Influence of Electrode Positions on Performance of Hand Motion Capture Using EIT

This paper reports the influence of electrode positions on the performance of hand motion capture conducted by using an electrical impedance tomography (EIT) device. We developed a simulator using a linear elastic and conductive model of the forearm and evaluated the sensitivity and redundancy of the EIT signals for various electrode configurations. The results of the simulation indicated that electrode positions affect the sensitivity and redundancy; specifically, the placement of grounding and sensing electrodes on the anterior side with high density has twice the sensitivity of the equally spaced placement. Furthermore, results of the subjective experiment where 1 healthy male participated matched the simulation results and suggested that the two-row electrode placement on the anterior side with high density has high sensitivity. These findings are useful for future accurate hand motion capture using an EIT device.