System and method for estimating post-collision vehicular velocity changes

• US 6,885,981 B2
• Filed: 01/14/2002
• Issued: 04/26/2005
• Est. Priority Date: 02/04/1998
• Status: Expired due to Term

• Current Assignee: CCC Information Services, Inc.
• Original Assignee: Injury Sciences, LLC (CCC Information Services Group Incorporated)
• Inventors: Smith, Darrin A., Kidd, Scott D., Pancratz, David J., Bomar, John B. Jr.
• Primary Examiner(s): FREJD, RUSSELL WARREN
• Application Number:
  US10/046,846
• Publication Number:
  US 20020099527A1
• Time in Patent Office: 1,198 Days
• Field of Search: 703/1, 703/6, 703/7, 703/8, 700/303, 705/4, 702/33, 702/142, 702/150, 345/339, 345/340, 345/349
• US Class Current: 703/8
• CPC Class Codes: G06Q 99/00 Subject matter not provided for in other groups of this subclass

Abstract

A system and method that utilizes information relating to vehicle damage information including damaged vehicle area information, crush depth of the damaged areas information, and vehicle component-by-component damage information to estimate the relative velocities of vehicles involved in a collision. The change in velocity is estimated using a plurality of methods, and a determination is made as to which method provided a result that is likely to be more accurate, based on the damage information, and the types of vehicles involved. The results from each method may also be weighted and combined to provide a multi-method estimate of the closing velocity. The methods include using crash test data from one or more sources, estimating closing velocity based on the principals of conservation of momentum, and estimating closing velocity based on deformation energy resulting from the collision.

Claims

1. A computer program product encoded in computer readable media, the computer program product comprising:

first instructions, executable by a processor, for receiving input information regarding damaged vehicle components for at least one vehicle;

second instructions, executable by the processor, for categorizing damage zones with respect to the location of the bumper of a vehicle;

third instructions, executable by the processor, for categorizing at least one damaged vehicle component with respect to its location on the vehicle; and

fourth instructions, executable by the processor, for estimating change in the vehicle'"'"'s velocity as a result of a collision based on the damaged vehicle components information.

2. A computer system comprising:

a processor;

computer readable medium coupled to the processor;

first computer code, encoded in the computer readable medium and executable by the processor, for generating a first graphical user interface, wherein the first graphical user interface includes a first screen object representing a vehicle, a second screen object having data entry fields to allow entry of damaged vehicle components and repair/replace estimate information;

second computer code, encoded in the computer readable medium and executable by the processor, for generating a second graphical user interface, wherein the second graphical user interface includes a third screen object representing the vehicle, and a fourth screen object having data entry fields to allow entry of damaged vehicle components and visual damage information;

third computer code, encoded in the computer readable medium and executable by the processor, for rating damage severity of each vehicle component according to a set of predetermined rules;

fourth computer code, encoded in the computer readable medium and executable by the processor, to determine an overall damage rating for the vehicle based on rated damage to the vehicle components;

fifth computer code, encoded in the computer readable medium and executable by the processor, to compare the overall damage rating for the vehicle to a crash test vehicle having an overall rating based on component damage rates in accordance with the set of rules; and

sixth computer code, encoded in the computer readable medium and executable by the processor, for estimating change in the vehicle'"'"'s velocity as a result of a collision, the change in the vehicle'"'"'s velocity being based on the damaged vehicle components and the component damage ratings.

3. A computer-implemented method for estimating the change in velocity of a vehicle as a result of a collision, the method comprising:

(a) acquiring information regarding damaged components of at least one vehicle;

(b) assigning a damage rating to the at least one vehicle;

(c) determining whether to utilize crash test data for a first estimate of the change in velocity for the at least one vehicle based at least partially on the damage rating;

(d) determining a second estimate of the change in velocity for the at least one vehicle based on conservation of momentum;

(e) determining a third estimate of the change in velocity for the at least one vehicle based on deformation energy; and

(f) determining a final estimate of the change in velocity for the at least one vehicle based on at least one of the first, second, and third estimates of the change in velocity.

4. The computer-implemented method of claim 3, wherein said final estimate is determined as a weighted combination of said first estimate and said third estimate.

5. The computer-implemented method of claim 4, wherein said weighted combination is based upon a correlation between said crash test data and said at least one vehicle.

