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1. WO2013162446 - A METHOD FOR ACTIVATING SAFETY SYSTEMS OF A VEHICLE

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS:

1 . A method for activating safety systems of a motor vehicle (1 ), the method comprising the steps of:

monitoring signals from at least one vehicle sensor (5-10);

analysing the signals from the at least one sensor (5-10) to determine that the vehicle (1 ) appears to be involved in a particular one of a plurality of pre-defined "run off the road" events:

confirming the determination by analysing signals from at least one different vehicle sensor (5-10), performing a different analysis on the signals from the at least one sensor (5-10), or analysing signals from the at least one sensor (5-10) over a predetermined period of time;

where a detection is confirmed, estimating the severity of the event; and based on a confirmed determination that the vehicle (1 ) is involved in a particular event, and the estimated severity of the event, selecting one or more vehicle safety systems to be activated to protect an occupant of the vehicle (1 ).

2. A method according to claim 1 , wherein the analysing step includes determining that the vehicle (1 ) appears to be involved in a particular one of: travelling over rough terrain (14); entering a ditch (15); and being airborne;

3. A method according to claim 1 or 2, comprising the step of comparing the signals received from the sensor (5-10) with stored thresholds relating to each of the pre-defined events.

4. A method according to any preceding claim wherein the detection of an event is confirmed if signals indicating that the event is occurring persist for a predetermined length of time.

5. A method according to any preceding claim, further including a state selection step, carried out after the confirming step, wherein, when the signals received from the at least one vehicle sensor (5-10) could indicate that two or more possible events are occurring, selecting one of the two or more possible events.

6. A method according to claim 5, wherein an event is selected using a hierarchy.

7. A method according to claim 5 or 6 wherein, if the signals from the at least one sensor (5-10) could indicate that the vehicle (1 ) is airborne, or is travelling over rough terrain (14) or is entering a ditch (15), the state of the vehicle (1 ) being airborne is selected.

8. A method according to any one of claims 5 to 7 wherein, if the signals from the at least one sensor (5-10) could indicate that the vehicle (1 ) is entering a ditch (15) or travelling over rough terrain (14), the state of travelling over rough terrain (14) is selected.

9. A method according to any one of claims 5 to 8 wherein the state of entering a ditch (15) is selected only if the signals from the vehicle sensors (5-10) are not consistent with the vehicle (1 ) being airborne or the vehicle travelling over rough terrain (14).

10. A method according to any preceding claim, wherein the vehicle (1 ) is equipped with a reversible restraint system and an irreversible restraint system, and wherein the reversible restraint system is activated if the estimated severity is above a first threshold but below a second threshold, and the irreversible restraint system is activated if the estimated severity is above the second threshold.

1 1 . A computer program comprising computer program code adapted to perform all of the steps of any one of the preceding claims when run on a computer.

12. A computer program according to claim 1 1 , embodied on a computer-readable medium.

13. A vehicle (1 ) having at least one vehicle sensor (5-10), one or more vehicle safety systems (12, 13) and a processor (1 1 ), wherein the processor (1 1 ) is operable to carry out all of the steps of any one of claims 1 to 10.