| 摘要 |
PROBLEM TO BE SOLVED: To supply power to wireless equipment such as an actuator requiring large power by an open-space wireless power distribution method while observing radio-wave protection guidelines. SOLUTION: A plurality of person detecting sensors 6 are installed in an indoor space 1. In a wireless power supply device 2, it is determined whether a person is present in the indoor space 1 on the basis of the detection result from the plurality of person detecting sensors 6. When determined that a person is present in the indoor space 1, a detection area with a closest distance to the wireless power supply device 2 out of the detection areas of the person detecting sensors 6 detecting the presence of a person is made as a shortest area while a small-power electromagnetic wave determined as a value less than or equal to power PWsafe, which is unlikely to affect a human body, according to the shortest area is transmitted to the indoor space. When determined that no person is present in the indoor space 1, an electromagnetic wave having larger power than the PWsafe is transmitted to the indoor space 1. COPYRIGHT: (C)2011,JPO&INPIT
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