| 摘要 |
A personal alarm system can be worn or carried by the user, may be activated at any time by the user and/or may be automatically activated to send a signal to any remote monitoring station on the network. The device identifies the user as well as the user's location within the monitored area. The alarm-sending unit is designed to fit within a box the size of a small cell phone or pager. The unit includes an ID memory for identifying the user, is programmable and has an on-board processor for generating a signal to a wireless transmitter for sending the signal to a to a local receiver for inputting the signal onto the network. A centralized, networked RF receiver is used with the personal alarm unit and one or more of these RF receivers may be installed in order to provided adequate coverage of the monitored area. The signals generated by the personal alarm are received by the RF receiver(s) and decoded, whereupon the system processor assembles a message, packetizes it as necessary, and sends it to one or more monitoring stations via the intervening network and network interface. The signals may be digitized where desired. A beacon generator may be used to identify location of the portable unit. The system may also employ a GPS generator to identify location.
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