| 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(3):244~250 |
| PVDF压力传感器的冲击压电特性研究 |
| A Study of Impact Piezoelectric Property of PVDF Stress Gauges |
| 投稿时间：2008-12-11 修订日期：2008-04-10 |
| DOI： |
| 中文关键词: PVDF 冲击应力计 压电特性 灵敏度系数 |
| 英文关键词:PVDF impact stress gauge piezoelectric property sensitivity coefficient |
| 基金项目: |
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| 中文摘要: |
| PVDF薄膜是一种新型的聚合物压电材料。为了研究PVDF薄膜在低压和一维应变下的压电特性，利用立式Hopkinson压杆和一级轻气炮标定了自研制PVDF压力传感器的压电曲线，实验表明该应力传感器频响高，波形稳定，线性度良好，拟合灵敏度系数K值在0~20MPa和100~450MPa压力范围分别为14.96pC/N和11.9pC/N，可以基本满足动态冲击应力测试的要求。但由于PVDF薄膜的系数K受多方面的影响，定量分析有相当难度，建议使用跟实际工作状况相近的标定K值。 |
| 英文摘要: |
| PVDF film is a new pattern of polymer piezoelectric materials. In order to study the piezoelectric properties of PVDF films under low pressure and one-dimensional strain, the impact piezoelectric property of PVDF stress gauges designed in this laboratory was calibrated by using a vertical Hopkinson press bar apparatus and an one-stage light gas gun. Experimental records show that it has high frequency response, steady waveform, and excellent linearity. The fitted sensitivity coefficients are 14.96pC/N and 11.9pC/N for the pressure range of 0~20MPa and 100MPa~400MPa, respectively. Results show that PVDF stress gauges developed in this lab can basically meet the demand for impact stress measurement. However, because of extensive factors that affect the coefficient K of PVDF films, it is considerably difficult to quantitative analysis. It is recommended that the use of K value calibration should be compatible with the actual working conditions. |
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