Frequency multiplexed impedance measurement through send-and-receive nodes for conductive 3D-print characterisation

Schaap, Nick (2025)

Electrical impedance tomography (EIT) is a technology that is currently almost exclusively found in the medical field, where it is used to determine the impedance distribution in the body. It is used as a diagnostic tool to inspect the electrical characteristics of the body. EIT typically uses numerous electrodes attached to the body, where only a single electrode is used as a sending node whilst all other nodes are used to determine the path impedance to the sending node. This paper explores an EIT measurement in which all nodes operate as send and read electrodes simultaneously through frequency multiplexing. Various improvements of this design and explorations of its application for the use in in-situ monitoring of 3D-printing of conductive materials are also provided.