Pedestrian walking characteristics at stairs according to width change for application of piezoelectric energy harvesting

This work aims at finding pedestrian walking characteristics at U-type stairs according to the width change of stairs and appropriate spot for installing piezoelectric energy harvesting. The number of pedestrian at two kinds of stairs （one is stairs with 1.5 m in width and the other is stairs with 3 m in width） was estimated by calculating the number of steps on the stairs by a zone which is divided into 30 cm-30 cm. The result shows high density in the middle in the case of narrow stairs but traffic is concentrated on stair inside （pillar side） in stairs with large width. In conclusion, the location for installation of piezoelectric energy harvesting system should be considered differently on stairs width and the number of installation depends on total expected traffic and the expected traffic for a device.