| 摘要 |
A system (1) for monitoring the movement of an individual (2) comprises a portable device (5) to be worn by the individual, which communicates with a remote central controller (6) in the event of an emergency being determined by the portable device (5). The portable device (5) comprises a microprocessor (15) which determines the location of the device at predetermined monitoring intervals, typically of thirty second duration, using satellite and/or terrestrial global positioning systems. The portable device (5) as well as determining its location at the monitoring intervals also determines its speed and direction of travel, and compares each determined location, speed and direction of travel with corresponding predetermined parameters. In the event of any one of the determined location, speed or direction of travel of the portable device (5) falling outside a predetermined parameter, an alert signal is transmitted to the remote central controller (6), which in turn issues appropriate alerts to a computer (10), a fax machine (111), a landline telephone (12) and a mobile phone (13) of an authorised person and alerts the appropriate emergency services to the emergency. |
