Patent ID: 9175962
Filing Date: 2015-11-03
Classification: G01C

Abstract:
1. A pedestrian observation system comprising: an acceleration detection element configured to acquire acceleration information in accordance with a terminal coordinate system that accompanies a pedestrian and is defined uniquely; a horizontal direction detection element configured to obtain a power of an acceleration in a horizontal plane based on an acceleration component in a first direction perpendicular to a vertical direction and an acceleration component in a second direction perpendicular to the vertical direction and the first direction, that are obtained from the acceleration information acquired by the acceleration detection element, thereby acquiring a time of observation of a maximum value of the power, an acceleration component in the first direction at the time of the observation of the maximum value of the power, and an acceleration component in the second direction at the time of observation of the maximum value of the power to acquire horizontal peak information; a vertical direction detection element configured to acquire, based on the acceleration information acquired by the acceleration detection element, times of observation of a maximum value and a minimum value of the acceleration in the vertical direction to acquire vertical peak information; a peak analysis element configured to choose, based on the vertical peak information acquired by the vertical direction detection element, information related to the maximum value of the power contained in the horizontal peak information acquired by the horizontal direction detection element, to acquire peak information for estimation; and a direction of travel estimation element configured to acquire traveling direction information indicating a direction of travel of the pedestrian based on the peak information for estimation acquired by the peak analysis element.