US 10,889,266 B2
Method and system for detecting the presence of a human hand on a motor vehicle opening element
Sylvain Godet, Saint-Cezert (FR); and Stéphane Billy, Grenade (FR)
Assigned to Continental Automotive France; and Continental Automotive GmbH
Appl. No. 16/482,007
Filed by Continental Automotive France, Toulouse (FR); and Continental Automotive GmbH, Hannover (DE)
PCT Filed Feb. 9, 2018, PCT No. PCT/FR2018/050322
§ 371(c)(1), (2) Date Jul. 30, 2019,
PCT Pub. No. WO2018/154211, PCT Pub. Date Aug. 30, 2018.
Claims priority of application No. 17 51424 (FR), filed on Feb. 23, 2017.
Prior Publication US 2020/0361415 A1, Nov. 19, 2020
Int. Cl. B60R 25/31 (2013.01); H03K 17/945 (2006.01); B60R 25/01 (2013.01); H01Q 1/32 (2006.01)
CPC B60R 25/31 (2013.01) [B60R 25/01 (2013.01); H03K 17/945 (2013.01); H01Q 1/3241 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for detecting the presence of a human hand on an opening element of a motor vehicle using a first ultra-high-frequency transceiver device, installed in said opening element, and a second ultra-high-frequency transceiver device, for the purpose of activating a function of said vehicle, said method comprising:
transmission, by the first ultra-high-frequency transceiver device, of a plurality of detection signals,
reception, by the second ultra-high-frequency transceiver device, of each detection signal of said transmitted plurality of detection signals,
measurement, by the second ultra-high-frequency transceiver device, of the power of each received detection signal,
determination of a power variation profile on the basis of the measured received power values, and
detection of the presence of a human hand on the opening element when the determined profile corresponds to a predetermined reference profile, said predetermined reference profile being characterized by an increase followed by a first decrease in the received power value, characterizing the approach of a human hand, followed by a stagnation and a second decrease in the power value, characterizing contact of a human hand with the opening element of the vehicle.