Method for opening/closing of a secure hands-free access by detection of movement of a lower member of a user
First Claim
1. A method for opening/closing an access (102) in hands-free access mode made secure by detection of movement of a lower member (3, 4) of a user by a remote access system, this access system comprising at least two means of detection (1, 2) which each emit a signal whose variations (10, 12;
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31, 33, 35) are analyzed, the method comprising;
validating detection of a movement of the lower member of the user (3, 4) by application of a double verification step according to a criterion for identification of a form of variation (F2) of each signal'"'"'s derivative function with a model form of said movement (23), and according to a criterion for simultaneity of detection of the forms of variation (25) identified on the signal'"'"'s derivative function,wherein the form of variation (F2) to be verified includes points (A, B,) between two slopes of opposite signs of V-shaped type,wherein the identification criterion comprises detecting times (tA, tB) of critical changes in variation of slope inclination of the form of variation (F2), corresponding to a first one of said points (A) and a second one of said points (B) of the form of variation (F2), in order to acquire values of the critical changes in variation of slope inclination (dAsA, dAsB) at the first point (A) and at the second point (B),determining values of a ratio R of variation in instantaneous amplitude and of duration EtA of travel of the form of variation (F2), andcomparing (61, 63, 59) these values of critical variations in slope inclination (dAsA, dAsB), of the ratio R of variation in amplitude, and of duration EtA of the form of variation (F2) with predefined threshold values (Amin, Bmin;
Etmax;
Rmin).
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Accused Products
Abstract
A reliable and secure activation of an access based on a detection of movement in a remote access system by providing a secure method for opening/closing of an access in hands-free access mode. The detection of movement relates to the displacement of a lower member of a user by a remote access system, this access system including at least two elements of detection which each emit a signal whose variations (31, 33, 35) are analyzed. The detection of a movement of a lower member is validated by the application of a double verification step according to parameters (dAsA, dAsB) of a criterion for identification (tA, tB; dAsA, dAsB) of a form of variation (F2; A, B) of each signal (31, 33, 35) with a model form of the movement, and according to a criterion for simultaneity of detection of the forms of variation (F2) identified on the two signals.
18 Citations
12 Claims
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1. A method for opening/closing an access (102) in hands-free access mode made secure by detection of movement of a lower member (3, 4) of a user by a remote access system, this access system comprising at least two means of detection (1, 2) which each emit a signal whose variations (10, 12;
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31, 33, 35) are analyzed, the method comprising;
validating detection of a movement of the lower member of the user (3, 4) by application of a double verification step according to a criterion for identification of a form of variation (F2) of each signal'"'"'s derivative function with a model form of said movement (23), and according to a criterion for simultaneity of detection of the forms of variation (25) identified on the signal'"'"'s derivative function, wherein the form of variation (F2) to be verified includes points (A, B,) between two slopes of opposite signs of V-shaped type, wherein the identification criterion comprises detecting times (tA, tB) of critical changes in variation of slope inclination of the form of variation (F2), corresponding to a first one of said points (A) and a second one of said points (B) of the form of variation (F2), in order to acquire values of the critical changes in variation of slope inclination (dAsA, dAsB) at the first point (A) and at the second point (B), determining values of a ratio R of variation in instantaneous amplitude and of duration EtA of travel of the form of variation (F2), and comparing (61, 63, 59) these values of critical variations in slope inclination (dAsA, dAsB), of the ratio R of variation in amplitude, and of duration EtA of the form of variation (F2) with predefined threshold values (Amin, Bmin;
Etmax;
Rmin). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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31, 33, 35) are analyzed, the method comprising;
Specification