| 摘要 |
<P>PROBLEM TO BE SOLVED: To restrain consumption of a battery built in a sensor unit in a load controller in which the sensor unit equipped with a human body sensor is separated from a main body and a detection signal is transmitted and received between the sensor unit and the main body wirelessly by using a radio wave. <P>SOLUTION: When a human body sensor 11 detects presence of a human, a first radio communication unit 13, in response to detection of presence of a first human, transmits a detection signal twice to a second radio communication unit 22 of a main body 2 separated from a sensor unit 1 at the same frequency. After this, while the human body sensor 11 keeps detecting presence of the human, the first radio communication unit 13 transmits the detection signal once to the second radio communication unit 22 at the frequency at a prescribed time interval. <P>COPYRIGHT: (C)2012,JPO&INPIT |
