Activating and deactivating sensors for dead reckoning
First Claim
Patent Images
1. A mobile device comprising:
- an inertial sensor configured to provide inertial sensor data;
a processing device; and
a storage device storing computer-executable instructions which, when executed by the processing device, cause the processing device to;
identify that the mobile device is within an entrance anchor location associated with a dead zone;
activate the inertial sensor in response to arrival of the mobile device at the entrance anchor location;
identify that the mobile device is within an exit anchor location associated with the dead zone;
determine that a delay has elapsed since identifying that the mobile device is within the exit anchor location, the delay comprising a threshold amount of time during which the mobile device is not within the dead zone; and
deactivate the inertial sensor in response to determining that the delay has elapsed and the device has not re-entered the dead zone.
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Abstract
An identification is made as to when a device is at an anchor location, which can be a proximity zone along an edge of a dead zone or a location where a signal from a beacon is detected. In response to the device being at the anchor location, one or more inertial sensors can be activated and data from the one or more inertial sensors collected to determine a position of the device using dead reckoning. Alternatively, in response to the device being at the anchor location, a determination is made as to when to deactivate one or more inertial sensors from which data is collected to determine the position of the device using dead reckoning.
379 Citations
20 Claims
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1. A mobile device comprising:
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an inertial sensor configured to provide inertial sensor data;
a processing device; anda storage device storing computer-executable instructions which, when executed by the processing device, cause the processing device to; identify that the mobile device is within an entrance anchor location associated with a dead zone; activate the inertial sensor in response to arrival of the mobile device at the entrance anchor location; identify that the mobile device is within an exit anchor location associated with the dead zone; determine that a delay has elapsed since identifying that the mobile device is within the exit anchor location, the delay comprising a threshold amount of time during which the mobile device is not within the dead zone; and deactivate the inertial sensor in response to determining that the delay has elapsed and the device has not re-entered the dead zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A mobile device comprising:
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an inertial sensor configured to provide inertial sensor data;
a processing device; anda storage device storing computer-executable instructions which, when executed by the processing device, cause the processing device to; identify that the mobile device is at an anchor location associated with a dead zone; determine, based at least in part on the mobile device being at the anchor location, that the inertial sensor will be deactivated after a dead reckoning fidelity interval that begins when the mobile device departs the anchor location and enters the dead zone, the dead reckoning fidelity interval indicating a duration of time in which a position of the mobile device is provided with an acceptable estimated accuracy by dead reckoning; perform the dead reckoning using the inertial sensor data to determine the position of the mobile device; and deactivate the inertial sensor after the dead reckoning fidelity interval. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method performed by a device having an inertial sensor, the method comprising:
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identifying that the device is at a first anchor location, the first anchor location being associated with a proximity zone along an edge of a dead zone; activating the inertial sensor in response to the device being at the first anchor location; collecting data from the inertial sensor to determine a position of the device using dead reckoning; identifying when the device is at a second anchor location, the second anchor location being associated with the proximity zone along the edge of the dead zone or with a second proximity zone along another edge of the dead zone; determining to deactivate the inertial sensor based at least in part on a delay occurring after the device is identified as being at the second anchor location; and deactivating the inertial sensor in response to determining that the delay has occurred and the device has not re-entered the dead zone.
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Specification