Strain Measurements Methods Using Piezoelectric Polymer Film

聚偏氟乙烯(PVDF)的缩写。当作用力作用于薄膜时，会产生大的输出电压。这种特性被称为“压电性”。本研究通过实验验证了利用压电聚合物薄膜进行应变测量是可行的。本研究使用压电体聚合物制作压电式压力计。并利用该薄膜进行了实验研究，得到了以下结果：(1)实验检测到应变分布良好的压电聚合物薄膜到目前为止都很小。从实验结果来看，该方法的精度优于常规方法。(2)压电聚合物薄膜的制备采用工艺轧制法。薄膜的输出电压随轧制方向的不同而不同。在应变分析的情况下，在两个方向上叠加一片薄膜，制作了实验应变片，实验比未试片(5×5 mm)做得更远，得到了较好的应变分布实验结果。(3)利用电极只沉积在压电膜一侧的薄膜，在较大面积(10×5 mm)的小面积上测量了应变分布。(5×5 mm)。对测量精度进行了实验比较，并通过小面积胶片的对比实验验证了该方法的准确性。

Polyvinylidene fluoride(an abbreviation PVDF ) generates.large output voltage, when the force is applied to a film. This property is called "piezoelectricity". This study was examined experimentally that the strain measurement is possible using piezoelectric polymer film. This study produces the gages using piezoelectric polymer. film and the experiments were carried out using this film.From the above fact, following results were obtained.(1) It was examined experimentally strain distribution good piezoelectric polymer film until now small. From the experimental result, the results of the accuracy were better than the conventional method.(2)Piezoelectric polymer films are produced process rolling. The output voltage of the film is different according to the rolling direction. In the case of the strain analysis, therefore, it superimposed a film to 2 directions, and strain gages were produced experimentally, the experiment was carried out further than before trial gages (5×5mm)The experimental result of strain distribution was obtained with the good accuracy.(3)Using the film that the electrode is being deposited only in one side of piezo-electric film, Strain distribution were measured using wide area (10×5mm) small area. (5×5mm) of these films. The accuracy was compared experimentally.It was verified that the accuracy is good from the comparison experiment in a small area film.