贴合材料硬度对PVDF薄膜传感器冲击波测量的影响研究  

Research on the influence of hardness of adhesive materials on shock wave measurement of PVDF thin film sensors

作　　者：潘绪仲 彭澎[1] 狄长安[1] 张永建 Pan Xuzhong;Peng Peng;Di Chang′an;Zhang Yongjian(School of Mechanical Engineer,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,南京210094

出　　处：《国外电子测量技术》2024年第5期78-83,共6页Foreign Electronic Measurement Technology

基　　金：国家自然科学基金青年科学基金(12102190);KJW基础加强技术领域基金(2022-JCJQ-JJ-0367)项目资助。

摘　　要：在人员毁伤效能评估中,体感冲击波值为重要的毁伤判据之一。为提高人员体表冲击波测试的准确性,同时保证传感器阻抗匹配的优势,提出了一种柔性膜片阻抗匹配下的冲击波测试技术,并对不同硬度的贴合材料对冲击波超压测量的影响展开了实验研究。首先在刚性表面对聚偏二氟乙烯薄膜(PVDF)传感器进行了冲击波标定实验,得到了PVDF传感器力电响应关系;在此基础上,对4种硬度的聚氨酯橡胶作为贴合材料的PVDF传感器加载不同强度冲击波,实验结果表明,与PVDF直接贴合在类生物组织上相比,硬度为50A的贴合材料能够改善横向效应的影响使得传感器灵敏度系数基本保持为常数,但贴合材料硬度增加为70A和90A时测量非线性度分别增加了22.6%与30.2%。In the evaluation of personnel damage effectiveness,the value of somatosensory shock wave is one of the important damage criteria.To improve the accuracy of shock wave testing on personnel surface and ensure the advantages of sensor’s impedance matching,a shock wave testing technique based on flexible membrane and impedance matching has been proposed,and experimental research was conducted on the influence of bonding materials with different hardness on shock wave overpressure measurement.Firstly,shock wave calibration experiments were conducted on the PVDF sensor on rigid surface to obtain the electromechanical response relationship of the PVDF sensor.On this basis,PVDF sensor using polyurethane rubber with four different hardness as bonding materials were loaded with different strength shock wave.The experimental results showed that compared with PVDF directly bonding to biological tissues,the bonding material with a hardness of 50A could improve the influence of lateral effect and keep the sensitivity coefficient of the sensor basically constant.However,when the hardness of the bonding material increased to 70A and 90A,the nonlinearity of measurement increased by 22.6%and 30.2%,respectively.

关 键 词：体表冲击波 贴合材料 特征阻抗 聚偏二氟乙烯薄膜 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]