| 摘要 |
<p>The present invention relates to a tracking system especially for persons suffering from a memory disorder. In a system according to the present invention each person belonging within the sphere of the system is fitted with a portable personal monitoring unit (10) containing a receiver component (28) and a transmitter component (30) connected by radio to an alarm unit (12) included in the system. The monitoring unit sends a message to the alarm unit, for example, when a person belonging within the sphere of monitoring exits from a permissible operating area (14). The alarm unit sends the messages onward to a monitoring room (22) included in the system, where necessary measures, such as searches, are undertaken. In the system according to the present invention the monitoring unit can be set into a standby state, whereupon only the receiver component is in operation, or an operating state, whereupon the transmitter component is also in operation. The monitoring unit is set into the operating state when the monitored person has exited from the operating area. At other times the monitoring unit is in the standby state, whereupon its current consumption is very low. In the present invention, setting the monitoring device into the standby state or operating state takes place automatically by means of activating units (16) and deactivating units (18) included in the system, which are situated along passageways (20) leading to the operating area. Data transmission from said units to the monitoring unit takes place by means of inductive data transmission. The system according to the present invention also includes a locating unit (26) for locating a monitoring unit in the operating state.</p> |
