| 摘要 |
<p>A data logging system for recording data on the usage of a vehicle operating from a station includes a responder (10) for location near a gateway (56) of the station, and a data logger (20) for location in the vehicle; the responder (10) including a vehicle detector (11) for detecting movement of a vehicle, and a transmitter (12) to transmit an identification signal (13) identifying the responder (10); the data logger (20) including a receiver (21) for receiving the identification signal, and a memory (22) to record responder identification data. The vehicle detector (10) may be a magnetometer to detect changes in magnetic field strength as a vehicle moves nearby. The data logger (20) may include a compass (41) to provide an indication of direction of travel and a vehicle operation sensor (47) or vehicle occupant sensor.</p> |
