Patent ID: 11879962
Assignee: ZF FRIEDRICHSHAFEN AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. Method for unambiguously determining the speed of an object (16) on a radar measuring system (10), comprising:
mapping a first antenna pair (22d) including a first transmitting antenna (12a) and a first receiving antenna (14d) to a position on a virtual antenna arrangement (20),
mapping a second antenna pair (24a) including a second transmitting antenna (12b) and a second receiving antenna (14a) to the position on the virtual antenna arrangement (20) to,
transmitting from the first transmitting antenna (12a) successive frequency modulated segments (30a) of radar waves having a first time interval (t1),
transmitting from the second transmitting antenna (12b) successive frequency modulated segments (30b) of radar waves having a second time interval (t2) identical to the first time interval (t1),
wherein the segment (30a) of the first transmitting antenna (12a) has a third time interval (t3) with respect to the segment (30b) of the second transmitting antenna (12b),
detecting an object (16) using the first and second segments (30a, 30b) transmitted from the first antenna pair (22d) and the second antenna pair (24a),
determining the distance of the detected object (16) and a first ambiguous speed value having a first phase (Ψ1) with the first antenna pair (22d) and a second ambiguous speed value having a second phase (Ψ2) with the second antenna pair (24a), and
determining a third phase (Ψ3) for the possible speeds of the speed values based on the third time interval (t3) with
the speed of the third phase (Ψ3) closest to the difference between the first phase (Ψ1) and the second phase (Ψ2) corresponding to the actual speed of the object (16).