Methods and systems related to remote power loss detection
First Claim
1. A method comprising:
- charging a supercapacitor of an onboard device coupled to an asset, the charging from a source of power of the asset; and
thendetecting tampering with the onboard device by a complete loss of power from the source of power, the detecting by the onboard device; and
after the complete loss of powerutilizing power from the supercapacitor to send a message by wireless transmission, the message including an indication of a last known voltage provided by the source of power prior to the complete loss of power.
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Abstract
Remote power loss detection. At least some of the example embodiments are methods including: tracking location of an asset by an onboard device mechanically coupled to the asset, the onboard device electrically coupled to a source of power of the asset, and the onboard device receiving power from the asset; charging a supercapacitor coupled to the onboard device; and then detecting a complete loss of power provided to the onboard device, and the detecting by the onboard device; and after the complete loss of power sending a message by wireless transmission, the sending based on power derived from the supercapacitor, and the message including an indication of a last known voltage provide by the asset prior to the complete loss of power, and the sending by the onboard device after the complete loss of power.
236 Citations
15 Claims
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1. A method comprising:
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charging a supercapacitor of an onboard device coupled to an asset, the charging from a source of power of the asset; and
thendetecting tampering with the onboard device by a complete loss of power from the source of power, the detecting by the onboard device; and
after the complete loss of powerutilizing power from the supercapacitor to send a message by wireless transmission, the message including an indication of a last known voltage provided by the source of power prior to the complete loss of power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An onboard device configured to couple to an asset, the onboard device comprising:
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a processor; a wireless interface coupled to the processor; a global position receiver coupled to the processor; a means for providing power coupled to the processor; a memory coupled to the processor, the memory storing a program that, when executed by the processor, causes the processor to; receive signals indicative of a location of the onboard device; detect a complete power loss to the onboard device; and
thensending a message by way of the wireless interface, the sending powered by the means for providing power, and the message including an indication of a last known voltage provided by the asset prior to the complete power loss. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification