基于聚偏氟乙烯的触力传感器结构优化分析

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,通过控制变量的方法探究了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。通过对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。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,触力传感器的灵敏度达到0.527mV/N。

Abstract:

Using polyvinylidene fluoride (PVDF) as the sensing element of the contact force sensor, the influence of the types and thickness of the upper and lower substrate materials on the sensitivity of the sensor was explored by controlling variables. Through theoretical calculation of piezoelectric equation of piezoelectric material, the relationship between contact force input and voltage output was obtained. The results of finite element analysis show 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 is used as the upper and lower substrate material, the sensitivity of the contact force sensor can reach 0.527mV/N.