| 摘要 |
<p>A system for transmitting data by sensing certain monitored events, in particular for physically sense-impaired persons. The system comprises at least one transmitter (20) connected to at least one event sensor (10, 12) for transmitting a radio signal comprising a carrier when an event is sensed, and a user-portable receiver (38) that sets off an alarm in response to the radio signal. Each of said monitored events is identified by a unique code for modulating the radio signal carrier. Said receiver (38) can identify the event from the code once the radio signal has been demodulated, so that the correspondence between the event and the alarm is on a one-to-one basis.</p> |
