| 摘要 |
The alarm system (10) comprises a master device (12) and a plurality of slave devices (14), which are controlled by said master device (12). Each slave device can be installed in a region and comprises: a signalling apparatus (16) to provide an alarm indication detectable by the people standing in said area, and a control organ (18) that can be activated by an operator in case of danger. Each slave device activates its own signalling apparatus and transmits an emergency signal to the master device , when its own control organ is activated. The master device transmits an activation signal to the slave devices as a function of the emergency signal. The slave devices activate their own signalling device when they receive the activation signal. The devices transmit and receive the signals through a wireless telecommunication network. |
