Sensor fusion for passive keyless entry systems
AssigneeNXP B.V.
InventorsFilippo Casamassima, Wolfgang Eber
Life of this patent
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Abstract
An electronic key a vehicle is disclosed. The electronic key includes an inertial sensor, a microcontroller coupled to the inertial sensor and a transmitter/receiver coupled to the microcontroller. The microcontroller is configured to perform an operation, the operation includes detecting a motion, turning a radio of the transmitter/receiver on, determining that a distance to the vehicle is less than a preselected distance, determining an activity using a sensor fusion process, determining that the distance to the vehicle is decreasing and performing a preselected operation on the vehicle.
Claims13
An electronic key a vehicle, comprising:
- an inertial sensor;
- a microcontroller coupled to the inertial sensor;
- a transmitter/receiver coupled to the microcontroller;
- and
- wherein the microcontroller is configured to perform an operation, the operation includes detecting a motion, turning a radio of the transmitter/receiver on, determining that a distance to the vehicle is less than a preselected distance, determining an activity using a sensor fusion process, determining that the distance to the vehicle is decreasing and performing a preselected vehicle operation on the vehicle, wherein the turning on of the radio includes receiving a wake up signal from the vehicle and disregarding the wake up signal if the determined activity is not one of a predetermined activities.
Dependencies are inferred from the claim text.