Inventors:
Robert J. Carroll - Plano TX
Roger A. Keller - Livonia MI
E. James Lane - Highland MI
Freddie G. Williams - Huntington Beach CA
Assignee:
Eaton Corporation - Cleveland OH
International Classification:
G08G 104, G08C 1700, H04B 900
Abstract:
A vehicle monitor (10) apparatus for monitoring vehicles (14) in a monitoring location (17). A vehicle unit (12) mountable in a vehicle includes circuitry (21) for transmitting, on a continuous repetitive basis, information characterizing the vehicle and unique thereto. In addition, a monitoring unit (16) mountable at the monitoring location includes circuitry (33) for receiving information transmitted by the vehicle unit. Such monitoring circuitry includes an infrared light receiver (29) and a preamplifier with ambient light compensation circuitry (100) connected thereacross.