陈婷1,袁严辉*,2,顾晓勤2

Structure optimization analysis of contact force sensor based on PVDF

摘要:

以聚偏氟乙烯(PVDF)作为触力传感器的敏感元件,探究PVDF触力传感器的上下衬底材料的类型和厚度对传感器灵敏度的影响。通过压电材料的压电方程的理论计算,得到触力输入与电压输出的关系。通控制变量的方法,分析触力传感器的上下衬底的材料类型和厚度对传感器灵敏度的影响。有限元分析结果表明,上下衬底材料的厚度和弹性模量对触力传感器的灵敏度影响较大。当采用0.025mm的PDMS作为上下衬底材料时,触力传感器能得达到0.527mV/N的灵敏度。

Abstract:

Polyvinylidene fluoride (PVDF) was used as the sensing element of the contact force sensor to explore the influence of the properties and thickness of the upper and lower substrate materials on the sensitivity of the sensor.Through the theoretical calculation of piezoelectric equation of piezoelectric material, the relationship between contact force input and voltage output was obtained. The influence of the material properties and thickness of the upper and lower substrates on the sensitivity of the contact force sensor was analyzed by controlling variables. The results of finite element analysis showed that the thickness and elastic modulus of the upper and lower substrate materials has great influence on the sensitivity of the contact force sensor. When 0.025mm PDMS was used as the upper and lower substrate material, the sensitivity of the contact force sensor could reach 0.527mV/n.