METHOD USING ULTRA HIGH FREQUENCY WAVES FOR LOCATING A PORTABLE DEVICE GIVING "HANDS FREE" ACCESS TO A VEHICLE, ASSOCIATED LOCATING DEVICE AND PORTABLE DEVICE
First Claim
Patent Images
1. Method for locating a portable device (P′
- ) for the “
hands free”
access to a vehicle (V′
) by a location device (D′
) intended to the installed in the vehicle (V′
), the said portable device (P′
) communicating with the said location device (D′
) by ultra high frequency waves, the method comprising at every transmission of an ultra high frequency signal by the location device (D′
);
simultaneously transmitting by the location device (D′
) at least three successive ultrasonic signals coming from three separate sources, intended for the portable device (P′
),measuring a delay (Δ
t) between each first time of reception (t1) of the ultra high frequency signal and each second time of reception (t2) for each ultrasonic signal transmitted by the portable device (P′
),determining a position between the portable device (P′
) and the location device (D′
) on the basis of the delays thus measured.
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Accused Products
Abstract
Disclosed is a method for locating a portable device giving “hands free” access to a vehicle, by a location device intended to be installed in the vehicle, the portable device communicating with the location device by ultra high frequency waves, the invention consisting at each transmission of an ultra high frequency signal by the location device: of simultaneously transmitting by the location device at least one ultrasonic signal, intended for the portable device; of measuring a delay between a first time of reception of the ultra high frequency signal and un second time of reception of the ultrasonic signal by the portable device; of determining a distance between the portable device and the location device on the basis of the delay thus measured. Also disclosed is a location device and a corresponding portable device.
17 Citations
9 Claims
-
1. Method for locating a portable device (P′
- ) for the “
hands free”
access to a vehicle (V′
) by a location device (D′
) intended to the installed in the vehicle (V′
), the said portable device (P′
) communicating with the said location device (D′
) by ultra high frequency waves, the method comprising at every transmission of an ultra high frequency signal by the location device (D′
);simultaneously transmitting by the location device (D′
) at least three successive ultrasonic signals coming from three separate sources, intended for the portable device (P′
),measuring a delay (Δ
t) between each first time of reception (t1) of the ultra high frequency signal and each second time of reception (t2) for each ultrasonic signal transmitted by the portable device (P′
),determining a position between the portable device (P′
) and the location device (D′
) on the basis of the delays thus measured.
- ) for the “
-
2. Device (D′
- ) for the location of a portable device giving “
hands free”
access to a vehicle (V′
), intended to be installed in the said vehicle (V′
), the said portable device (P′
) communicating with the said location device (D′
) by ultra high frequency waves, the location device (D′
) comprising;means of sequential transmission (M3) of three ultrasonic signals simultaneously with the transmission of three ultra high frequency signals intended for the portable device (P′
),means of reception (M2) of a delay (Δ
t) between a first time of reception (t1) of each ultra high frequency signal and un second time of reception (t2) of each ultrasonic signal by the portable device (P′
),means of computation (M1) of a distance (d) between the portable device (P′
) and the location device (D′
) on the basis of the delay (Δ
t) thus received. - View Dependent Claims (6, 8)
- ) for the location of a portable device giving “
-
3. Portable device (P′
- ) for “
hands free”
access to a vehicle, intended to be located by a location device (D′
), the said portable device (P′
) communicating with the said location device (D′
) by ultra high frequency waves, the portable device (P′
) comprising;means of reception (M6) of three ultrasonic signals, means of measuring (M4) a delay (Δ
t) between a first time of reception (t1) of each ultra high frequency signal and a second time of reception (t2) of each ultrasonic signal,means of transmission (M5) of the delay (Δ
t) thus measured to the location device (D′
).
- ) for “
-
4. Device (D′
- ) for locating a portable device giving “
hands free”
access to a vehicle (V′
), intended to be installed in the said vehicle (V′
), the said portable device (P′
) communicating with the said location device (D′
) by ultra high frequency waves, the said location device (D′
) comprising;means of sequential transmission (M3) of three ultrasonic signals simultaneously with the transmission of three ultra high frequency signals intended for the portable device, means of reception of a distance (d) between the portable device (P′
) and the location device (D′
) coming from the portable device (P′
). - View Dependent Claims (7, 9)
- ) for locating a portable device giving “
-
5. Portable device (P′
- ) giving “
hands free”
access to a vehicle, intended to be located by a location device (D′
), the said portable device (P′
) communicating with the said location device (D′
) by ultra high frequency waves, the portable device (P′
) comprising;means of reception (M6) of three ultrasonic signals, means of measuring (M4) a delay (Δ
t) between a first time of reception (t1) of each ultra high frequency signal and a second time of reception (t2) of each ultrasonic signal by the portable device (P′
),means of computation of a distance (d) between the portable device (P′
) and the location device (D′
) on the basis of the delay (Δ
t) thus computed,means of transmission (M5) of the said distance (d) to the location device (D′
).
- ) giving “
Specification
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Current AssigneeContinental Automotive France (Continental AG), Continental Automotive GmbH (Continental AG)
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Original AssigneeContinental Automotive France (Continental AG), Continental Automotive GmbH (Continental AG)
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InventorsBENBOUHOUT, Rachid, GODET, Sylvain
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current
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CPC Class CodesB60R 2325/10 Communication protocols, co...B60R 2325/205 Mobile phonesB60R 25/24 using electronic identifier...G01S 11/16 using difference in transit...G01S 5/26 Position of receiver fixed ...G01S 5/30 Determining absolute distan...G07C 2009/00769 with data transmission perf...G07C 2209/63 Comprising locating means f...G07C 9/00309 operated with bidirectional...H04B 11/00 Transmission systems employ...