6. A computer-implemented method, comprising:

receiving a damage rating for a subject vehicle, said damage rating comprising one of a plurality of preselected levels;

comparing said damage rating to a crash test damage rating to determine compliance with a predetermined rule, said crash test damage rating associated with a crash test vehicle related to said subject vehicle; and

estimating a change in velocity of said subject vehicle using data from said crash test vehicle if said comparing indicates compliance with said predetermined rule.

7. The computer-implemented method of claim 6, further comprising performing said estimating iteratively to obtain a population of said change in velocity.

8. The computer-implemented method of claim 7, further comprising providing said population of said change in velocity to a change in velocity combining module.

9. The computer-implemented method of claim 6, wherein said plurality of preselected levels comprise values in accordance with severity of component damage.

10. The computer-implemented method of claim 9, wherein said severity is determined with reference to repair/replace estimate information.

11. The computer-implemented method of claim 6, wherein said predetermined rule comprises whether said crash test damage rating is greater than said damage rating.

12. The computer-implemented method of claim 6, wherein said crash test vehicle is identical to said subject vehicle.

13. The computer-implemented method of claim 6, wherein said crash test damage rating is derived from at least one of IIHS or CR crash test data.

14. The computer-implemented method of claim 6, further comprising evaluating injury potential for an occupant of said subject vehicle based on said change in velocity.

15. A computer-implemented method, comprising:

calculating a first change in velocity for a first vehicle using a first crash test change in velocity for a second vehicle, said first and second vehicles being involved in a collision;

calculating a second change in velocity for said second vehicle using a second crash test change in velocity for said first vehicle;

determining which of said first change in velocity and said second change in velocity are in closer agreement with said second crash test change in velocity and said first crash test change in velocity, respectively; and

selecting one of said first crash test change in velocity and said second crash test change in velocity for further processing based on which is in said closer agreement.

16. The computer-implemented method of claim 15, wherein said further processing comprises combining said selected crash test change in velocity with at least one other estimate of change in velocity regarding said collision.

17. The computer-implemented method of claim 16, wherein said at least one other estimate is based on deformation energy.

18. The computer-implemented method of claim 16, further comprising evaluating injury potential for an occupant of one of said first and second vehicles based on one of said first change in velocity and said second change in velocity.

19. A computer-implemented method comprising:

obtaining damage information from a first vehicle and a second vehicle, said first vehicle and said second vehicle involved in a collision;

estimating deformation energy absorbed by said first and second vehicles during said collision based on said damage information;

estimating principal forces on said first and second vehicles during said collision based on stiffness parameters and crush depth for each of said first and second vehicles;

estimating a coefficient of restitution for said collision;

estimating a closing velocity between said first vehicle and said second vehicle; and

determining a change in velocity for said first vehicle and said second vehicle based upon said coefficient of restitution and said closing velocity.

20. The computer-implemented of claim 19, further comprising obtaining a distribution of said change in velocity using a plurality of parameter combinations.

21. The computer-implemented method of claim 20, wherein said parameter combinations comprise at least one of the following:

vehicle weight, said stiffness parameters, said crush depth, and said coefficient of restitution.

22. The computer-implemented method of claim 19, further comprising determining whether an override/underride condition existed in said collision.

23. The computer-implemented method of claim 22, further comprising adjusting said stiffness parameters if said override/underride condition existed.

24. The computer-implemented method of claim 19, further comprising evaluating injury potential for an occupant of one of said first and second vehicles based on said change in velocity of the respective one of the first and second vehicles.

25. The computer-implemented method of claim 19, further comprising adjusting said stiffness parameters for at least one of said first and second vehicles if said principal forces are not substantially balanced.

26. A computer-implemented method, comprising:

receiving a damage rating for a subject vehicle;

comparing said damage rating to a plurality of crash test damage ratings to determine compliance with at least one predetermined rule, said crash test damage ratings associated with crash test vehicles related to said subject vehicle; and

estimating a change in velocity of said subject vehicle using data from at least one of said crash test vehicles if said comparing indicates compliance with said at least one predetermined rule.

27. The computer-implemented method of claim 26, wherein the at least one predetermined rule comprises a best fit between said plurality of crash test damage ratings and said damage rating.

28. The computer-implemented method of claim 26, further comprising evaluating injury potential for an occupant of said subject vehicle based on said change in velocity.