| 摘要 |
<p>A location device (10) comprises a location detection and processing module (12) which is preferably a global positioning device for receiving satellite signals. Module (12) outputs position data in the form of a digitally encoded signal to a control processor (14) coupled to an activation device (16). Processor (14) further processes the signal received from processor (12) to provide a signal to a voice synthesiser (20) in a form the synthesiser can recognize and convert to a voice data signal stating the position of device (10) in terms of latitude and longitude. Synthesiser (20) sends that signal to a transmitter (22) which transmits the signal as an over the air voice signal. The control processor may also send the digitally encoded voice data to a transmitter (22) or to a transmitter (23) for direct transmission to a central authority. The device may include an activation module (16) for activating the device response to a specific stimulus, such as contact with water, loss of a communication signal from a communications network or a rapid change of altitude.</p> |
