system for monitoring persons.

摘要

A personnel monitoring system (30) includes a transmitting or transponding unit (44) that is worn or carried by the individual being monitored, and which periodically, or upon request, transmits a uniquely encoded signal (42) that identifies the person being monitored, as well as information about the condition or activities or the person being monitored as sensed by sensors (43), coupled to the transmitting unit (44). The system also includes a field monitoring device (FMD) (40), that is positioned near the person being monitored, or at a location where the person being monitored should be found and a central processing unit (CPU) (34), that automatically, or by request, receives and interprets data from the FMD. A communication link between the FMD and the CPU may be by way of existing telephone lines (36) or other telecommunicative links.