| 摘要 |
<p>A location ticking device kepi by a parent is used with a location reporting device worn by the child in which both the tracking device and the location reporting device both have a short range radio signal transceiver and a GPS location receiver -and the reporting device also has a cellular data transmitter and a controller. The locator has a cellular data transceiver and a display screen. If the locator and the reporter become separated by more than a prescribed distance, the reporting device GPS receiver sends data from the receiver through the cellular transmitter to an internet accessible receiver, which provides a visual display on the parents locator screen indicating the relative positions of parent and child.</p> |
