| 摘要 |
A frequency modulated continuous wave (FMCW) radar device transmits a transmission signal having a first increasing portion (Tbu) for which the frequency sequentially increases with a first modulation slope, a first decreasing portion (Tbd) for which the frequency sequentially decreases with the first modulation slope, a second increasing portion (Tau) for which the frequency sequentially increases with a second modulation slope that is different from the first modulation slope, and a second decreasing portion (Tad) for which the frequency sequentially decreases with the second modulation slope. For each of the beat signals (Tbu, Tbd, Tau, and Tad) acquired in response to the transmission, frequencies for a plurality of peaks (P1 to P8) are identified. Groups are made, each of which is made by extracting one peak, of the identified plurality of peaks (P1 to P8), from each of the beat signals (Tbu, Tbd, Tau, and Tad), and on the basis of the presence of a group (P5 to P8) for which all peaks in the same group fit into the same frequency range, notification is made of a vibration in a power source bias circuit. |
