| 摘要 |
A scanning method of an in-vehicle scanning-type radar for emitting beams subsequently to execute scanning and for detecting an object includes determining whether or not the object is in an approaching state. When it is determined that the object is not in the approaching state, executed is a first scanning for scanning within a first angle range. When it is determined that the object is in the approaching state, executed is a second scanning for scanning within a second angle range that is narrower than the first angle. A period during which the radar scans the second angle range once in the second scanning is shorter than that during which the radar scans the first angle range once in the first scanning.
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