Radar device, vehicle, and object position detection method
AssigneeMurata Manufacturing Co., Ltd.
InventorsKatsuhisa Kashiwagi, Nobuyuki Nozawa
Life of this patent
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Abstract
A radar device includes a radar unit, a signal processing unit, a GPS receiver, and a storage unit. The signal processing unit acquires, for each target, a distance (R) to the target and a relative velocity (Veff) between the radar unit and the target when the radar unit is moving. The signal processing unit separately detects positions of a plurality of targets by using a separation algorithm in which a difference between the relative velocities (Veff) is used. When the radar unit is stopped, the signal processing unit corrects the position of each target detected when the radar unit has been moving, based on a current position of the radar unit stored in the storage unit, and identifies the positions of the plurality of targets.
Claims14
A radar device comprising:
- a radar configured to acquire data of a plurality of stationary objects;
- a processor;
- a current position acquisition unit configured to acquire a current position of the radar;
- and
- memory configured to store the current position of the radar,
- wherein when the radar is moving, the processor is configured to:
- acquire, for each of the plurality of objects, a distance to the object, and a relative velocity between the radar and the object based on the acquired data, and
- separately detect positions of the plurality of objects based on a difference between the relative velocities, and
- wherein when the radar is stopped, the processor is configured to:
- correct the positions of the objects detected when the radar was moving, based on the current position of the radar unit stored in the memory, and
- identify the positions of the plurality of objects.
An object position detection method for a radar device comprising a radar configured to acquire data of a plurality of stationary objects, the method comprising:
- acquiring a current position of the radar and storing the current position of the radar in a memory of the radar device;
- when the radar is moving:
- calculating, by a processor of the radar device, for each of the plurality of objects, a distance to the object and a relative velocity between the radar and the object based on the data acquired by the radar;
- and
- separately detecting, by the processor, the positions of the plurality of objects based on a difference between the relative velocities, and
- when the radar is stopped:
- correcting, by the processor, the positions of the plurality of objects detected when the radar unit was moving, based on the current position of the radar stored in the memory of the radar device, and
- identifying, by the processor, the positions of the objects.
Dependencies are inferred from the claim text.