Radar system, radar device, and monitoring method
In this example, a radar system is such that normally, each of a plurality of radar devices 100 - 1 to 100 - 6 monitors the monitoring area for the same using a radar signal that has been frequency modulated within a first modulation band, and when one of the plurality of radar devices 100 - 1 to 100 - 6 fails, at least one radar device (for example, radar device 100 - 1 ) adjacent to the radar device (for example, radar device 100 - 2 ) that has failed monitors the monitoring area of the radar device that has failed using a radar signal that has been frequency modulated within a second modulation band that is narrower than the first modulation band. As a result, even if one of the radar devices fails, it is possible to continue monitoring the monitoring area of the radar device.
1. A radar system, comprising:
a plurality of radar devices; and
a radar controller,
wherein the radar controller includes a processor and a memory storing instructions therein, the instructions, when executed by the processor, causing the processor to:
detect a failure of each of the plurality of radar devices;
if no failure is detected, control each of the plurality of radar devices to monitor its respective monitoring area using a radar signal frequency modulated with a first modulation band;
if failure is detected in any of the plurality of radar devices, control at least one radar device adjacent to the failed radar device to:
transmit a radar signal frequency modulated with the first modulation band for a first portion of its monitoring area that does not overlap with the monitoring area of the failed radar device; and
transmit a radar signal frequency modulated with a second modulation band for a second portion of its monitoring area that overlaps with the monitoring area of the failed radar device.
2. The radar system of claim 1 , wherein if failure is detected in any one of the plurality of radar devices, at least two radar devices adjacent to the failed radar device alternately monitor the monitoring area of the failed radar device.
3. A radar device configured to change a modulation band of a radar signal,
wherein, the radar device monitors its respective monitoring area using a radar signal frequency modulated with a first modulation band, and
in response to a determination that an adjacent radar has failed, the radar device transmits a radar signal frequency modulated with the first modulation band for a first portion of its monitoring area that does not overlap with the monitoring area of the failed radar device, and transmits a radar signal modulated with a second modulation band for a second portion of its monitoring area that overlaps with the monitoring area of the failed radar device.
4. A monitoring method using a radar system including a plurality of radar devices, the monitoring method comprising steps of:
detecting a failure of each of the plurality of radar devices;
if no failure is detected, controlling each of the plurality of radar devices to monitor its respective monitoring area using a radar signal frequency modulated with a first modulation band;
if failure is detected in any one of the plurality of radar devices, controlling at least one radar device adjacent to the failed radar device to:
transmit a radar signal frequency modulated with the first modulation band for a first portion of its monitoring area that does not overlap with the monitoring area of the failed radar device; and
transmit a radar signal frequency modulated with a second modulation band for a second portion of its monitoring area that overlaps with the monitoring area of the failed radar device.