Communications: directive radio wave systems and devices (e.g. – Combined with diverse type radiant energy system
Reexamination Certificate
2006-11-22
2008-10-07
Tarcza, Thomas H. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Combined with diverse type radiant energy system
C342S070000, C342S118000, C382S103000, C382S106000
Reexamination Certificate
active
07432848
ABSTRACT:
There are provided an inter-vehicle distance detecting device and an inter-vehicle distance detecting method which can precisely measure an inter-vehicle distance from a user's own vehicle to a neighboring vehicle even if a radar becomes unable to detect the neighboring vehicle due to the influence of multipath or the like. If the radar does detect a neighboring vehicle, a width of the neighboring vehicle is calculated based on a precise inter-vehicle distance determined by the radar and a precise vehicle visual angle determined from an image taken by a camera, and is stored in a memory, and if the radar becomes unable to detect the neighboring vehicle, an inter-vehicle distance to the neighboring vehicle is calculated according to a trigonometric function based on the precise width of the neighboring vehicle previously stored in the memory and a precise vehicle visual angle determined from an image taken by the camera at this time.
REFERENCES:
patent: 5633705 (1997-05-01), Asayama
patent: 6900754 (2005-05-01), Ono et al.
patent: 7042389 (2006-05-01), Shirai
patent: H6-230115 (1994-08-01), None
patent: 2002327635 (2002-11-01), None
Alpine Electronics Inc.
Brinks Hofer Gilson & Lione
Galt Cassi
Tarcza Thomas H.
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