초록 ▼

A personal alarm monitor system provides for the recording of a record of locations of a person as the person travels through a designated premises having a series of designated areas interconnected by portals or gateways, such as doorways. The person carries a receiver capable of receiving broadcas

A personal alarm monitor system provides for the recording of a record of locations of a person as the person travels through a designated premises having a series of designated areas interconnected by portals or gateways, such as doorways. The person carries a receiver capable of receiving broadcasts from a series of preferably low-power transmitters specifically located throughout the premises. Pairs of transmitters are located at each gateway, one transmitter being placed in each of the adjacent designated areas to broadcast a signal primarily into the designated area about the gateway. Additional unpaired transmitters may be located at additional locations in the designated areas. Each transmitter is assigned and broadcasts a unique code corresponding to its location and status as either a gateway or non-gateway tag. A portable receiver, carried by a person whose location is to be monitored, receives the unique code broadcasts from the transmitters and processes the code data to validate the position it represents. When validated, the code is stored by the receiver. A list of the validated codes can be downloaded or transmitted to a remote location for tracking purposes.

대표청구항 ▼

1. Apparatus for monitoring the location of a person within a monitored premises having a plurality of designated areas interconnected by gateways, comprising: a plurality of radio frequency transmitters located throughout said monitored premises, at least one of said transmitters being located in e

1. Apparatus for monitoring the location of a person within a monitored premises having a plurality of designated areas interconnected by gateways, comprising: a plurality of radio frequency transmitters located throughout said monitored premises, at least one of said transmitters being located in each designated area, each of said transmitters broadcasting a signal comprising a unique code identifying the transmitter; and a portable receiver carried by the person capable of receiving the signals broadcast by each of the transmitters, said portable receiver having means for determining the code of a broadcast received, processing said code to determine its validity as representing a position within the monitored premises in close proximity to the person, and storing a validated code as a record of the location of the person at the time of the reception thereof, said processing means comprising means for comparing the code received to a list of previously received and stored codes corresponding to a record of previous other locations for the person and determining whether the received code corresponds to a valid location for the person based upon a logical relationship between the position associated with the received code and the record of previous other locations.