Patent ID: 8955253
Filing Date: 2015-02-17
Classification: B66B,E05F,E05Y

Abstract:
1. A sensor for use with an automatic door, comprising: detecting means forming a plurality of detection spots arranged two-dimensionally on a floor surface near a door, each of said detection spots being capable of detecting a person or an object by means of infrared light independently from other detection spots; distinguishing means distinguishing a region formed by a plurality of adjacent ones of said detection spots detecting said person or object; judging means judging a direction in which said distinguished region moves; and output means outputting a signal which causes said door to be opened only when the direction of movement of said distinguished region is a direction toward said door; wherein: said judging means computes the direction of movement of said distinguished region on the basis of a location of the center of gravity of said distinguished region; and the center of gravity of said distinguished region is the centroid of said distinguished region offset toward said detecting means by a predetermined amount.