Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Patent
1995-05-24
1996-11-12
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
342115, 342 90, 342157, 342158, G01S 1393, G01S 1360
Patent
active
055744630
ABSTRACT:
A radar device emits a wave beam into a given angular range outside a vehicle, and scans the given angular range by the wave beam. The radar device detects a reflected wave beam. A recognizing device is operative for recognizing an obstacle with respect to the vehicle on the basis of the result of detection of the reflected wave beam by the radar device. In the recognizing device, a point recognizing section recognizes obstacles as points, and a uniting section is operative for uniting adjacent points among the points provided by the point recognizing section. The uniting section provides sets each having adjacent points. A line-segment recognizing section is operative for detecting a specific set or specific sets of adjacent points among the adjacent-point sets provided by the uniting section, and for recognizing every detected specific set as a line segment having a length only along a width direction of the vehicle. Every specific set has a length smaller than a given length along a longitudinal direction of the vehicle. A position estimating section estimates the position of a line segment, which will be provided by the line-segment recognizing section, in response to the position of a previously-provided line segment. An identity judging section is operative for comparing the line-segment position estimated by the position estimating section and the position of a line segment currently provided by the line-segment recognizing section to judge whether or not the line segment currently provided by the line-segment recognizing section and the previously-provided line segment are the same.
REFERENCES:
patent: 3952303 (1976-04-01), Watanabe et al.
patent: 4203113 (1980-05-01), Baghdady
patent: 5291207 (1994-03-01), Kikuchi et al.
Hibino Katsuhiko
Nishimura Takao
Shirai Noriaki
Nippondenso Co. Ltd.
Sotomayor John B.
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