Power management systems for automotive video event recorders

摘要

Video event recorders are coupled to a vehicle power source via an on-board diagnostic system including its power bus, data bus, and scanner port connector. Video event recorders are provided with a power input arranged in conjunction with a standard ODBII type “D” connector. Systems further include an extension cable between the connector and the vehicle event record to accommodate mounting needs associated with each. In advanced versions, both OBD power and data networks are coupled to the vehicle event recorded such that data relating to vehicle diagnostic systems can be captured in a triggered event along with video data. In addition, some versions are provided with special detection mechanism to determine the use state of a vehicle and adjust application of power accordingly. Thus an “in-use” detector is coupled to the vehicle and/or OBD systems to provide feedback which helps to conserve power and regulate the power connections.

主权项

1. A vehicle electrical power management system coupled with a vehicle, the power management system comprising:
an electrical power source; an on-board diagnostics system coupled with the electrical power source configured to receive electrical power from the electrical power source via an on-board diagnostics system power bus; a video event recorder including a power input electrically coupled to the on-board diagnostics system power bus; and a power management module electrically coupled to the on-board diagnostics system power bus and arranged between the on-board diagnostics system and the video event recorder, wherein the power management module comprises an in-use detector and a switch, the switch arranged on a power supply line between the electrical power source and the video event recorder, the in-use detector configured to determine whether the vehicle is in use and:
responsive to determining that the vehicle is in use, activate the switch such that power is provided to the video event recorder; andresponsive to determining that the vehicle is not in use, deactivate the switch such that, responsive to the switch being deactivated, the video event recorder is left unpowered.