| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wireless power distribution system supplying electric power to a radio apparatus such as an actuator of requiring large electric power, and preventing a malfunction of other systems operating in an indoor space, in an open space wireless power distribution system, while observing a radio wave protective guideline. Ž<P>SOLUTION: A wireless power supply device 2 determines whether a person stays in the indoor space 1, and transmits an electromagnetic wave of small electric power of a degree of not having influence on the human body to the indoor space 1 when determining that the person stays in the indoor space 1, and transmits the electromagnetic wave of large electric power to the indoor space 1 when determining that the person does not stay in the indoor space 1. When transmitting the electromagnetic wave of the large electric power, allowable transmission power causing no malfunction by the other systems existing in the indoor space 1 is taken into consideration, and for example, the minimum allowable transmission power among them, is set as a preset value. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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