Human body is charged during walking. Continuous monitoring of the body voltage has been made using an induction electrode set on ceiling of a room. The induced voltage is dependent on material of shoes, as expected, and in average, the value is a few hundred volt. The induced voltage of 500 V can cause lift off of particles deposit on surface when finger, or part of body is closed. Suspended particles could also be attracted electrostatically, causing higher chance of infection. The induced voltage waveform is different for person or manner of walking, even the same foot-wear is used. In this study, spectrum analysis was made on the acquired voltage, and frequency component was compared. The voltage spectrum of 4 different persons, and 3 different walking patterns of one person were obtained, and their correlation was compared. The results indicate that the spectrum is different with person. Among the tested 4 persons, identification can be made using the correlation of the induced voltage while walking. This monitoring method is simple, and can be used to monitor safety against electrostatic hazard.
展开▼
