| 摘要 |
A variety of sensors, such as mechanical triggers, light sensors and motion sensors, magnetic sensors, and radio frequency identification tags, are strategically placed throughout a motor vehicle to detect service and maintenance activities relating to the vehicle during the lifetime of the vehicle. A sensed activity then activates a suitable recording device, such as a video recorder, to record the activity. The completion of the activity likewise is sensed and causes deactivation of the recording device. The recorded activity is typically retained in a non-erasable, indexed storage device from which it can be easily retrieved. The sensors may also be used for tamper detection and vehicle motion detection.
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