Method and device for signaling the presence of a potential obstacle, such as a pedestrian, to a vehicle driver, and in particular a machine driver

A method for signaling a potential obstacle, such as a pedestrian (P), to a vehicle driver (V), notably a machine driver, wherein:

• each obstacle (P) is equipped with transmission means (Em), referred to as a transmitter, adapted to supply a presence signal of said obstacle,
• each vehicle (V) is equipped with means (Re), referred to as a receiver, for receiving the presence signals transmitted by the transmitters (Em) of the obstacles (P),
• and alarm means (24, 26) are triggered when an obstacle (P) is present in the vicinity of a vehicle (V),
• wherein the following are used:
• transmitters (Em) comprising two at least substantially orthogonal transmit antennas (A1, A2), and supply means (1-5) adapted to supply quadrature-phase signals to said antennas,
• and receivers (Re) comprising two at least substantially orthogonal receive antennas (Ax, Ay).

A device for signaling a potential obstacle, such as a pedestrian (P), to a vehicle driver (V), notably a machine driver, wherein it comprises:

• adapted for equipping each obstacle (P):
• transmission means (Em), referred to as a transmitter, suitable for supplying a presence signal of said obstacle,
• adapted for equipping each vehicle (V):
• means (Re), referred to as a receiver, for receiving the presence signals transmitted by the transmitters (Em) of the obstacles (P),
• and alarm means (24, 26) adapted to be triggered when an obstacle (P) is present in the vicinity of a vehicle (V),
• wherein:
• each transmitter (Em) comprises two at least substantially orthogonal transmit antennas (A1, A2), and supply means (1-5) adapted to supply quadrature-phase signals to said antennas,
• and each receiver (Re) comprises two at least substantially orthogonal receive antennas (Ax, Ay).