Obstacle recognition system in a motor vehicle

• US 6,100,796 A
• Filed: 02/11/1999
• Issued: 08/08/2000
• Est. Priority Date: 02/11/1998
• Status: Expired due to Term

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: Horst, Walter, Wagner, Armin
• Primary Examiner(s): POPE, DARYL C
• Application Number:
  US09/248,289
• Time in Patent Office: 544 Days
• Field of Search: 340/435, 340/436, 340/903, 340/904, 701/301
• US Class Current: 340/435
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 15/931 of land vehicles
• CPC Class Codes: G01S 2007/52009 of sensor obstruction, e.g. dirt- or ice-coating
• CPC Class Codes: G01S 2013/9323 Alternative operation using light waves
• CPC Class Codes: G01S 2013/9324 Alternative operation using ultrasonic waves

Abstract

In an obstacle recognition system in a motor vehicle with an electronic control device and with sensors to detect the distance of an obstacle in a predetermined area, the control device, in a defined partial area of a part, possibly mounted on the vehicle, that could be detected by a sensor as an obstacle, in the event of an actual obstacle being recognized in this partial area, in a first step determines the distance of the obstacle. In a second step, the control device checks to see whether this distance is changing. The alarm that is usually triggered as a function of the distance of the obstacle is suppressed if the distance of the obstacle detected in the defined partial area does not change.

Claims

1. An obstacle recognition system in a motor vehicle, comprising:

at least one sensor for detecting a distance to an obstacle within a predetermined area;

an electronic control device coupled to the at least one sensor, said control device including means for determining in a first step the distance to an obstacle within a defined partial area within the predetermined area for a component which may be mounted on the vehicle and could be recognized by the at least one sensor as the obstacle, and

means for checking in a second step whether the distance to the obstacle is changing, thereby determining that the obstacle is mounted on the vehicle if the distance to the obstacle does not change.

2. The obstacle recognition system according to claim 1, further comprising an alarm coupled to the electronic control device, an alarm signal of the alarm which is usually triggered as a function of the distance to the obstacle being suppressed if the distance to the obstacle detected in the defined partial area does not change.

3. A method of operating an obstacle recognition system in a motor vehicle, the system including a sensor system operable to detect distances to obstacles within a predetermined area, the method comprising the acts of:

determining whether an obstacle is in a defined partial area within the predetermined area, in which components that are possibly mounted on the vehicle may be arranged;

if such an obstacle is recognized, then firstly determining a distance to the obstacle and secondly determining whether the distance varies; and

determining that the obstacle is mounted on the vehicle if the distance to the obstacle does not vary.

4. The method according to claim 3, further comprising the act of suppressing an alarm signal if the distance to the obstacle detected in the defined partial area does not vary.

5. A method of operating an obstacle recognition system in a motor vehicle, the system including a sensor system operable to detect distances to obstacles within a predetermined area, the method comprising the acts of:

recognizing an obstacle within a defined partial area within the predetermined area, in which parts that are possibly mounted on the vehicle may be arranged;

determining a distance to the obstacle;

determining whether the distance to the obstacle is changing; and

determining that the obstacle is mounted on the vehicle if the distance to the obstacle does not change.

6. The method according to claim 5, wherein the act of determining whether the distance to the obstacle is changing is performed by determining the distance to the obstacle at successive points in time and comparing the detected distances.

9. The method according to claim 5, further comprising the act of:

suppressing an alarm signal, normally triggered as a function of the distance to the obstacle, if the distance to the obstacle detected in the defined partial area does not change.

7. A software product for operating an obstacle recognition system which includes a sensor system operable to detect distances to obstacles within a predetermined area, comprising:

a computer readable medium having stored thereon a program code segment that;

recognizes an obstacle within a defined partial area within the predetermined area, in which parts that are possibly mounted on the vehicle may be arranged;

determines a distance to the obstacle;

determines whether the distance to the obstacle is changing; and

determines that the obstacle is mounted on the vehicle if the distance to the obstacle does not change.

8. The software product according to claim 7, further wherein the computer readable medium has stored thereon a program code segment that suppresses an alarm signal if the distance to the obstacle detected in the defined partial area does not vary.