Obstacle detection device for vehicle

Details Obstacle detection device for vehicle Obstacle detection device for vehicle

2005-06-07

2005-06-07

Gregory, Bernarr E. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Testing or calibrating of radar system

By monitoring

C342S052000, C342S053000, C342S054000, C342S070000, C342S165000, C342S175000, C342S195000, C180S167000, C180S169000, C356S004010

Reexamination Certificate

active

06903680

ABSTRACT:
If the maximum time width Lt of the intensity of received light of reflected waves from a vehicle ahead is smaller than a reference time width, it is judged that the vehicle ahead is positioned in proximity to the detection limit distance of an obstacle detection device for vehicle. Thus, there is no problem, for example, even if a cut-in vehicle is present in reality between the vehicle ahead and the vehicle of interest and nevertheless, the distance to the cut-in vehicle cannot be detected. It can be judged whether the vehicle ahead is positioned in proximity to the detection limit distance of the device by judging the magnitude relation between Lt and the reference time width. As a result, the detecting capability of the device can be judged with accuracy.

REFERENCES:
patent: 4950075 (1990-08-01), Ichinose et al.
patent: 5235315 (1993-08-01), Cherry et al.
patent: 5574463 (1996-11-01), Shirai et al.
patent: 5627511 (1997-05-01), Takagi et al.
patent: 6147637 (2000-11-01), Morikawa et al.

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