Vehicle warning system and method based on speed differential

• US 6,337,638 B1
• Filed: 04/25/2000
• Issued: 01/08/2002
• Est. Priority Date: 04/25/2000
• Status: Expired due to Term

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: International Business Machines Corporation
• Inventors: Tomashek, Michael Martin, Bates, Cary Lee
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): TANG, SON M
• Application Number:
  US09/558,316
• Time in Patent Office: 623 Days
• Field of Search: 340/435, 340/438, 340/901, 340/904, 340/436, 340/903
• US Class Current: 340/904
• CPC Class Codes: B60K 31/0008 including means for detecting potential obstacles in vehicle path
• CPC Class Codes: B60W 2554/00 Input parameters relating to objects
• CPC Class Codes: B60W 2554/406 Traffic density
• CPC Class Codes: B60W 2554/802 Longitudinal distance
• CPC Class Codes: B60W 2554/804 Relative longitudinal speed
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 2013/9314 Parking operations
• CPC Class Codes: G01S 2013/9317 Driving backwards
• CPC Class Codes: G01S 2013/932 using own vehicle data, e.g. ground speed, steering wheel direction
• CPC Class Codes: G01S 2013/9321 Velocity regulation, e.g. cruise control
• CPC Class Codes: G01S 2013/9325 for inter-vehicle distance regulation, e.g. navigating in platoons
• CPC Class Codes: G01S 2013/93271 in the front of the vehicles
• CPC Class Codes: G01S 2013/93272 in the back of the vehicles
• CPC Class Codes: G08G 1/096725 where the received information generates an automatic action on the vehicle control
• CPC Class Codes: G08G 1/09675 where a selection from the received information takes place in the vehicle
• CPC Class Codes: G08G 1/096791 where the origin of the information is another vehicle

Abstract

The present invention provides a method, apparatus and article of manufacture for detecting the presence of one or more target vehicles and determining a distance and speed of the targeted vehicles relative to a targeting vehicle. When predetermined threshold conditions are satisfied, warning signals are output from a computer system to alert a driver of the one or more targeted vehicles. In addition, steps may be taken to determine whether the targeting vehicle and the one or more targeted vehicles will converge to create a congested condition. If so, the speed of the targeting vehicle maybe adjusted.

Claims

1. A computer system, comprising:

a detection system disposable on a vehicle and configured for rearward and forward detection of at least a speed of at least two target vehicles relative to the vehicle;

a cruise control system;

one or more output devices configured to receive a warning signal;

a signal processing unit coupled to the detection system and the cruise control system and configured to;

transmit the warning signal when a speed of a detected target vehicle is greater than a threshold speed relative to the vehicle;

determine whether the vehicle and the at least two target vehicles will create a congestion area; and

change a speed setting of the cruise control when it is determined that the congestion area will be created.

2. The computer system of claim 1, wherein the one or more output devices are disposed on rearview mirrors of the vehicle.

3. The computer system of claim 1, wherein the signal processing unit is configured to determine whether the vehicle and the at least two target vehicles will create the congestion area based on trajectories of the vehicle and the at least two target vehicles.

4. The computer system of claim 1, wherein the signal processing unit is configured to determine whether the vehicle and the at least two target vehicles will create the congestion area based on relative speeds between the vehicle and the at least two target vehicles.

5. The computer system of claim 1, wherein the congestion area is created when at least one of the vehicle and the at least two target vehicles is required to adjust vehicle speed.

6. The computer system of claim 1, wherein the vehicle detection system comprises a front detection system and a rear detection system.

7. The computer system of claim 6, wherein the front detection system is configured to detect a speed and a range of target vehicles in a first region forward of the vehicle and wherein the rear detection system is configured to detect a range and speed of target vehicles in a second region rearward of the vehicle.

8. The computer system of claim 1, wherein the signal processing unit is configured to detect each of the at least two target in separate lanes of a road.

9. The computer system of claim 1, wherein the signal processing unit is configured to increase the speed setting of the cruise control when the congestion condition is determined.

