| 摘要 |
<P>PROBLEM TO BE SOLVED: To minimize a door opening time by rapidly closing a door, when a person moves in the direction of getting away from the door, in air-conditioning management of a building. <P>SOLUTION: A plurality of optical sensors 20 for detecting the presence or absence of an object (person) existing on a passage surface F on which the door 1 is installed, and a control means 30 for giving a control signal for opening/closing to the door 1 on the basis of an output signal of the detection/nondetection of the object, which is output from each of the optical sensors 20, are provided. A plurality of monitoring rows L1-L5 parallel to the door 1 are set on the at least one-side passage surface of the passage surface F by each of the sensors 20. The control means 30 gives a closing signal to the door 1, after the output signal of the optical sensor 21 for monitoring the monitoring row L1 in immediate proximity to the door 1 is switched to an OFF-state of the nondetection of the object from an ON-state of the detection of the object, in the opened state of the door 1, when the closing signal is given to the door 1 when a time series of the object detection signals output from the respective optical sensors 20 is an order in a direction making the person get away from the door 1. <P>COPYRIGHT: (C)2011,JPO&INPIT |
