输出由三向应力状态和压电系数矩阵共同决定。实验标定灵敏度与元件应力状态、封装材料力学性质失配、层间几何缺陷以及材料应变率效应等因素相关，压力计使用时需根据测量环境和应力脉冲特征进行封装和标定。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	范志强1
	常瀚林1
	何天明1
	郑航2
	胡敬坤1
	谭晓丽1

关键词 ：聚偏氟乙烯, 压力计, 应力状态, 灵敏度系数, 应变率敏感性

Abstract：Two polyvinylidene fluoride (PVDF) based pressure gauges were prepared using flexible copper-clad polyimide film and conductive polymer tap as the packaging layer, marked flexible copper-clad polyimide film（FCP） and conductive polymer tap（CPT）, respectively. The calibration experiments of sensitive coefficient were performed based on the split Hopkinson pressure bar (SHPB). The influence of the several structural geometry factors and material properties on measuring performance of two pressure gauges were studied through mesoscopic finite element simulation. The results shown that the fitted sensitivity coefficient for FCP and CPT gauges were 33.1±0.3pC/N and 35.1±0.6pC/N in the stress range of 20-320MPa, respectively. CPT has higher measuring confidence than FCP when the pressure was below 50MPa, but CPT also show the amplitude attenuation and pulse width increase because of high packaging thickness and the viscosity of the polymer conducting layer. Dynamic compression of CPT shown significant strain rate sensitivity, while the dynamic stress-strain response of FCP displayed typical nonlinear piecewise features due to the mechanical failure of the conductive and glue layers. Numerical simulation indicated that the mismatch of thickness and material properties between the core and the sensitive element both influenced the stress pulse of the pressure gauge, and the measuring error caused by the raised core was largest. Besides, it was found that the stress state of sensitive element (SE) was more approximate to the one-dimensional strain state with the increase of loading amplitude and the decrease of the packaging thickness. The charge output of SE was synthetically determined by triaxial stress and piezoelectric coefficients. The nominal sensitivity calibrated by SHPB tests was closely related to the stress state of SE, mismatch of material properties between core and SE, geometric defects and the strain rate effect. Therefore, it was suggested that the package and calibration of pressure gauge should be according to the measuring condition and the stress pulse characteristics.

Key words： Polyvinylidene fluoride (PVDF) pressure gauge, stress state, sensitivity coefficient, strain rate sensitivity

收稿日期: 2022-03-17 出版日期: 2023-02-15

引用本文:

范志强1，常瀚林1，何天明1，郑航2，胡敬坤1，谭晓丽1. 封装因素对PVDF压力计测量性能的影响[J]. 振动与冲击, 2023, 42(3): 287-296.
FAN Zhiqiang1, CHANG Hanlin1, HE Tianming1, ZHENG Hang2, HU Jingkun1, TAN Xiaoli1. Effects of packaging factors on measurement performance of PVDF pressure gauges. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(3): 287-296.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I3/287

