Method and apparatus for power management of asset tracking system
AssigneeAsset Intelligence, LLC
InventorMark McAden
Life of this patent
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Abstract
A technique for controlling the state of a power supply in a mobile asset such as a cargo trailer. The technique detects motion status such as may be provided by a vibration sensor. The motion status signal is filtered by other signals, such as with inputs from a global positioning system sensor, and is then further used to select a power consumption mode. The power consumption mode may be further controlled based on configuration information that may indicate that a vibration source such as a refrigeration unit is present on the trailer.
Claims20
An apparatus for use in controlling the state of a power supply in a mobile asset comprising:
- a motion sensor for sensing vibration or motion, the motion sensor outputting one or more in-motion signals;
- a memory for storing a last known stationary location of the asset;
- a location device for identifying a current location of the asset;
- and
- a power controller for:
- determining whether said asset is in an In_Motion state based on said in-motion signals, causing said location device to identify a current location of the asset if it is determined that said asset is in an In_Motion state;
- and
- determining, if it is determined that said asset is in an In_Motion state, whether the asset is in an In_Transit state by comparing the current location of the asset and the last known stationary location, and selecting a power consumption mode for the power supply based on the determination.
A method for use in controlling the state of a power supply in a mobile asset comprising:
- storing a last known stationary location of the asset;
- enabling a motion sensor on the asset;
- monitoring the motion sensor output;
- determining whether the asset is in an In_Motion state based on the motion sensor output;
- if it is determined that said asset is in an In_Motion state,
- identifying a current location of the asset using a location device, and
- determining whether the asset is in an In_Transit state by comparing the current location of the asset with the last known stationary location;
- and
- selecting a power consumption power consumption mode for the power supply based on the in-transit determination.
Dependencies are inferred from the claim text.