Locating system for autistic child and others

A system for locating a lost or missing person, animal or package comprising:

• a cellular telephone unit which can be activated by an activating RF signal and which emits a pulsed WiFi or other cellular telephone unit RF signal following activation by the activating RF signal and which is adapted to be affixed to or worn by the person, animal or package;
• a smart phone capable of transmitting the activating RF signal and having a visual display screen, a compass and an accelerometer;
• a locating application installed in the smart phone and being capable of measuring the strength of the WiFi or other cellular telephone unit RF signal, taking compass direction readings, taking accelerometer distance readings and computing smart phone location relative to the cellular telephone unit location by triangulation wherein the triangulation points include relative locations of the smart phone to the cellular telephone unit;
• the cellular telephone unit has GPS/Assisted GPS capability and the smart phone further comprises a GPS/Assisted GPS application and the locating application further comprises triangulation capability using as triangulation points several closest cell phone towers to the cellular telephone unit and/or locations of nearby WiFi or other third party RF signals;
• and
• a WPAN application with paging capability incorporated in the cellular telephone unit which is manually actuatable by the smart phone following activation by the activating RF signal;
• wherein a RF wireless connection is maintained between the cellular telephone unit and the smart phone as long as said cellular telephone unit and smart phone are within a specified range;
• when the range is exceeded the connection is broken whereupon the activating RF signal is transmitted by the smart phone, the RF signal is pulsed to conserve energy and upon activation of the cellular telephone unit a first WiFi or other cellular telephone unit RF signal strength is computed with respect to a first smart phone location, and upon movement of the smart phone a second smart phone location is computed with respect to the first smart phone location by means of the compass and accelerometer readings, then a second WiFi or other cellular telephone unit RF signal strength is computed and the location of the cellular telephone unit relative to the second smart phone location is computed by triangulation and displayed on the visual display screen and/or wherein, using the GPS/Assisted GPS capability upon activation of the cellular telephone unit, the approximate location of the lost or missing person, animal or package is determined by the GPS/Assisted GPS application and/or by cell phone tower triangulation.