Three-Dimensional Modeling of Insulin Pen for Multi-Electrode Capacitive Sensing

This work is devoted to the three-dimensional modeling and evaluation of multi-electrode capacitive sensing, in an insulin pen used by diabetic persons, for insulin dose precise detection. To this purpose a fully parameterized model has been developed in ANSYS for the insulin pen containing a smart cap which hosts the electrodes, used for the capacitive measurement and therefore dose detection. Different electrode configurations have been evaluated, including 3, 4, 6 and 8 electrodes. The numerical values of the electrode capacitances have been extracted using Maxwell 3D for all the configurations proposed.