Patent ID: 9606261
Date: 2017-03-28
CPC Classifications: G01J,G01P,G01V,G07C

Claim:
1. A room entry and exit detection apparatus comprising: a person detection sensor configured to detect a person in an area facing one surface of a door; an open and close detection sensor configured to detect whether the door is in an open state or in a closed state; an open-state person detection information recorder, wherein when a state of the door detected by the open and close detection sensor switches from a closed state to an open state, the open-state person detection information recorder is configured to record whether the person detection sensor is detecting a person or not at that point in time; a closed-state person detection information recorder, wherein when the state of the door detected by the open and close detection sensor switches from the open state to the closed state, the closed-state person detection information recorder is configured to record whether the person detection sensor is detecting a person or not at that point in time; a power saving control unit configured to switch an operation state and a non-operation state of the person detection sensor by controlling electric power supply to the person detection sensor, when the state of the door detected by the open and close detection sensor is switched from the closed state to the open state, the power saving control unit switches the person detection sensor into the operation state, and when the open-state person detection information recorder records whether the person detection sensor is detecting presence of the person or not at that point in time, the power saving control unit switches the person detection sensor into the non-operation state, and when the state of the door detected by the open and close detection sensor switches from the open state to the closed state, the power saving control unit switches the person detection sensor to the operation state, and when the closed-state person detection information recorder records whether the person detection sensor is detecting presence of the person or not at that point in time, the power saving control unit switches the person detection sensor into the non-operation state, the power saving control unit switches the person detection sensor into the non-operation state.