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Trip recorder operation and memory retention extension through multiple battery backup and a load shedding strategy triggered by a primary power interruption
Trip recorder operation and memory retention extension through multiple battery backup and a load shedding strategy triggered by a primary power interruption
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机译:通过多次备用电池和一次电源中断触发的减载策略,行程记录器的操作和内存保留扩展
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摘要
A dual battery backup system which provides power to selected portions of a trip recorder according to a load shedding strategy to maximize duration of operation and data retention in the event of interruption of primary power supply. The trip recorder is divided into three subsystems; a central processing unit, input/output and memory/clock subsystems. In the event of interruption of power from the vehicle battery, backup power is supplied to all systems according to a load shedding strategy. Power supplied to the input/output subsystem and the central processing unit are interrupted after the passage of predetermined amounts of time. The memory subsystem receives power after all other subsystems have been shed enabling memory retention for a period of up to ten years.
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