Experimentally verified finite element modeling and analysis of a conformable piezoelectric sensor
Experimentally verified finite element modeling and analysis of a conformable piezoelectric sensor
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实验验证了合形压电传感器的有限元建模和分析
DOI：
10.1088/1361-665x/ac08ae
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发表时间：
2021
影响因子：
4.1
通讯作者：
Nikta Amiri;Farita Tasnim;Mostafa Tavakkoli Anbarani;C. Dagdeviren;M. Karami
中科院分区：
文献类型：
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作者：
Nikta Amiri;Farita Tasnim;Mostafa Tavakkoli Anbarani;C. Dagdeviren;M. Karami
本文介绍了一个三维有限元模型的开发，利用COMSOL Multiphysics模拟的一个整合的压电传感器。该传感器具有由四个圆形压电元件组成的多层结构，这些压电元件排列在层压在软基板上的阵列结构中，并且能够提供软组织表面的应变映射，用于面部皮肤的时空生物运动学评估。在这里，我们提供了传感器的有限元法（FEM）来预测其机电行为。本文研究了压电传感器的设计参数，如尺寸和基板的电压灵敏度和传感器的顺应性的影响。有限元模型的建立是为了理解潜在的物理和指导系统的机械特性。所开发的模型通过两个系列的测试实验验证。第一组测试涉及全面的体外机械测试，以提供压缩、拉伸和弯曲过程中应变的准确测量。第二组测试对健康和肌萎缩侧索硬化受试者进行体内实验。实验验证的有限元模型提供了一个详细的洞察分析传感器的响应，建立新的设计规则，为下一代的适应压电传感器。
This paper presents development of a three dimensional finite element model for simulations of a conformable piezoelectric sensor utilizing COMSOL Multiphysics. The sensor has a multi-layer structure composed of four circular piezoelectric elements arranged in an array structure laminated on a soft substrate and is capable of providing a strain mapping of soft tissue surfaces for spatiotemporal biokinematic assessment of the facial skin. Here, we provide the finite element method (FEM) for the sensor to predict its electromechanical behavior. This paper studies the effect of the design parameters such as dimensions of the piezoelectric sensor and the substrate on voltage sensitivity and sensor compliance. The FEM model is established to understand the underlying physics and guide the mechanical characterization of the system. The developed model is experimentally verified through two series of tests. The first set of tests involve comprehensive in vitro mechanical testing to provide accurate measurements of strain during compression, stretching, and bending. The second set of tests present in vivo experiments on healthy and amyotrophic lateral sclerosis subjects. The experimentally verified FEM model provides a detailed insight into analyzing the response of the sensor which establishes new design rules for next generations of conformable piezoelectric sensors.