| 摘要 |
A method and system (10) utilize both the radio frequency (RF) and infrared (IR) parts of the electro-magnetic spectrum to locate subjects (i.e. objects and persons) within a tracking environment. The system includes a battery- operated, microprocessor-based badge (12) for each subject to be located. Ea ch badge automatically transmits digitized infrared light signals to provide a fine determination of its subject's location. Each badge transmits RF and IR signals upon actuation of a page request/alert push button switch (42) on it s badge. The IR and RF signals are modulated or encoded with badge identification data, page request or alert notification data, and battery condition data. The system also includes ceiling or wall sensors in the form of IR (20) and RF (26) receivers, and a host computer (36). The locating method and system are particularly useful in hospitals to monitor the locati on of patients and/or critical equipment.
|