[1] Skwarek D A, Klimiec E, Piekarski J, et al. Electronic measurement system of foot plantar pressure [J]. Microelectronics International, 2014, 31(3): 229-234.
[2] Bauer F. PVDF shock sensors: applications to polar materials and high explosives[J]. IEEE Transactions on Ultrasonics Ferroelectrics & Frequency Control, 2000, 47(6): 1448-54.
[3] Lu L, Ding W, Liu J, et al. Flexible PVDF based piezoelectric nanogenerators-ScienceDirect[J]. Nano Energy, 2020, 78: 105251.
[4] Guo R, Zhang H, Cao S, et al. A self-powered stretchable sensor fabricated by serpentine PVDF film for multiple dynamic monitoring [J]. Materials & Design, 2019, 182: 108025.
[5] 陈业，温垚珂，闫文敏，等. 基于PVDF薄膜传感器的猪肝动态压缩力学性能测试[J]. 实验力学，2021，36(02)：269-278.
CHEN Ye, WEN Yao-ke, YAN Wen-min, et al. Dynamic compression mechanical properties of porcine liver based on PVDF piezoelectric film sensor [J]. Journal of Experimental Mechanics, 2021, 36(02): 269-278.
[6] 赵传荣，孔德仁，王胜强，等.飞片厚度对冲击波压力峰值衰减特性的影响分析[J]. 振动与冲击，2016，35(3)：135-138.
ZHAO Chuan-rong, KONG De-ren, WANG Shen-qiang, et al. Influence of flyer thickness on the attenuation characteristics of shock wave’s pressure peak [J]. Journal of Vibration and Shock, 2016, 35(3): 135-138.
[7] 盛振新，刘建湖，张显丕，等. 水下爆炸气泡射流载荷阵列测量技术探索[J]. 爆炸与冲击，2021，41(03)：55-62.
SHENG Zhen-xin, LIU Jian-hu, ZHANG Xian-pi, et al. On an array-sensor technology for measuring bubble jet load generated by underwater explosion [J]. Explosion and Shock Waves, 2021, 41(03): 55-62.
[8] 张哲，李振旺，吴文婷，等. 基于PVDF压电薄膜的入水冲击压力测试技术[J]. 舰船科学技术，2021，43(09)：20-23.
ZHANG Zhe, LI Zhen-wang, WU Wen-ting, et al. Research on the test technology of water impact pressure based on PVDF [J]. Ship Science and Technology, 2021, 43(09): 20-23.
[9] 任新见，陈虎林. PVDF传感器在爆炸近区超压测量中的应用研究[J]. 振动与冲击，2012，31(12)：146-149.
REN Xinjian, CHEN Hulin. Application of PVDF sensors in shock wave measurement of near zone of explosion [J]. Journal of Vibration and Shock, 2012, 31(12): 146-149.
[10] 范志强，马宏昊，沈兆武，等. PVDF压力计在结构表面爆炸压力测量中的应用技术研究[J]. 兵工学报，2014，35(S2)：27-32.
FAN Zhi-qiang, MA Hong-hao, SHEN Zhao-wu, et al. Investigation on Application of PVDF Gauges in Blast Pressure Measurement on Structure Surfaces [J]. Acta Armamentarii, 2014, 35(S2): 27-32.
[11] 张安跃，唐志平，郑航. PVDF压力传感器的冲击压电特性研究[J]. 实验力学，2009，24(03)：244-250.
ZHANG An-yue, TANG Zhi-ping, ZHENG Hang. A Study of Impact Piezoelectric Property of PVDF Stress Gauges [J]. Journal of Experimental Mechanics, 2009, 24(03): 244-250.
[12] Qin S, Zhang X, Yu Z, et al. Polarization study of poly(vinylidene fluoride) films under cyclic electric fields [J]. Polymer Engineering & Science, 2020, 60(3): 645-656.
[13] 张旭，覃双，杨舒棋，等. PVDF压电传感器及敏感单元设计关键技术[J]. 高压物理学报，2020，34(02)：43-49.
ZHANG Xu, QIN Shuang, YANG Shu-qi, et al. Key Design Techniques for PVDF Sensitive Element Used in Dynamic Compression Experiments[J]. Chinese Journal of High Pressure Physics, 2020, 34(02): 43-49.
[14] 范志强，马宏昊，沈兆武，等. 夹心式PVDF压力传感器压电特性及标定装置研究[J]. 振动与冲击，2014，33(16)：68-71.
FAN Zhi-qiang, MA Hong-hao, SHEN Zhao-wu, et al. Piezoelectric property of sandwich PVDF pressure gauge and its calibration device [J]. Journal of Vibration and Shock, 2014, 33(16): 68-71.
[15] 庞宝君，杨震琦，王立闻，等. PVDF压电计的动态响应特性及其在橡胶材料SHPB实验中的应用[J]. 高压物理学报，2010，24(5)：359-367.
PANG Bao-jun, YANG Zhen-qi, WANG Li-wen, et al. PVDF Stress Gauges Dynamic stress measurement and its application to SHPB experiment for rubber materials [J]. Chinese Journal of High Pressure Physics, 2010, 24(5): 359-367.
[16] 王国权，刘萌，姚艳春，等.不同本构模型对橡胶制品有限元法适应性研究[J].力学与实践，2013，35(4)：40-47.
WANG Guo-quan, LIU Meng, YAO Yan-chun, et al. Application of different constitutive models in the nonlinear finite element method for rubber parts [J]. Mechanics in Engineering, 2013, 35(4): 40–47.
[17] 王春雷，李吉超，赵明磊. 压电铁电物理[M].北京：科学出版社，2009.