| 摘要 |
<p>PROBLEM TO BE SOLVED: To make always easily correctable the deviation of the reference direction in the probing of an obstacle in an on-vehicle radar apparatus. SOLUTION: In this radar apparatus 4 which is mounted on a vehicle 1, radio waves of an FM-CW system are transmitted from an antenna 5, a reflected signal from a front vehicle 3 or the like is received, and an obstancle detecting device 7 detects an obstacle. When a road 2 is a curve, the direction of a probing beam 10 from the antenna 5 is changed from the front direction 1a by a rotating device 6. When the reference direction of the probing beam 10 from the antenna 5 is deviated from the front direction 1a, a direction correction device 8 controls a high-frequency transmitter-receiver, continuous waves at a set frequency are transmitted from the antenna 5. A reflected signal from the road surface of the road 2 is received. The reference direction of the antenna 5 is corrected on the basis of a direction in which the reception intensity of the reflected signal becomes maximum.</p> |
