Collision judging system for vehicle

• US 5,680,117 A
• Filed: 03/10/1995
• Issued: 10/21/1997
• Est. Priority Date: 11/19/1993
• Status: Expired due to Fees

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Sugiyama, Akira, Arai, Toshiaki, Fujita, Yasuhiko
• Primary Examiner(s): Crosland, Donnie L.
• Application Number:
  US08/401,502
• Time in Patent Office: 956 Days
• Field of Search: 340/403, 340/435, 340/436, 180/167, 180/169, 342/455, 342/41, 342/29, 364/461
• US Class Current: 340/903
• CPC Class Codes: B60K 31/0008 including means for detecting potential obstacles in vehicle path
• CPC Class Codes: B60T 7/22 initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle , or by means of contactless obstacle detectors mounted on the vehicle
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 2013/93185 Controlling the brakes
• CPC Class Codes: G01S 2013/932 using own vehicle data, e.g. ground speed, steering wheel direction
• CPC Class Codes: G01S 2013/93271 in the front of the vehicles

Abstract

A collision judging system for a vehicle includes a sensor for detecting a relative speed between a subject vehicle and an object, and a judging section for judging a possibility of collision of the subject vehicle with the object based on the relative speed. In the collision judging system, when an output from the differentiating device exceeds a preset value, a signal indicative of a command to prohibit the judgment of the possibility of collision in the judging section is outputted from the prohibiting-signal outputting device, thereby avoiding the unnecessary judgment of the possibility of collision in the judging section.

Claims

1. A collision judging system for a vehicle, comprising:

a sensor for detecting a relative speed between a subject vehicle and an object; and

a judging section for judging a possibility of collision based on said relative speed;

wherein

said system further includes;

a differentiating means for differentiating the relative speed detected by said sensor; and

a prohibiting-signal outputting means for outputting a signal indicative of a command to prohibit the judgment of the possibility of collision in said judging section, when an output from said differentiating means exceeds a preset value.

2. A collision judging system for a vehicle according to claim 1, wherein said sensor includes a distance measuring unit for measuring a distance between the subject vehicle and the object, and a calculating means for differentiating distance data delivered from said distance measuring unit to provide the relative speed, and said collision judging system further includes a data processing section having said differentiating means and said prohibiting-signal outputting means and interposed between said sensor and said judging section, said data processing section including:

a detection data estimating means for estimating a current value of said relative speed based on a past distance data delivered from said distance measuring unit;

a change-over signal outputting means for outputting a change-over signal, when the distance data delivered from said distance measuring unit or the relative speed delivered from said calculating means is suddenly varied; and

a detection data change-over means for changing the relative speed to a value estimated by said detection data estimating means to supply said value to said differentiating means in response to the output of the change-over signal from said change-over signal outputting means.

4. A collision judging system for a vehicle according to claim 1, 2 or 3, further including a detection data changing means for forcibly changing the detection data to "0", when the prohibiting signal is outputted from said prohibiting-signal outputting means.

3. A collision judging system for a vehicle, comprising a sensor for detecting a relative motion parameter between a subject vehicle and an object, and a judging section for judging a possibility of collision based on the detection data detected by said sensor, wherein

said collision judging system further includes:

a steering angle detector for detecting a steering angle;

a differentiating means for differentiating the detection value detected by said steering angle detector; and

a prohibiting-signal outputting means for outputting a signal indicative of a command to prohibit the judgment of the possibility of collision in said judging section, when an output from said differentiating means exceeds a preset value.