Patent ID: 11921186
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 24:
25. A method for detecting a failure of a radar device that includes: at least one transmitter to generate a transmission chirp signal synchronized with a timing signal; and at least two receivers to each receive a reflected wave and a direct wave of the transmission chirp signal emitted from the transmitter, each generates a reception chirp signal, and each performs mixing on a received signal, using the reception chirp signal, the reception chirp signal being synchronized with the timing signal and having the same slope as the transmission chirp signal, the radar device detecting a target on the basis of a beat signal resulting from the mixing performed by the receivers, and the method comprising:
emitting the transmission chirp signal from the transmitter;
receiving a direct wave of the transmission chirp signal and detecting a level of a direct wave component in a level of the beat signal; and
determining a failure of the radar device on the basis of a result of comparison between the level of the direct wave component and a threshold, the threshold being set on the basis of a beat signal level measurement under an environment that eliminates the reflected wave component in advance.