| 摘要 |
<p>A fire detection system includes a number of integrated alarm/detection units (2) mounted in different locations. A control unit (1) transmits and receives radio signals to and from the alarm/detection units (2). Each alarm/detection unit (2) has a fire detector and an alarm for generating an audible or visible alarm signal. The unit includes a local control processor (5) connected in common to the detector and to the alarm. A radio transceiver is connected to the local control processor. The alarm/detection unit has a battery power supply. The control processor (5) is arranged to switch ON in a predetermined time slot, and when ON to switch between an idle mode and an active mode. The processor when in the active mode transmits to the control unit data indicative of the operational status of the alarm/detection system. <IMAGE></p> |
