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Title:
OBSTRUCTION ALARM DEVICE FOR VEHICLE
Document Type and Number:
Japanese Patent JP3487054
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To generate an alarm correctly even in a place such as the inlet-outlet of a curve where the radius of the proceeding curve of an own vehicle changes.
SOLUTION: The estimated proceeding curve La (radius Rea) of an own vehicle is obtained on the basis of measuring points (X1, Y1)-(X5, Y5) of an obstruction so as to set an alarm area WA1a surrounded by a pair of circular arcs formed by moving the curve La parallelly by ±1m and a pair of straight lines Y=Y1, Y=Y5. In the same way, the estimated proceeding curve Lb (radius Reb) of the own vehicle is obtained on the basis of measuring points (X3, Y3)-(X5, Y5) so as to set an alarm area WA1b surrounded by a pair of circular arcs formed by moving the curve Lb parallelly by ±1m and a pair of straight lines Y=Y1, Y=Y5. At the inlet-outlet of the curves, the radii Rea, Reb differ, and the alarm areas WA1a, WA1b differ. A collision is therefore judged only when the same obstruction exists in common in both alarm areas WA1a, WA1b for the specified time or longer.


Inventors:
Shirai, Takamasa
Hibino, Katsuhiko
Nishimura, Takao
Application Number:
JP1995000339620
Publication Date:
January 13, 2004
Filing Date:
December 26, 1995
Export Citation:
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Assignee:
DENSO CORP
International Classes:
B60R21/00; B60K28/10; B60Q5/00; B60W30/00; B60W40/10; B60W40/109; G01S7/295; G01S13/60; G01S13/93; G01S17/88; G01S17/93; G08B21/00; G08G1/16; F16H59/66; (IPC1-7): B60R21/00; G01S13/93; G08G1/16
Attorney, Agent or Firm:
足立 勉