10. A signal bearing medium containing a program which, when executed by one or more processors, causes the processors to perform steps comprising:

detecting at least a first target vehicle and a second target vehicle;

determining whether either of the first target vehicle and the second target vehicle is approaching a targeting vehicle at a speed greater than a threshold speed; and

if the speed is greater than the threshold speed, outputting a warning signal from an output device disposed on the targeting vehicle;

determining whether the first target vehicle, the second target vehicle and the targeting vehicle will converge to create a congestion condition;

if so, changing a speed setting of the targeting vehicle from an initial speed setting and then returning the targeting vehicle to the initial speed setting.

11. The signal bearing medium of claim 10, wherein outputting a warning signal from the output device comprises activating a warning device disposed on a rearview mirror of the targeting vehicle.

12. The signal bearing medium of claim 10, wherein the first target vehicle is detected forward of the targeting vehicle and the second target vehicle is detected rearward of the targeting vehicle.

13. The signal bearing medium of claim 12, wherein changing a speed setting of the targeting vehicle from an initial speed setting comprises increasing the speed setting.

14. The signal bearing medium of claim 10, wherein detecting the first target vehicle and the second target vehicle comprises detecting the first target vehicle in a first lane of a road and detecting the second target vehicle in a second lane of the road.

15. A method for operating a target vehicle detection system disposed on a targeting vehicle, comprising:

detecting at least a first target vehicle and a second target vehicle;

determining whether either of the first target vehicle and the second target vehicle is approaching the targeting vehicle at a speed greater than a threshold speed; and

if the speed is greater than the threshold speed, outputting a warning signal from an output device disposed on the targeting vehicle;

determining whether the first target vehicle, the second target vehicle and the targeting vehicle will converge to create a congestion condition; and

if so, changing a speed setting of the targeting vehicle from an initial speed setting and then returning the targeting vehicle to the initial speed setting.

16. The method of claim 15, wherein detecting at least the first target vehicle and the second target vehicle comprises detecting the first target vehicle in a region rearward of the targeting vehicle and the second target vehicle in a region forward of the targeting vehicle.

17. The method of claim 15, wherein outputting a warning signal from the output device comprises activating a warning device disposed on a rearview mirror of the targeting vehicle.

18. The method of claim 15, wherein detecting the first target vehicle and the second target vehicle comprises detecting the first target vehicle in a first lane of a road and detecting the second target vehicle in a second lane of the road.

19. The method of claim 15, wherein the first target vehicle and the second target vehicle are in separate lanes and the targeting vehicle is in a common lane with one of the first and second vehicles.

20. A vehicular detection system, comprising:

(a) a detection system disposable on a targeting vehicle and configured to detect at least a speed of at least a first target vehicle and a second target vehicle relative to the detection system;

(b) a signal processing unit coupled to the detection system and configured to;

determine whether the speed of at least one of the first and second target vehicles is greater than a threshold speed relative to the detection system; and

if the speed is greater than the threshold speed, determine whether the first target vehicle, the second target vehicle and the detection system will converge to create a congestion condition; and

(c) a cruise control system connected to the signal processing unit;

wherein the signal processing unit is configured to change a speed setting of the cruise control when the congestion condition is determined.

21. The vehicular detection system of claim 20, wherein the detection system comprises a front detector and a rear detector.

22. The vehicular detection system of claim 20, wherein the signal processing unit is configured to change the speed setting of the cruise control from a first speed to a second speed when the congestion condition is determined and further configured to return the speed setting to the first speed after a period of time.

23. The vehicular detection system of claim 20, wherein the signal processing unit determines that the first target vehicle, the second target vehicle and the detection system will converge to create the congestion condition when a least one of the vehicles and the detection system must change at least one of a respective speed and direction to avoid a collision based upon current trajectories.

24. The vehicular detection system of claim 20, further comprising:

at least one rear view mirror disposed on the targeting vehicle; and

an output device disposed on the at least one rear view mirror and connected to the signal processing unit to receive a warning signal therefrom if the speed is greater than the threshold speed.