Optimizing Capacitive Pressure Sensor Geometry: A Design of Experiments Approach with a Computer-Generated Model
Author:
Keshyagol Kiran1ORCID, Hiremath Shivashankarayya12ORCID, H. M. Vishwanatha3ORCID, Kini U. Achutha3, Naik Nithesh3ORCID, Hiremath Pavan3
Affiliation:
1. Department of Mechatronics, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, India 2. Survivability Signal Intelligence Research Center, Hanyang University, Seongdong-gu, Seoul 04763, Republic of Korea 3. Department of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, India
Abstract
This study presents a comprehensive investigation into the design and optimization of capacitive pressure sensors (CPSs) for their integration into capacitive touch buttons in electronic applications. Using the Finite Element Method (FEM), various geometries of dielectric layers were meticulously modeled and analyzed for their capacitive and sensitivity parameters. The flexible elastomer polydimethylsiloxane (PDMS) is used as a diaphragm, and polyvinylidene fluoride (PVDF) is a flexible material that acts as a dielectric medium. The Design of Experiment (DoE) techniques, aided by statistical analysis, were employed to identify the optimal geometric shapes of the CPS model. From the prediction using the DoE approach, it is observed that the cylindrical-shaped dielectric medium has better sensitivity. Using this optimal configuration, the CPS was further examined across a range of dielectric layer thicknesses to determine the capacitance, stored electrical energy, displacement, and stress levels at uniform pressures ranging from 0 to 200 kPa. Employing a 0.1 mm dielectric layer thickness yields heightened sensitivity and capacitance values, which is consistent with theoretical efforts. At a pressure of 200 kPa, the sensor achieves a maximum capacitance of 33.3 pF, with a total stored electric energy of 15.9 × 10−12 J and 0.468 pF/Pa of sensitivity for 0.1 dielectric thickness. These findings underscore the efficacy of the proposed CPS model for integration into capacitive touch buttons in electronic devices and e-skin applications, thereby offering promising advancements in sensor technology.
Reference44 articles.
1. Dong, C., Bai, Y., Zou, J., Cheng, J., An, Y., Zhang, Z., Li, Z., Lin, S., Zhao, S., and Li, N. (2024). Nondestructive Testing and Evaluation, Taylor and Francis Ltd. 2. Design of Capacitive Pressure Sensors Integrated with Anisotropic Wedge Microstructure-Based Dielectric Layer;Hu;IEEE Sensors J.,2023 3. Diaphragm shape effect on the performance of foil-based capacitive pressure sensors;Khan;AIP Adv.,2020 4. PDMS/PVDF-MoS2 based flexible triboelectric nanogenerator for mechanical energy harvesting;Singh;Polymer,2023 5. Chen, J., Zheng, J., Gao, Q., Zhang, J., Zhang, J., Omisore, O.M., Wang, L., and Li, H. (2018). Polydimethylsiloxane (PDMS)-based flexible resistive strain sensors for wearable applications. Appl. Sci., 8.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|