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Accelerometer and voltage based key-on and key-off detection

  • US 9,449,435 B2
  • Filed: 10/23/2013
  • Issued: 09/20/2016
  • Est. Priority Date: 10/23/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving, by a device, accelerometer measurements associated with a vehicle;

    receiving, by the device, voltage measurements associated with a power source connected to the vehicle;

    determining, by the device, a key-on status or a key-off status of the vehicle based on the accelerometer measurements or the voltage measurements without communicating with a vehicle diagnostic system associated with the vehicle,the key-off status corresponding to an engine of the vehicle being powered off, and the key-on status corresponding to the engine of the vehicle being powered on;

    initiating, by the device, communications with the vehicle diagnostic system to obtain first vehicle data based on determining the key-on status;

    receiving the first vehicle data based on initiating the communications with the vehicle diagnostic system;

    validating the key-on status if the first vehicle data received from the vehicle diagnostic system indicates the engine of the vehicle is powered on; and

    receiving second vehicle data, different than the first vehicle data, from the vehicle diagnostic system based on validating the key-on status.

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