SENSOR FOR USE WITH AUTOMATIC DOOR

摘要

Object: To provide an automatic door sensor which is inexpensive and still capable of freely setting a detection area. Solution: Light-emitters (14a-14d) cyclically emit and project light, and lenses (16a-16d) deflect emitted light in the direction perpendicular to a door opening. Light-receivers (22a1-22a9, 22b1-22b9) receive the projected light through segmented lenses (24a, 24b). For each of the light-emitters, a setting unit (44) sets therein whether each light-emitter should emit light. A control unit (30) judges whether a human or an object is present in a surveillance area based on the way how the light-receivers receive light.