Flexible capacitive sensors are pervasive across multiple sectors, from healthcare to robotics. Although they offer better linearity and lower hysteresis, they require a large surface area to provide suitable sensitivity. One way of addressing this is through dielectric fillers. However, finding the right amount and type of filler is a challenge: the same material that improves a sensor's sensitivity can also cause detrimental changes in physical parameters. This paper describes how low-cost, high performing dielectric fillers - strontium titanate and barium titanate - can be introduced into Ecoflex to form a soft, sew-able sensor; and presents the concentrations of dielectric materials which offer both a good dielectric response, and the ability to pour the material and form the device. It highlights the advantages of barium titanate - which shows a better percentage dielectric constant increase - unless applications require the use of fine detail or cross-axis strain. The linearity, hysteresis, sensitivity, and cross-axis sensitivity of the resulting flexible, stitch-able sensor are discussed.
%0 Conference Paper
%1 10220416
%A Kumar, Nimal J.
%A Johnson, Alexander
%A Valsamakis, George
%A Gristock, J. Gene
%A Roggen, Daniel
%A Münzenrieder, Niko
%B 2023 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)
%D 2023
%K myown
%P 1-4
%R 10.1109/FLEPS57599.2023.10220416
%T A Comparison of High Dielectric Fillers for a Stitchable Flexible Capacitive Sensor
%U https://ieeexplore.ieee.org/document/10220416/
%X Flexible capacitive sensors are pervasive across multiple sectors, from healthcare to robotics. Although they offer better linearity and lower hysteresis, they require a large surface area to provide suitable sensitivity. One way of addressing this is through dielectric fillers. However, finding the right amount and type of filler is a challenge: the same material that improves a sensor's sensitivity can also cause detrimental changes in physical parameters. This paper describes how low-cost, high performing dielectric fillers - strontium titanate and barium titanate - can be introduced into Ecoflex to form a soft, sew-able sensor; and presents the concentrations of dielectric materials which offer both a good dielectric response, and the ability to pour the material and form the device. It highlights the advantages of barium titanate - which shows a better percentage dielectric constant increase - unless applications require the use of fine detail or cross-axis strain. The linearity, hysteresis, sensitivity, and cross-axis sensitivity of the resulting flexible, stitch-able sensor are discussed.
@inproceedings{10220416,
abstract = {Flexible capacitive sensors are pervasive across multiple sectors, from healthcare to robotics. Although they offer better linearity and lower hysteresis, they require a large surface area to provide suitable sensitivity. One way of addressing this is through dielectric fillers. However, finding the right amount and type of filler is a challenge: the same material that improves a sensor's sensitivity can also cause detrimental changes in physical parameters. This paper describes how low-cost, high performing dielectric fillers - strontium titanate and barium titanate - can be introduced into Ecoflex to form a soft, sew-able sensor; and presents the concentrations of dielectric materials which offer both a good dielectric response, and the ability to pour the material and form the device. It highlights the advantages of barium titanate - which shows a better percentage dielectric constant increase - unless applications require the use of fine detail or cross-axis strain. The linearity, hysteresis, sensitivity, and cross-axis sensitivity of the resulting flexible, stitch-able sensor are discussed.},
added-at = {2023-09-12T14:48:27.000+0200},
author = {Kumar, Nimal J. and Johnson, Alexander and Valsamakis, George and Gristock, J. Gene and Roggen, Daniel and Münzenrieder, Niko},
biburl = {https://www.bibsonomy.org/bibtex/291f86729ae33fd742c438dcf76bc623b/nikomu},
booktitle = {2023 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)},
doi = {10.1109/FLEPS57599.2023.10220416},
interhash = {42ae83183e21f3299abe4c9fb7406c97},
intrahash = {91f86729ae33fd742c438dcf76bc623b},
issn = {2832-8256},
keywords = {myown},
month = {July},
pages = {1-4},
timestamp = {2023-09-12T14:48:27.000+0200},
title = {A Comparison of High Dielectric Fillers for a Stitchable Flexible Capacitive Sensor},
url = {https://ieeexplore.ieee.org/document/10220416/},
year = 2023
}