Airbag deployment-control process and apparatus therefor

• US 20060004504A1
• Filed: 07/02/2004
• Published: 01/05/2006
• Est. Priority Date: 07/02/2004
• Status: Active Grant

• Current Assignee: Calsonickansei North America Incorporated (Marelli Corporation)
• Original Assignee: Calsonickansei North America Incorporated (Marelli Corporation)
• Inventors: Bouladian, Raffi Artine
• Granted Patent: US 7,165,785 B2
• Time in Patent Office: Days
• US Class Current: 701/45
• CPC Class Codes: B60R 21/01516 using force or pressure sensing means
• CPC Class Codes: B60R 21/01534 using electromagneticwaves, e.g. infrared
• CPC Class Codes: B60R 21/33 Arrangements for non-electric triggering of inflation electrical circuits for triggering safety arrangements B60R21/01

Abstract

A process (100) and apparatus (20) for control of a deployment of an airbag (28) for a seat (30) in a motor vehicle (22). Upon issuance of a deployment request (R_D) by a vehicular computer (24) intended for a deployment activator (26), a processor (36) intercepts the deployment request (R_D). The processor (36) then receives a load mass (M), a load temperature (T), and a load height (H) from a mass sensor (38), a thermal-imaging sensor (52), and a proximity sensor (54), respectively. The processor (36) adjudicates the load mass (M), load temperature (T), and load height (H), to determine a deployment status (S_D). A deployment status (S_D) of pass (S_P) is adjudicated when the load mass (M) is greater than or equal to a reference mass (M_R), the load temperature (T) is greater than or equal to a reference temperature (T_R), and the load height (H) is greater than or equal to a reference height (H_R). A deployment status (S_D) of inhibit (S_I) is adjudicated otherwise. The processor (36) then passes or inhibits the passage of the deployment request (R_D) accordingly.

Claims

1. A method for control of a deployment of an airbag for a seat in a motor vehicle upon issuance of a deployment request by a vehicular computer within said motor vehicle, said method comprising:

intercepting said deployment request issued by said vehicular computer and intended for a deployment activator coupled to said airbag;

calculating a load mass of a load within said seat;

establishing a load temperature of said load;

ascertaining a load height of said load;

adjudicating a deployment status for said deployment of said airbag in response to said load mass, said load temperature, and said load height, wherein said adjudicating activity adjudicates said deployment status is to be one of a pass status and an inhibit status;

passing said deployment request to said deployment activator when said adjudicating activity adjudicates said deployment status is said pass status; and

inhibiting said deployment request from being passed to said deployment activator when said adjudicating activity adjudicates said deployment status is said inhibit status.

2. A method as claimed in claim 1 wherein said adjudicating activity adjudicates said deployment status is to be one of:

said pass status when;

said load mass is greater than or equal to a predetermined mass, said load temperature is greater than or equal to a predetermined temperature, and

said load height is greater than or equal to a predetermined height; and

said inhibit status when one of;

said load mass is less than said predetermined mass;

said load temperature is less than said predetermined temperature; and

said load height is less than said predetermined height.

3. A method as claimed in claim 1 wherein said calculating activity comprises:

coupling a mass sensor to said seat; and

receiving said load mass from said mass sensor.

4. A method as claimed in claim 3 wherein:

said mass sensor is one of a plurality of mass sensors;

said coupling activity couples each of said mass sensors to said seat; and

said receiving activity comprises;

acquiring a partial load mass from each of said mass sensors; and

summing said partial load masses to obtain said load mass.

5. A method as claimed in claim 1 wherein said establishing activity comprises:

focusing a thermal-imaging sensor upon said seat; and

receiving said load temperature from said thermal-imaging sensor.

6. A method as claimed in claim 1 wherein said ascertaining activity comprises:

focusing a proximity sensor upon said seat; and

receiving said load height from said proximity sensor.

7. A method as claimed in claim 1 wherein said adjudicating activity adjudicates said deployment status is to be one of:

a pass status when one of;

said load mass is less than a first predetermined mass; and

said load mass is greater than or equal to a second predetermined mass, said load temperature is greater than or equal to a predetermined temperature, and said load height is greater than or equal to a predetermined height; and

said inhibit status when one of;

said load mass is greater than said first predetermined mass and less than said second predetermined mass;

said load temperature is less than said predetermined temperature; and

said load height is less than said predetermined height.

8. A method as claimed in claim 1 wherein:

said establishing activity comprises receiving said load temperature from a thermal-imaging sensor, wherein said load temperature is one of a value and an error temperature;

said adjudicating activity adjudicates said deployment status is to be one of;

said pass status when;

said load mass is greater than or equal to a predetermined mass, said load temperature is greater than or equal to a predetermined temperature, and said load height is greater than or equal to a predetermined height; and

said inhibit status when one of;

said load mass is less than said predetermined mass;

said load temperature is one of said error temperature and less than said predetermined temperature; and

said load height is less than said predetermined height.

9. A method as claimed in claim 1 wherein:

said ascertaining activity comprises receiving said load height from a proximity sensor, wherein said load height is one of a value and an error height;

said adjudicating activity adjudicates said deployment status is to be one of;

said pass status when;

said load mass is greater than or equal to a predetermined mass, said load temperature is greater than or equal to a predetermined temperature, and said load height is greater than or equal to a predetermined height; and

said inhibit status when one of;

said load mass is less than said predetermined mass;

said load temperature is less than said predetermined temperature; and

said load height is one of said error height and less than said predetermined height.

