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Motor vehicle key location system using wireless signal

  • US 10,104,499 B2
  • Filed: 02/23/2017
  • Issued: 10/16/2018
  • Est. Priority Date: 02/23/2017
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a transceiver system that includes a plurality of transceivers, wherein the transceiver system is configured to (i) transmit, using a first transceiver of the plurality of transceivers, a location request signal to a user identification device (UID), (ii) receive, using the plurality of transceivers and in response to the UID receiving the location request signal, a position signal transmitted from the UID, and (iii) measure, using the plurality of transceivers, a plurality of angles of arrival, wherein the plurality of angles of arrival is based on the position signal and each angle of arrival corresponds to one transceiver of the plurality of transceivers; and

    a controller in communication with the plurality of transceivers, wherein the controller is configured to, using a processor executing instructions stored in a non-transitory memory, (i) receive the plurality of angles of arrival, (ii) determine a location of the UID based on the plurality of angles of arrival, (iii) determine a distance between the UID and a vehicle based on the location of the UID, (iv) compare the distance with a distance threshold, and (v) activate at least one of an ignition system of the vehicle and a locking system of the vehicle based on the comparison; and

    wherein the controller is further configured to determine an outdoor temperature, compare the outdoor temperature with at least one of a minimum temperature threshold and a maximum temperature threshold, and increase the distance threshold when at least one of the outdoor temperature is below the minimum temperature threshold and the outdoor temperature is above the maximum temperature threshold.

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