摘要
为探索低强度冲击波下的柔性测量技术,基于8 mm孔径柔性基底,对聚偏二氟乙烯(polyvinylidene difluoride,PVDF)传感器开展激波管标定实验,根据实验结果,采用不同粘贴方式为PVDF传感器增加不同厚度的阻尼层,加载不同强度的冲击波后,从信号脉宽、灵敏度系数、过冲信号幅值等方面评估传感器的可靠性。然后加载窄脉宽冲击波验证设计的传感器能适应不同脉宽冲击波的测量。实验结果表明:添加阻尼层能够大幅降低过冲信号幅值,提高传感器测量信号脉宽,提升传感器的频响。STS-400(single-side thickened sensor-400)型传感器在两种脉宽信号加载下均得到较好的测试结果,相对测量误差不大于±12%。对比两种脉宽冲击波加载下的信号发现,PVDF薄膜传感器更适合测试脉宽在10 ms以内的信号。设计的新型PVDF传感器可为测量爆炸冲击波信号提供思路。
To explore the flexible measurement technology under low-intensity shock wave,the shock tube calibration experiment was carried out for the polyvinylidene difluoride(PVDF)sensor based on the flexible substrate with an aperture of 8 mm.According to the experimental results,different bonding modes are used to add different thicknesses of damping layer for the PVDF sensor,and the reliability of the sensor was evaluated in terms of the signal pulse width,the sensitivity coefficient and the amplitude of overshoot signal after loading shock waves with different intensities.Then the narrow pulse width shock wave was loaded to verify that the designed sensor can adapt to the measurement of different pulse width shock waves.The experimental results show that adding damping layer can greatly reduce the amplitude of overshot signal and improve the pulse width and frequency response of sensor measurement.STS-400(single-side thickened sensor-400)under two types of pulse width signal loading obtained better test results,and the relative measurement error is not greater than±12%.At the same time,it is concluded that PVDF film sensor is more suitable for testing signals with a pulse width of 10 ms or less.The new PVDF sensor designed can provide ideas for measuring explosive shock wave signals.
作者
谢林
刘迎彬
范志强
胡晓艳
XIE Lin;LIU Yingbin;FAN Zhiqiang;HU Xiaoyan(School of Environment and Safety Engineering,North University of China,Taiyuan 030051,Shanxi,China;School of Aerospace Engineering,North University of China,Taiyuan 030051,Shanxi,China)
出处
《高压物理学报》
CAS
CSCD
北大核心
2023年第4期34-43,共10页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(12072326,12002319)
省部共建动态测试技术国家重点实验室开放基金(2022-SYSJJ-06)。
关键词
PVDF传感器
激波管
复合压电效应
冲击波
柔性测量
PVDF sensor
shock tube
composite piezoelectric effect
shock wave
flexible measurement
