| 摘要 |
PROBLEM TO BE SOLVED: To automatically adjust a transmission level at a beacon side and to secure an original communication range by obtaining the reception level of radio wave or light, which is received by means of radio wave means and transmitting its reception level information to a beacon. SOLUTION: Radio wave transmitted from a beacon antenna 23 is received by the antenna 11 of a radio communication monitoring equipment 21, and a radio wave part and a control part periodically transmits reception level information of received radio wave to the bacon antenna 23. Thus, on a beacon 26 side, the reception level information is received so that it is discriminated as to whether or not radio communication by means of the beacon 26 is in a normally executing state. For example, when both kinds of information data for the reception level received at the beacon side from the two radio communication monitoring equipments are 0 in the reception level or drastically low, it is discriminated that 'the fault of the beacon antenna 23 or a fault in a radio transmission part in the beacon equipment 22' has occurred so that fault information is reported to a host device 24. |
