| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide the radio transmission system capable of linking all radio units and attaining low power consumption. <P>SOLUTION: The radio transmission system includes a plurality of radio units TR1 and TR2, each of which includes a transmitting and receiving portion 2 for transmitting and receiving radio signals, a fire sensor 4 for detecting outbreak of fire, and a control portion 1 for controlling the transmitting and receiving portion 2 to transmit radio signals including a notification message for notifying the outbreak of the fire when the fire is detected by the fire sensor 4. The radio unit TR 1 is employed as a master, and the remaining radio units TRs 2 are employed as slaves. The master TR 1 is arranged at an area where the transmitting range of radio signals is overlapped for all of the slave TRs 2. The transmitting and receiving portion 2 of the master TR 1 contains all of the slave TRs 2 within its transmitting range of radio signals. When the transmitting and receiving portion 2 of the master TR 1 receives the radio signals including the notification message, the control portion 1 of the master TR 1 controls the transmitting and receiving portion 2 to transmit the radio signals including the notification message. <P>COPYRIGHT: (C)2009,JPO&INPIT |