10. A method as claimed in claim 1 wherein:

said establishing activity comprises receiving said load temperature from a thermal-imaging sensor, wherein said load temperature is one of a value and an error temperature;

said ascertaining activity comprises receiving said load height from a proximity sensor, wherein said load height is one of a value and an error height;

said adjudicating activity adjudicates said deployment status is to be one of;

said pass status when one of;

said load mass is greater than or equal to a predetermined mass, said load temperature is greater than or equal to a predetermined temperature, and said load height is greater than or equal to a predetermined height; and

said load mass is greater than or equal to said predetermined mass, said load temperature is said error temperature, and said load height is said error height; and

said inhibit status when one of;

said load mass is less than said predetermined mass;

said load temperature is less than said predetermined temperature;

said load height is less than said predetermined height;

said load mass is greater than or equal to said predetermined mass, said load temperature is said error temperature and said load height is greater than or equal to said predetermined height; and

said load mass is greater than or equal to said predetermined mass, said load temperature is greater than or equal to said predetermined temperature, and said load height is said error height.

11. An apparatus for control of a deployment of an airbag for a seat in a motor vehicle upon issuance of a deployment request by a vehicular computer within said motor vehicle, said apparatus comprising:

a mass sensor coupled to said seat and configured to determine a load mass of a load within said seat;

a thermal-imaging sensor focused upon said seat and configured to determine a load temperature of said load;

a proximity sensor focused upon said seat and configured to determine a load height of said load; and

a processor configured to;

intercept said deployment request issued by said vehicular computer and intended for a deployment activator;

adjudicate a deployment status for said deployment request in response to said load mass, in response to said load temperature, and said load height, said deployment status being one of a pass status and an inhibit status;

pass said deployment request to said deployment activator when said deployment status is said pass status; and

inhibit said deployment request from being passed to said deployment activator when said deployment status is said inhibit status.

12. An apparatus as claimed in claim 11 wherein said mass sensor is coupled to a frame of said seat.

13. An apparatus as claimed in claim 11 wherein:

said mass sensor is one of a plurality of mass sensors; and

each of said mass sensors is coupled to a corner of a frame of said seat.

14. An apparatus as claimed in claim 11 wherein:

said mass sensor is one of a plurality of mass sensors;

each of said mass sensors is configured to determine a proportionate partial load mass of said load;

said processor is additionally configured to sum said partial load mass from each of said mass sensors to produce said load mass.

15. An apparatus as claimed in claim 11 wherein said processor is configured to adjudicate said deployment status as one of:

said pass status when;

said load mass is greater than or equal to a predetermined mass, said load temperature is greater than or equal to a predetermined temperature, and said load height is greater than or equal to a predetermined height; and

said inhibit status when one of;

said load mass is less than said predetermined mass;

said load temperature is less than said predetermined temperature; and

said load height is less than said predetermined height.

16. An apparatus as claimed in claim 11 wherein said processor is configured to adjudicate said deployment status as one of:

said pass status when one of;

said load mass is less than a first predetermined mass; and

said load mass is greater than or equal to a second predetermined mass, said load temperature is greater than or equal to a predetermined temperature, and said load height is greater than or equal to a predetermined height; and

said inhibit status when one of;

said load mass is greater than or equal to said first predetermined mass and less than said second predetermined mass;

said load temperature is less than said predetermined temperature; and

said load height is less than said predetermined height.

17. An apparatus as claimed in claim 11 wherein:

said thermal-imaging sensor is configured to determine said load temperature as one of a value and an error temperature;

said proximity sensor is configured to determine said load height as one of a value and an error height; and

said processor is configured to adjudicate said deployment status as one of;

said pass status when one of;

said load mass is greater than or equal to a predetermined mass, said load temperature is greater than or equal to a predetermined temperature, and said load height is greater than or equal to a predetermined height; and

said load mass is greater than or equal to said predetermined mass, said load temperature is said error temperature, and said load height is said error height; and

said inhibit status when one of;

said load mass is less than said predetermined mass;

said load temperature is less than said predetermined temperature;

said load height is less than said predetermined height;

said load temperature is said error temperature, and said load height is greater than or equal to said predetermined height; and

said load temperature is greater than or equal to said predetermined temperature, and said load height is said error height.

18. An apparatus as claimed in claim 11 comprising an infrared sensor having a first use and a second use, wherein:

said infrared sensor comprises said thermal-imaging sensor during said first use; and

said infrared sensor comprises said proximity sensor during said second use.

19. A method for control of a deployment of an airbag for a seat in a motor vehicle upon issuance of a deployment request by a vehicular computer within said motor vehicle, said method comprising:

intercepting said deployment request issued by said vehicular computer and intended for a deployment activator coupled to said airbag;

coupling a mass sensor to said seat;

focusing a thermal-imaging sensor upon said seat;

focusing a proximity sensor upon said seat;

receiving a load mass of a load within said seat from said mass sensor;

receiving a load temperature of said load from said thermal-imaging sensor;

receiving a load height of said load from said proximity sensor;

adjudicating a deployment status for said deployment of said airbag to be one of;

a pass status when one of;

said load mass is less than a first predetermined mass; and

said load mass is greater than or equal to a second predetermined mass, said load temperature is greater than or equal to a predetermined temperature, and said load height is greater than or equal to a predetermined height; and

said inhibit status when one of;

said load mass is greater than said first predetermined mass and less than said second predetermined mass;

said load temperature is less than said predetermined temperature; and

said load height is less than said predetermined height;

passing said deployment request to said deployment activator when said adjudicating activity adjudicates said deployment status is said pass status; and

inhibiting said deployment request from being passed to said deployment activator when said adjudicating activity adjudicates said deployment status is said inhibit status.